/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/popl20-more/sum-array-hom.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-16 14:34:52,677 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-16 14:34:52,679 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-16 14:34:52,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-16 14:34:52,805 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 14:34:52,833 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-16 14:34:52,833 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-16 14:34:52,834 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-16 14:34:52,834 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-16 14:34:52,835 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-16 14:34:52,835 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-16 14:34:52,835 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-16 14:34:52,835 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-16 14:34:52,836 INFO L138 SettingsManager]: * Use SBE=true [2022-02-16 14:34:52,836 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-16 14:34:52,836 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-16 14:34:52,837 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-16 14:34:52,837 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-16 14:34:52,837 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-16 14:34:52,837 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-16 14:34:52,837 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-16 14:34:52,837 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-16 14:34:52,837 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-16 14:34:52,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-16 14:34:52,837 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-16 14:34:52,838 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-16 14:34:52,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-16 14:34:52,838 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-16 14:34:52,838 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-16 14:34:52,839 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-16 14:34:52,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-16 14:34:52,839 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-16 14:34:52,839 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-16 14:34:52,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-16 14:34:52,840 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-16 14:34:52,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-16 14:34:52,840 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-16 14:34:52,840 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-16 14:34:52,840 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITH_DEPRANKS [2022-02-16 14:34:52,840 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-16 14:34:53,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-16 14:34:53,083 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-16 14:34:53,085 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-16 14:34:53,086 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-16 14:34:53,086 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-16 14:34:53,087 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-array-hom.wvr.bpl [2022-02-16 14:34:53,088 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-array-hom.wvr.bpl' [2022-02-16 14:34:53,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-16 14:34:53,119 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-16 14:34:53,120 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-16 14:34:53,120 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-16 14:34:53,121 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-16 14:34:53,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:34:53" (1/1) ... [2022-02-16 14:34:53,139 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:34:53" (1/1) ... [2022-02-16 14:34:53,145 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-16 14:34:53,147 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-16 14:34:53,148 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-16 14:34:53,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-16 14:34:53,148 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-16 14:34:53,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:34:53" (1/1) ... [2022-02-16 14:34:53,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:34:53" (1/1) ... [2022-02-16 14:34:53,158 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:34:53" (1/1) ... [2022-02-16 14:34:53,158 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:34:53" (1/1) ... [2022-02-16 14:34:53,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:34:53" (1/1) ... [2022-02-16 14:34:53,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:34:53" (1/1) ... [2022-02-16 14:34:53,167 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:34:53" (1/1) ... [2022-02-16 14:34:53,168 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-16 14:34:53,169 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-16 14:34:53,169 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-16 14:34:53,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-16 14:34:53,170 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:34:53" (1/1) ... [2022-02-16 14:34:53,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-16 14:34:53,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:34:53,204 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 14:34:53,207 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 14:34:53,233 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-16 14:34:53,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-16 14:34:53,233 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-16 14:34:53,233 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-16 14:34:53,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-16 14:34:53,233 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-16 14:34:53,233 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-16 14:34:53,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-16 14:34:53,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-16 14:34:53,234 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-16 14:34:53,234 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-16 14:34:53,234 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-16 14:34:53,235 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 14:34:53,277 INFO L234 CfgBuilder]: Building ICFG [2022-02-16 14:34:53,278 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-16 14:34:53,407 INFO L275 CfgBuilder]: Performing block encoding [2022-02-16 14:34:53,418 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-16 14:34:53,423 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-16 14:34:53,427 INFO L202 PluginConnector]: Adding new model sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:34:53 BoogieIcfgContainer [2022-02-16 14:34:53,427 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-16 14:34:53,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-16 14:34:53,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-16 14:34:53,446 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-16 14:34:53,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:34:53" (1/2) ... [2022-02-16 14:34:53,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e0e432d and model type sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 02:34:53, skipping insertion in model container [2022-02-16 14:34:53,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:34:53" (2/2) ... [2022-02-16 14:34:53,448 INFO L111 eAbstractionObserver]: Analyzing ICFG sum-array-hom.wvr.bpl [2022-02-16 14:34:53,452 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-16 14:34:53,452 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-16 14:34:53,453 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-16 14:34:53,453 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-16 14:34:53,505 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-02-16 14:34:53,571 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-16 14:34:53,583 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 14:34:53,583 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-16 14:34:53,597 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2022-02-16 14:34:53,648 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:00,151 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 526838 transitions and produced 183322 states. [2022-02-16 14:35:01,207 INFO L276 IsEmpty]: Start isEmpty. Operand has 183322 states, 122589 states have (on average 2.0976759741901803) internal successors, (257152), 183321 states have internal predecessors, (257152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:01,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 14:35:01,472 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:01,472 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 14:35:01,473 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:35:01,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:01,478 INFO L85 PathProgramCache]: Analyzing trace with hash -234537446, now seen corresponding path program 1 times [2022-02-16 14:35:01,486 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:01,487 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086066998] [2022-02-16 14:35:01,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:01,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:01,635 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 14:35:01,635 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:01,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086066998] [2022-02-16 14:35:01,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086066998] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 14:35:01,636 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 14:35:01,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-16 14:35:01,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910439999] [2022-02-16 14:35:01,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 14:35:01,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-16 14:35:01,640 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:01,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-16 14:35:01,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-16 14:35:03,409 INFO L87 Difference]: Start difference. First operand has 183322 states, 122589 states have (on average 2.0976759741901803) internal successors, (257152), 183321 states have internal predecessors, (257152), 0 states have call successors, (0), 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 5 states, 5 states have (on average 3.6) 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 14:35:06,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:06,738 INFO L93 Difference]: Finished difference Result 179106 states and 252083 transitions. [2022-02-16 14:35:06,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-16 14:35:06,752 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) 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 14:35:06,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:07,103 INFO L225 Difference]: With dead ends: 179106 [2022-02-16 14:35:07,104 INFO L226 Difference]: Without dead ends: 55816 [2022-02-16 14:35:07,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-16 14:35:07,108 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 63 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:07,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 14 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:35:07,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55816 states. [2022-02-16 14:35:07,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55816 to 134. [2022-02-16 14:35:07,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.037593984962406) internal successors, (271), 133 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:07,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 271 transitions. [2022-02-16 14:35:07,687 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 271 transitions. Word has length 18 [2022-02-16 14:35:07,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:07,687 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 271 transitions. [2022-02-16 14:35:07,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) 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 14:35:07,688 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 271 transitions. [2022-02-16 14:35:07,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 14:35:07,689 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:07,689 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:07,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-16 14:35:07,689 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:35:07,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:07,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1872873864, now seen corresponding path program 1 times [2022-02-16 14:35:07,690 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:07,690 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799842863] [2022-02-16 14:35:07,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:07,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:07,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:07,746 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 14:35:07,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:07,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799842863] [2022-02-16 14:35:07,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799842863] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 14:35:07,747 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 14:35:07,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-16 14:35:07,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887978844] [2022-02-16 14:35:07,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 14:35:07,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-16 14:35:07,750 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:07,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-16 14:35:07,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-16 14:35:07,751 INFO L87 Difference]: Start difference. First operand 134 states and 271 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:07,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:07,794 INFO L93 Difference]: Finished difference Result 145 states and 282 transitions. [2022-02-16 14:35:07,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-16 14:35:07,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 14:35:07,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:07,795 INFO L225 Difference]: With dead ends: 145 [2022-02-16 14:35:07,795 INFO L226 Difference]: Without dead ends: 145 [2022-02-16 14:35:07,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 14:35:07,797 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 32 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:07,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 15 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:35:07,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-02-16 14:35:07,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2022-02-16 14:35:07,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.971830985915493) internal successors, (280), 142 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:07,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 280 transitions. [2022-02-16 14:35:07,812 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 280 transitions. Word has length 20 [2022-02-16 14:35:07,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:07,813 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 280 transitions. [2022-02-16 14:35:07,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:07,813 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 280 transitions. [2022-02-16 14:35:07,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-16 14:35:07,814 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:07,814 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:07,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-16 14:35:07,814 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:35:07,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:07,815 INFO L85 PathProgramCache]: Analyzing trace with hash 196648534, now seen corresponding path program 1 times [2022-02-16 14:35:07,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:07,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080170154] [2022-02-16 14:35:07,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:07,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:07,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:08,222 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 14:35:08,222 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:08,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080170154] [2022-02-16 14:35:08,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080170154] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:08,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932185232] [2022-02-16 14:35:08,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:08,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:08,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:08,235 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 14:35:08,236 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 14:35:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:08,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-16 14:35:08,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:08,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:08,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 15 treesize of output 11 [2022-02-16 14:35:08,864 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 14:35:08,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:08,948 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:35:08,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-02-16 14:35:09,104 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 14:35:09,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932185232] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:09,106 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:09,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-16 14:35:09,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797754236] [2022-02-16 14:35:09,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:09,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 14:35:09,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:09,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 14:35:09,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-02-16 14:35:09,109 INFO L87 Difference]: Start difference. First operand 143 states and 280 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 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 14:35:09,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:09,351 INFO L93 Difference]: Finished difference Result 237 states and 443 transitions. [2022-02-16 14:35:09,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 14:35:09,351 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 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 22 [2022-02-16 14:35:09,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:09,352 INFO L225 Difference]: With dead ends: 237 [2022-02-16 14:35:09,352 INFO L226 Difference]: Without dead ends: 232 [2022-02-16 14:35:09,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-02-16 14:35:09,353 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 203 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:09,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 42 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 128 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2022-02-16 14:35:09,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-02-16 14:35:09,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 158. [2022-02-16 14:35:09,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.9426751592356688) internal successors, (305), 157 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:09,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 305 transitions. [2022-02-16 14:35:09,359 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 305 transitions. Word has length 22 [2022-02-16 14:35:09,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:09,359 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 305 transitions. [2022-02-16 14:35:09,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 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 14:35:09,360 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 305 transitions. [2022-02-16 14:35:09,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-16 14:35:09,360 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:09,360 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:09,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-16 14:35:09,575 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 14:35:09,576 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:35:09,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:09,576 INFO L85 PathProgramCache]: Analyzing trace with hash 805974298, now seen corresponding path program 2 times [2022-02-16 14:35:09,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:09,577 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422669131] [2022-02-16 14:35:09,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:09,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:09,801 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 14:35:09,802 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:09,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422669131] [2022-02-16 14:35:09,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422669131] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:09,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591969108] [2022-02-16 14:35:09,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:35:09,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:09,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:09,804 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 14:35:09,805 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 14:35:09,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:35:09,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:35:09,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-16 14:35:09,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:10,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:35:10,080 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-02-16 14:35:10,189 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 14:35:10,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:10,279 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:35:10,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-02-16 14:35:10,395 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 14:35:10,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591969108] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:10,395 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:10,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2022-02-16 14:35:10,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713492377] [2022-02-16 14:35:10,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:10,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 14:35:10,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:10,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 14:35:10,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-02-16 14:35:10,397 INFO L87 Difference]: Start difference. First operand 158 states and 305 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:10,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:10,955 INFO L93 Difference]: Finished difference Result 266 states and 502 transitions. [2022-02-16 14:35:10,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 14:35:10,955 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-16 14:35:10,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:10,956 INFO L225 Difference]: With dead ends: 266 [2022-02-16 14:35:10,956 INFO L226 Difference]: Without dead ends: 260 [2022-02-16 14:35:10,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2022-02-16 14:35:10,957 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 149 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:10,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 70 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 321 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-02-16 14:35:10,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-16 14:35:10,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 159. [2022-02-16 14:35:10,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.9430379746835442) internal successors, (307), 158 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:10,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 307 transitions. [2022-02-16 14:35:10,969 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 307 transitions. Word has length 22 [2022-02-16 14:35:10,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:10,969 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 307 transitions. [2022-02-16 14:35:10,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:10,970 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 307 transitions. [2022-02-16 14:35:10,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-16 14:35:10,970 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:10,970 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:10,990 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 14:35:11,183 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 14:35:11,184 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:35:11,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:11,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1394777570, now seen corresponding path program 3 times [2022-02-16 14:35:11,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:11,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668033782] [2022-02-16 14:35:11,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:11,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:11,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:11,350 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 14:35:11,350 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:11,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668033782] [2022-02-16 14:35:11,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668033782] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:11,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460704969] [2022-02-16 14:35:11,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:35:11,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:11,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:11,352 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 14:35:11,360 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 14:35:11,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 14:35:11,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:35:11,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 14:35:11,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:11,607 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 15 treesize of output 11 [2022-02-16 14:35:11,679 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 14:35:11,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:11,722 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:35:11,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-02-16 14:35:11,857 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 14:35:11,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460704969] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:11,857 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:11,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-02-16 14:35:11,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54175776] [2022-02-16 14:35:11,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:11,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 14:35:11,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:11,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 14:35:11,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-02-16 14:35:11,859 INFO L87 Difference]: Start difference. First operand 159 states and 307 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 14:35:12,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:12,036 INFO L93 Difference]: Finished difference Result 232 states and 426 transitions. [2022-02-16 14:35:12,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 14:35:12,037 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 22 [2022-02-16 14:35:12,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:12,037 INFO L225 Difference]: With dead ends: 232 [2022-02-16 14:35:12,038 INFO L226 Difference]: Without dead ends: 226 [2022-02-16 14:35:12,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-02-16 14:35:12,039 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 91 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:12,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 88 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 120 Invalid, 0 Unknown, 86 Unchecked, 0.1s Time] [2022-02-16 14:35:12,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-02-16 14:35:12,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2022-02-16 14:35:12,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.9221556886227544) internal successors, (321), 167 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:12,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 321 transitions. [2022-02-16 14:35:12,043 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 321 transitions. Word has length 22 [2022-02-16 14:35:12,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:12,043 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 321 transitions. [2022-02-16 14:35:12,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 14:35:12,043 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 321 transitions. [2022-02-16 14:35:12,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 14:35:12,044 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:12,044 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:12,067 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 14:35:12,244 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 14:35:12,245 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:35:12,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:12,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1778530228, now seen corresponding path program 4 times [2022-02-16 14:35:12,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:12,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353803755] [2022-02-16 14:35:12,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:12,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:12,308 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:12,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353803755] [2022-02-16 14:35:12,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353803755] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:12,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604164189] [2022-02-16 14:35:12,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:35:12,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:12,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:12,310 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 14:35:12,311 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 14:35:12,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:35:12,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:35:12,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:35:12,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:12,503 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 14:35:12,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:12,620 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 14:35:12,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604164189] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:12,621 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:12,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-16 14:35:12,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576829213] [2022-02-16 14:35:12,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:12,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 14:35:12,622 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:12,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 14:35:12,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:35:12,622 INFO L87 Difference]: Start difference. First operand 168 states and 321 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 14:35:13,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:13,283 INFO L93 Difference]: Finished difference Result 507 states and 929 transitions. [2022-02-16 14:35:13,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-16 14:35:13,284 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 24 [2022-02-16 14:35:13,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:13,285 INFO L225 Difference]: With dead ends: 507 [2022-02-16 14:35:13,285 INFO L226 Difference]: Without dead ends: 507 [2022-02-16 14:35:13,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=492, Invalid=1488, Unknown=0, NotChecked=0, Total=1980 [2022-02-16 14:35:13,287 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 199 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:13,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 193 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:35:13,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-02-16 14:35:13,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 202. [2022-02-16 14:35:13,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.9751243781094527) internal successors, (397), 201 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:13,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 397 transitions. [2022-02-16 14:35:13,292 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 397 transitions. Word has length 24 [2022-02-16 14:35:13,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:13,293 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 397 transitions. [2022-02-16 14:35:13,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 14:35:13,293 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 397 transitions. [2022-02-16 14:35:13,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 14:35:13,294 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:13,294 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:13,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-02-16 14:35:13,507 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 14:35:13,507 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:35:13,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:13,508 INFO L85 PathProgramCache]: Analyzing trace with hash -2007404748, now seen corresponding path program 1 times [2022-02-16 14:35:13,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:13,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643498205] [2022-02-16 14:35:13,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:13,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:13,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:13,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:35:13,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:13,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643498205] [2022-02-16 14:35:13,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643498205] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:13,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822015306] [2022-02-16 14:35:13,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:13,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:13,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:13,544 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 14:35:13,546 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 14:35:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:13,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-16 14:35:13,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:13,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:35:13,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:13,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:35:13,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822015306] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:13,713 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:13,713 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-02-16 14:35:13,713 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407698455] [2022-02-16 14:35:13,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:13,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-16 14:35:13,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:13,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-16 14:35:13,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-02-16 14:35:13,714 INFO L87 Difference]: Start difference. First operand 202 states and 397 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 14:35:13,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:13,862 INFO L93 Difference]: Finished difference Result 454 states and 874 transitions. [2022-02-16 14:35:13,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 14:35:13,863 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 24 [2022-02-16 14:35:13,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:13,864 INFO L225 Difference]: With dead ends: 454 [2022-02-16 14:35:13,864 INFO L226 Difference]: Without dead ends: 454 [2022-02-16 14:35:13,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-02-16 14:35:13,865 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 107 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:13,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 36 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:35:13,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-02-16 14:35:13,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 316. [2022-02-16 14:35:13,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.123809523809524) internal successors, (669), 315 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:13,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 669 transitions. [2022-02-16 14:35:13,871 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 669 transitions. Word has length 24 [2022-02-16 14:35:13,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:13,872 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 669 transitions. [2022-02-16 14:35:13,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 14:35:13,872 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 669 transitions. [2022-02-16 14:35:13,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 14:35:13,873 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:13,873 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:13,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-16 14:35:14,098 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 14:35:14,098 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:35:14,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:14,099 INFO L85 PathProgramCache]: Analyzing trace with hash 437814964, now seen corresponding path program 5 times [2022-02-16 14:35:14,099 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:14,099 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774532321] [2022-02-16 14:35:14,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:14,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:14,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:14,148 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:14,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774532321] [2022-02-16 14:35:14,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774532321] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:14,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565575565] [2022-02-16 14:35:14,148 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:35:14,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:14,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:14,150 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 14:35:14,155 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 14:35:14,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:35:14,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:35:14,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:35:14,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:14,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:14,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:14,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565575565] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:14,349 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:14,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-16 14:35:14,349 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872865917] [2022-02-16 14:35:14,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:14,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 14:35:14,350 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:14,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 14:35:14,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:35:14,351 INFO L87 Difference]: Start difference. First operand 316 states and 669 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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 14:35:14,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:14,690 INFO L93 Difference]: Finished difference Result 798 states and 1650 transitions. [2022-02-16 14:35:14,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 14:35:14,690 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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 24 [2022-02-16 14:35:14,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:14,693 INFO L225 Difference]: With dead ends: 798 [2022-02-16 14:35:14,693 INFO L226 Difference]: Without dead ends: 791 [2022-02-16 14:35:14,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-02-16 14:35:14,694 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 244 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:14,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 115 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:35:14,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-02-16 14:35:14,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 541. [2022-02-16 14:35:14,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 2.224074074074074) internal successors, (1201), 540 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:14,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 1201 transitions. [2022-02-16 14:35:14,704 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 1201 transitions. Word has length 24 [2022-02-16 14:35:14,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:14,704 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 1201 transitions. [2022-02-16 14:35:14,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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 14:35:14,704 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 1201 transitions. [2022-02-16 14:35:14,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 14:35:14,705 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:14,706 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:14,730 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 14:35:14,919 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 14:35:14,919 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:35:14,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:14,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1364786488, now seen corresponding path program 2 times [2022-02-16 14:35:14,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:14,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723237426] [2022-02-16 14:35:14,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:14,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:14,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:14,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:14,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:14,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723237426] [2022-02-16 14:35:14,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723237426] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:14,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107385355] [2022-02-16 14:35:14,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:35:14,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:14,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:14,960 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 14:35:14,964 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 14:35:14,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:35:14,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:35:14,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-16 14:35:14,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:15,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:15,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:15,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:15,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107385355] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:15,134 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:15,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-02-16 14:35:15,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684837100] [2022-02-16 14:35:15,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:15,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-16 14:35:15,134 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:15,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-16 14:35:15,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-02-16 14:35:15,135 INFO L87 Difference]: Start difference. First operand 541 states and 1201 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 14:35:15,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:15,336 INFO L93 Difference]: Finished difference Result 920 states and 1841 transitions. [2022-02-16 14:35:15,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-16 14:35:15,337 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 24 [2022-02-16 14:35:15,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:15,339 INFO L225 Difference]: With dead ends: 920 [2022-02-16 14:35:15,339 INFO L226 Difference]: Without dead ends: 920 [2022-02-16 14:35:15,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:35:15,340 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 136 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:15,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 71 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:35:15,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-02-16 14:35:15,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 579. [2022-02-16 14:35:15,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 2.1747404844290656) internal successors, (1257), 578 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:15,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 1257 transitions. [2022-02-16 14:35:15,351 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 1257 transitions. Word has length 24 [2022-02-16 14:35:15,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:15,351 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 1257 transitions. [2022-02-16 14:35:15,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 14:35:15,351 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 1257 transitions. [2022-02-16 14:35:15,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 14:35:15,353 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:15,353 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:15,377 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 14:35:15,567 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 14:35:15,567 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:35:15,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:15,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1520202116, now seen corresponding path program 6 times [2022-02-16 14:35:15,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:15,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670463000] [2022-02-16 14:35:15,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:15,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:15,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:15,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:15,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670463000] [2022-02-16 14:35:15,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670463000] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:15,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828589824] [2022-02-16 14:35:15,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:35:15,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:15,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:15,629 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 14:35:15,640 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 14:35:15,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 14:35:15,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:35:15,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:35:15,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:15,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:15,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:15,806 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 14:35:15,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828589824] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:15,806 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:15,806 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-16 14:35:15,807 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745682115] [2022-02-16 14:35:15,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:15,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 14:35:15,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:15,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 14:35:15,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-16 14:35:15,808 INFO L87 Difference]: Start difference. First operand 579 states and 1257 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 14:35:16,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:16,245 INFO L93 Difference]: Finished difference Result 1166 states and 2392 transitions. [2022-02-16 14:35:16,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-16 14:35:16,245 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2022-02-16 14:35:16,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:16,248 INFO L225 Difference]: With dead ends: 1166 [2022-02-16 14:35:16,248 INFO L226 Difference]: Without dead ends: 1166 [2022-02-16 14:35:16,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=364, Invalid=1042, Unknown=0, NotChecked=0, Total=1406 [2022-02-16 14:35:16,249 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 161 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:16,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 112 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:35:16,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2022-02-16 14:35:16,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 584. [2022-02-16 14:35:16,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 2.171526586620926) internal successors, (1266), 583 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:16,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1266 transitions. [2022-02-16 14:35:16,264 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1266 transitions. Word has length 24 [2022-02-16 14:35:16,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:16,264 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 1266 transitions. [2022-02-16 14:35:16,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 14:35:16,264 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1266 transitions. [2022-02-16 14:35:16,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 14:35:16,266 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:16,266 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:16,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-16 14:35:16,479 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 14:35:16,479 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:35:16,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:16,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1873818808, now seen corresponding path program 7 times [2022-02-16 14:35:16,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:16,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873307116] [2022-02-16 14:35:16,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:16,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:16,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:16,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:16,530 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:16,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873307116] [2022-02-16 14:35:16,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873307116] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:16,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61246047] [2022-02-16 14:35:16,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:35:16,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:16,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:16,532 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 14:35:16,590 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 14:35:16,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:16,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:35:16,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:16,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:16,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:16,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61246047] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:16,794 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:16,794 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-02-16 14:35:16,795 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590862942] [2022-02-16 14:35:16,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:16,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 14:35:16,795 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:16,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 14:35:16,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-02-16 14:35:16,796 INFO L87 Difference]: Start difference. First operand 584 states and 1266 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 14:35:17,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:17,086 INFO L93 Difference]: Finished difference Result 1141 states and 2328 transitions. [2022-02-16 14:35:17,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 14:35:17,086 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 24 [2022-02-16 14:35:17,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:17,088 INFO L225 Difference]: With dead ends: 1141 [2022-02-16 14:35:17,089 INFO L226 Difference]: Without dead ends: 1141 [2022-02-16 14:35:17,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-02-16 14:35:17,090 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 205 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:17,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 117 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:35:17,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2022-02-16 14:35:17,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 821. [2022-02-16 14:35:17,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 2.2621951219512195) internal successors, (1855), 820 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:17,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1855 transitions. [2022-02-16 14:35:17,106 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1855 transitions. Word has length 24 [2022-02-16 14:35:17,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:17,106 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 1855 transitions. [2022-02-16 14:35:17,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 14:35:17,106 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1855 transitions. [2022-02-16 14:35:17,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 14:35:17,108 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:17,108 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:17,130 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 14:35:17,323 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 14:35:17,324 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:35:17,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:17,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1749610500, now seen corresponding path program 8 times [2022-02-16 14:35:17,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:17,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233576209] [2022-02-16 14:35:17,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:17,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:17,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:17,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:17,374 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:17,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233576209] [2022-02-16 14:35:17,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233576209] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:17,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672138734] [2022-02-16 14:35:17,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:35:17,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:17,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:17,375 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 14:35:17,376 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 14:35:17,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:35:17,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:35:17,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:35:17,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:17,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:17,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:17,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:17,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672138734] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:17,555 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:17,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-16 14:35:17,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146695153] [2022-02-16 14:35:17,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:17,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 14:35:17,555 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:17,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 14:35:17,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-02-16 14:35:17,556 INFO L87 Difference]: Start difference. First operand 821 states and 1855 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 14:35:18,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:18,014 INFO L93 Difference]: Finished difference Result 1523 states and 3273 transitions. [2022-02-16 14:35:18,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-16 14:35:18,015 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2022-02-16 14:35:18,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:18,018 INFO L225 Difference]: With dead ends: 1523 [2022-02-16 14:35:18,018 INFO L226 Difference]: Without dead ends: 1522 [2022-02-16 14:35:18,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=363, Invalid=1197, Unknown=0, NotChecked=0, Total=1560 [2022-02-16 14:35:18,019 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 168 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:18,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 131 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:35:18,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2022-02-16 14:35:18,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 854. [2022-02-16 14:35:18,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 2.246189917936694) internal successors, (1916), 853 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:18,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1916 transitions. [2022-02-16 14:35:18,039 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1916 transitions. Word has length 24 [2022-02-16 14:35:18,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:18,039 INFO L470 AbstractCegarLoop]: Abstraction has 854 states and 1916 transitions. [2022-02-16 14:35:18,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 14:35:18,039 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1916 transitions. [2022-02-16 14:35:18,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 14:35:18,041 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:18,041 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:18,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-16 14:35:18,263 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 14:35:18,263 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:35:18,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:18,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1212838136, now seen corresponding path program 3 times [2022-02-16 14:35:18,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:18,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509824122] [2022-02-16 14:35:18,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:18,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:35:18,307 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:18,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509824122] [2022-02-16 14:35:18,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509824122] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:18,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532741258] [2022-02-16 14:35:18,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:35:18,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:18,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:18,308 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 14:35:18,310 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 14:35:18,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 14:35:18,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:35:18,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-16 14:35:18,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:18,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:35:18,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:18,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:35:18,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532741258] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:18,466 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:18,466 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2022-02-16 14:35:18,466 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198264088] [2022-02-16 14:35:18,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:18,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-16 14:35:18,466 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:18,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-16 14:35:18,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-02-16 14:35:18,467 INFO L87 Difference]: Start difference. First operand 854 states and 1916 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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 14:35:18,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:18,573 INFO L93 Difference]: Finished difference Result 1018 states and 2194 transitions. [2022-02-16 14:35:18,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 14:35:18,573 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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 24 [2022-02-16 14:35:18,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:18,575 INFO L225 Difference]: With dead ends: 1018 [2022-02-16 14:35:18,575 INFO L226 Difference]: Without dead ends: 1018 [2022-02-16 14:35:18,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:35:18,576 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 94 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:18,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 42 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:35:18,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2022-02-16 14:35:18,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 835. [2022-02-16 14:35:18,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 2.2553956834532376) internal successors, (1881), 834 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:18,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1881 transitions. [2022-02-16 14:35:18,591 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1881 transitions. Word has length 24 [2022-02-16 14:35:18,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:18,591 INFO L470 AbstractCegarLoop]: Abstraction has 835 states and 1881 transitions. [2022-02-16 14:35:18,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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 14:35:18,591 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1881 transitions. [2022-02-16 14:35:18,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 14:35:18,593 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:18,593 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:18,617 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 14:35:18,815 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 14:35:18,815 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:35:18,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:18,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1763307140, now seen corresponding path program 9 times [2022-02-16 14:35:18,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:18,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280112421] [2022-02-16 14:35:18,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:18,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:18,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:18,855 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:18,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280112421] [2022-02-16 14:35:18,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280112421] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:18,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630979453] [2022-02-16 14:35:18,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:35:18,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:18,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:18,857 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 14:35:18,858 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 14:35:18,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:35:18,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:35:18,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:35:18,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:18,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:18,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:19,042 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 14:35:19,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630979453] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:19,043 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:19,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-16 14:35:19,043 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028905094] [2022-02-16 14:35:19,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:19,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-16 14:35:19,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:19,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-16 14:35:19,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-16 14:35:19,048 INFO L87 Difference]: Start difference. First operand 835 states and 1881 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 14:35:19,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:19,314 INFO L93 Difference]: Finished difference Result 1257 states and 2700 transitions. [2022-02-16 14:35:19,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-16 14:35:19,315 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 24 [2022-02-16 14:35:19,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:19,317 INFO L225 Difference]: With dead ends: 1257 [2022-02-16 14:35:19,317 INFO L226 Difference]: Without dead ends: 1257 [2022-02-16 14:35:19,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=599, Unknown=0, NotChecked=0, Total=812 [2022-02-16 14:35:19,317 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 161 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:19,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 98 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:35:19,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2022-02-16 14:35:19,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 891. [2022-02-16 14:35:19,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 2.251685393258427) internal successors, (2004), 890 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:19,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 2004 transitions. [2022-02-16 14:35:19,336 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 2004 transitions. Word has length 24 [2022-02-16 14:35:19,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:19,336 INFO L470 AbstractCegarLoop]: Abstraction has 891 states and 2004 transitions. [2022-02-16 14:35:19,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 14:35:19,336 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 2004 transitions. [2022-02-16 14:35:19,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 14:35:19,338 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:19,338 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:19,362 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 14:35:19,560 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 14:35:19,560 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:35:19,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:19,561 INFO L85 PathProgramCache]: Analyzing trace with hash 85686396, now seen corresponding path program 10 times [2022-02-16 14:35:19,561 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:19,561 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225622768] [2022-02-16 14:35:19,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:19,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:19,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:19,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:19,605 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:19,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225622768] [2022-02-16 14:35:19,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225622768] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:19,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974089929] [2022-02-16 14:35:19,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:35:19,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:19,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:19,607 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 14:35:19,637 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 14:35:19,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:35:19,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:35:19,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:35:19,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:19,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:19,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:35:19,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974089929] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:19,791 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:19,792 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-02-16 14:35:19,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944590179] [2022-02-16 14:35:19,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:19,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 14:35:19,794 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:19,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 14:35:19,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:35:19,794 INFO L87 Difference]: Start difference. First operand 891 states and 2004 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 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 14:35:20,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:20,038 INFO L93 Difference]: Finished difference Result 1151 states and 2521 transitions. [2022-02-16 14:35:20,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 14:35:20,039 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 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 24 [2022-02-16 14:35:20,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:20,040 INFO L225 Difference]: With dead ends: 1151 [2022-02-16 14:35:20,040 INFO L226 Difference]: Without dead ends: 1149 [2022-02-16 14:35:20,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-02-16 14:35:20,041 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 133 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:20,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 102 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:35:20,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-02-16 14:35:20,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1019. [2022-02-16 14:35:20,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 2.2858546168958744) internal successors, (2327), 1018 states have internal predecessors, (2327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:20,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 2327 transitions. [2022-02-16 14:35:20,114 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 2327 transitions. Word has length 24 [2022-02-16 14:35:20,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:20,114 INFO L470 AbstractCegarLoop]: Abstraction has 1019 states and 2327 transitions. [2022-02-16 14:35:20,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 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 14:35:20,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 2327 transitions. [2022-02-16 14:35:20,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 14:35:20,117 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:20,117 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:20,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-16 14:35:20,327 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 14:35:20,327 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:35:20,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:20,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1903831492, now seen corresponding path program 11 times [2022-02-16 14:35:20,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:20,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889278125] [2022-02-16 14:35:20,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:20,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:20,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:20,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:35:20,375 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:20,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889278125] [2022-02-16 14:35:20,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889278125] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:20,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641670592] [2022-02-16 14:35:20,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:35:20,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:20,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:20,380 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 14:35:20,383 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 14:35:20,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:35:20,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:35:20,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:35:20,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:20,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:35:20,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:20,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:35:20,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641670592] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:20,527 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:20,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-16 14:35:20,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94203219] [2022-02-16 14:35:20,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:20,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-16 14:35:20,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:20,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-16 14:35:20,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-16 14:35:20,528 INFO L87 Difference]: Start difference. First operand 1019 states and 2327 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 14:35:20,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:20,739 INFO L93 Difference]: Finished difference Result 1424 states and 3124 transitions. [2022-02-16 14:35:20,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 14:35:20,740 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 24 [2022-02-16 14:35:20,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:20,743 INFO L225 Difference]: With dead ends: 1424 [2022-02-16 14:35:20,743 INFO L226 Difference]: Without dead ends: 1423 [2022-02-16 14:35:20,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2022-02-16 14:35:20,745 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 129 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:20,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 95 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:35:20,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2022-02-16 14:35:20,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1019. [2022-02-16 14:35:20,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 2.2848722986247543) internal successors, (2326), 1018 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:20,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 2326 transitions. [2022-02-16 14:35:20,767 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 2326 transitions. Word has length 24 [2022-02-16 14:35:20,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:20,768 INFO L470 AbstractCegarLoop]: Abstraction has 1019 states and 2326 transitions. [2022-02-16 14:35:20,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 14:35:20,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 2326 transitions. [2022-02-16 14:35:20,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 14:35:20,769 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:20,770 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:20,795 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 14:35:20,984 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 14:35:20,985 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:35:20,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:20,985 INFO L85 PathProgramCache]: Analyzing trace with hash -369242560, now seen corresponding path program 12 times [2022-02-16 14:35:20,985 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:20,985 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29136476] [2022-02-16 14:35:20,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:20,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:20,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:21,031 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 14:35:21,031 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:21,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29136476] [2022-02-16 14:35:21,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29136476] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:21,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93445618] [2022-02-16 14:35:21,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:35:21,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:21,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:21,032 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 14:35:21,033 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 14:35:21,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 14:35:21,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:35:21,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:35:21,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:21,170 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 14:35:21,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:21,242 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 14:35:21,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93445618] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:21,243 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:21,243 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-02-16 14:35:21,244 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872411063] [2022-02-16 14:35:21,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:21,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-16 14:35:21,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:21,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-16 14:35:21,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-02-16 14:35:21,246 INFO L87 Difference]: Start difference. First operand 1019 states and 2326 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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 14:35:21,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:21,515 INFO L93 Difference]: Finished difference Result 1430 states and 3155 transitions. [2022-02-16 14:35:21,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-16 14:35:21,515 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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 24 [2022-02-16 14:35:21,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:21,517 INFO L225 Difference]: With dead ends: 1430 [2022-02-16 14:35:21,517 INFO L226 Difference]: Without dead ends: 1430 [2022-02-16 14:35:21,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=545, Unknown=0, NotChecked=0, Total=756 [2022-02-16 14:35:21,518 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 104 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:21,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 120 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:35:21,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2022-02-16 14:35:21,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1042. [2022-02-16 14:35:21,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1041 states have (on average 2.2804995196926034) internal successors, (2374), 1041 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:21,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 2374 transitions. [2022-02-16 14:35:21,537 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 2374 transitions. Word has length 24 [2022-02-16 14:35:21,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:21,537 INFO L470 AbstractCegarLoop]: Abstraction has 1042 states and 2374 transitions. [2022-02-16 14:35:21,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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 14:35:21,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 2374 transitions. [2022-02-16 14:35:21,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 14:35:21,539 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:21,539 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:21,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-02-16 14:35:21,749 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 14:35:21,749 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:35:21,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:21,749 INFO L85 PathProgramCache]: Analyzing trace with hash -715193216, now seen corresponding path program 13 times [2022-02-16 14:35:21,749 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:21,749 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146992256] [2022-02-16 14:35:21,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:21,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:21,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:21,805 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:21,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146992256] [2022-02-16 14:35:21,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146992256] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:21,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360706769] [2022-02-16 14:35:21,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:35:21,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:21,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:21,807 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 14:35:21,818 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 14:35:21,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:21,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:35:21,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:21,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:21,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:21,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:21,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360706769] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:21,954 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:21,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-02-16 14:35:21,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533864479] [2022-02-16 14:35:21,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:21,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 14:35:21,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:21,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 14:35:21,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-16 14:35:21,955 INFO L87 Difference]: Start difference. First operand 1042 states and 2374 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 14:35:22,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:22,213 INFO L93 Difference]: Finished difference Result 1445 states and 3168 transitions. [2022-02-16 14:35:22,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 14:35:22,214 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 24 [2022-02-16 14:35:22,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:22,216 INFO L225 Difference]: With dead ends: 1445 [2022-02-16 14:35:22,216 INFO L226 Difference]: Without dead ends: 1442 [2022-02-16 14:35:22,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:35:22,217 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 156 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:22,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 95 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:35:22,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2022-02-16 14:35:22,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 1045. [2022-02-16 14:35:22,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 2.2768199233716473) internal successors, (2377), 1044 states have internal predecessors, (2377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:22,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 2377 transitions. [2022-02-16 14:35:22,238 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 2377 transitions. Word has length 24 [2022-02-16 14:35:22,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:22,238 INFO L470 AbstractCegarLoop]: Abstraction has 1045 states and 2377 transitions. [2022-02-16 14:35:22,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 14:35:22,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 2377 transitions. [2022-02-16 14:35:22,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:35:22,240 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:22,240 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:22,263 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 14:35:22,455 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 14:35:22,455 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:35:22,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:22,456 INFO L85 PathProgramCache]: Analyzing trace with hash 2057447698, now seen corresponding path program 4 times [2022-02-16 14:35:22,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:22,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228898871] [2022-02-16 14:35:22,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:22,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:22,750 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 14:35:22,750 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:22,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228898871] [2022-02-16 14:35:22,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228898871] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:22,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733106911] [2022-02-16 14:35:22,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:35:22,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:22,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:22,756 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 14:35:22,757 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 14:35:22,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:35:22,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:35:22,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 14:35:22,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:23,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:35:23,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:23,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-16 14:35:23,214 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 14:35:23,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:23,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:23,490 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:35:23,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 56 [2022-02-16 14:35:23,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:23,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:23,734 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:35:23,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-02-16 14:35:24,023 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 14:35:24,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733106911] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:24,023 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:24,023 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-16 14:35:24,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183394577] [2022-02-16 14:35:24,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:24,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 14:35:24,024 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:24,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 14:35:24,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-02-16 14:35:24,024 INFO L87 Difference]: Start difference. First operand 1045 states and 2377 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:26,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:26,233 INFO L93 Difference]: Finished difference Result 1696 states and 3597 transitions. [2022-02-16 14:35:26,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-16 14:35:26,233 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:35:26,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:26,236 INFO L225 Difference]: With dead ends: 1696 [2022-02-16 14:35:26,236 INFO L226 Difference]: Without dead ends: 1691 [2022-02-16 14:35:26,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=721, Invalid=2939, Unknown=0, NotChecked=0, Total=3660 [2022-02-16 14:35:26,237 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 288 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:26,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 138 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:35:26,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2022-02-16 14:35:26,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1085. [2022-02-16 14:35:26,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1085 states, 1084 states have (on average 2.2924354243542435) internal successors, (2485), 1084 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:26,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1085 states to 1085 states and 2485 transitions. [2022-02-16 14:35:26,257 INFO L78 Accepts]: Start accepts. Automaton has 1085 states and 2485 transitions. Word has length 26 [2022-02-16 14:35:26,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:26,257 INFO L470 AbstractCegarLoop]: Abstraction has 1085 states and 2485 transitions. [2022-02-16 14:35:26,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:26,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1085 states and 2485 transitions. [2022-02-16 14:35:26,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:35:26,259 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:26,259 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:26,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-16 14:35:26,481 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 14:35:26,482 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:35:26,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:26,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1983730474, now seen corresponding path program 5 times [2022-02-16 14:35:26,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:26,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281996214] [2022-02-16 14:35:26,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:26,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:26,806 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 14:35:26,806 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:26,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281996214] [2022-02-16 14:35:26,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281996214] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:26,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051495411] [2022-02-16 14:35:26,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:35:26,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:26,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:26,812 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 14:35:26,814 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 14:35:26,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:35:26,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:35:26,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-16 14:35:26,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:27,262 INFO L353 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2022-02-16 14:35:27,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 47 [2022-02-16 14:35:27,304 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 14:35:27,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:27,572 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:35:27,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 71 [2022-02-16 14:35:28,327 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 14:35:28,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051495411] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:28,327 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:28,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-16 14:35:28,327 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994948659] [2022-02-16 14:35:28,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:28,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:35:28,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:28,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:35:28,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:35:28,329 INFO L87 Difference]: Start difference. First operand 1085 states and 2485 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:30,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:30,182 INFO L93 Difference]: Finished difference Result 2274 states and 5218 transitions. [2022-02-16 14:35:30,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-16 14:35:30,182 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:35:30,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:30,236 INFO L225 Difference]: With dead ends: 2274 [2022-02-16 14:35:30,236 INFO L226 Difference]: Without dead ends: 2269 [2022-02-16 14:35:30,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1151 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=561, Invalid=3221, Unknown=0, NotChecked=0, Total=3782 [2022-02-16 14:35:30,241 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 232 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:30,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 128 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 483 Invalid, 0 Unknown, 269 Unchecked, 0.3s Time] [2022-02-16 14:35:30,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2022-02-16 14:35:30,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 1097. [2022-02-16 14:35:30,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 1096 states have (on average 2.291970802919708) internal successors, (2512), 1096 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:30,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 2512 transitions. [2022-02-16 14:35:30,280 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 2512 transitions. Word has length 26 [2022-02-16 14:35:30,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:30,280 INFO L470 AbstractCegarLoop]: Abstraction has 1097 states and 2512 transitions. [2022-02-16 14:35:30,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:30,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 2512 transitions. [2022-02-16 14:35:30,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:35:30,282 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:30,282 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:30,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-16 14:35:30,501 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 14:35:30,502 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:35:30,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:30,503 INFO L85 PathProgramCache]: Analyzing trace with hash 207700114, now seen corresponding path program 14 times [2022-02-16 14:35:30,503 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:30,503 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773078550] [2022-02-16 14:35:30,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:30,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:30,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:30,840 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:30,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773078550] [2022-02-16 14:35:30,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773078550] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:30,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961922077] [2022-02-16 14:35:30,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:35:30,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:30,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:30,841 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 14:35:30,843 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 14:35:30,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:35:30,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:35:30,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-16 14:35:30,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:31,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:35:31,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:31,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:35:31,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:31,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-02-16 14:35:31,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:31,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:31,377 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:35:31,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22 treesize of output 47 [2022-02-16 14:35:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:31,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961922077] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:31,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:31,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-02-16 14:35:31,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633357653] [2022-02-16 14:35:31,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:31,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 14:35:31,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:31,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 14:35:31,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-02-16 14:35:31,518 INFO L87 Difference]: Start difference. First operand 1097 states and 2512 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:33,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:33,782 INFO L93 Difference]: Finished difference Result 1711 states and 3776 transitions. [2022-02-16 14:35:33,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-16 14:35:33,783 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:35:33,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:33,786 INFO L225 Difference]: With dead ends: 1711 [2022-02-16 14:35:33,786 INFO L226 Difference]: Without dead ends: 1699 [2022-02-16 14:35:33,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=784, Invalid=4328, Unknown=0, NotChecked=0, Total=5112 [2022-02-16 14:35:33,788 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 242 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:33,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 225 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:35:33,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2022-02-16 14:35:33,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1115. [2022-02-16 14:35:33,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1114 states have (on average 2.279174147217235) internal successors, (2539), 1114 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:33,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 2539 transitions. [2022-02-16 14:35:33,810 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 2539 transitions. Word has length 26 [2022-02-16 14:35:33,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:33,810 INFO L470 AbstractCegarLoop]: Abstraction has 1115 states and 2539 transitions. [2022-02-16 14:35:33,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:33,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 2539 transitions. [2022-02-16 14:35:33,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:35:33,813 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:33,813 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:33,836 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 14:35:34,027 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 14:35:34,027 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:35:34,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:34,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1134671638, now seen corresponding path program 6 times [2022-02-16 14:35:34,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:34,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952453035] [2022-02-16 14:35:34,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:34,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:34,281 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 14:35:34,281 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:34,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952453035] [2022-02-16 14:35:34,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952453035] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:34,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236021319] [2022-02-16 14:35:34,281 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:35:34,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:34,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:34,282 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 14:35:34,283 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 14:35:34,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 14:35:34,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:35:34,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-16 14:35:34,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:34,750 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:35:34,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 30 [2022-02-16 14:35:34,869 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 14:35:34,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:35,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:35,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:35,142 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:35:35,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 48 [2022-02-16 14:35:35,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:35,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 5 [2022-02-16 14:35:35,407 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 14:35:35,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236021319] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:35,407 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:35,407 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-02-16 14:35:35,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682177144] [2022-02-16 14:35:35,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:35,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-16 14:35:35,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:35,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-16 14:35:35,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-02-16 14:35:35,409 INFO L87 Difference]: Start difference. First operand 1115 states and 2539 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:39,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:39,832 INFO L93 Difference]: Finished difference Result 1775 states and 3751 transitions. [2022-02-16 14:35:39,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-16 14:35:39,832 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:35:39,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:39,835 INFO L225 Difference]: With dead ends: 1775 [2022-02-16 14:35:39,835 INFO L226 Difference]: Without dead ends: 1754 [2022-02-16 14:35:39,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2060 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1066, Invalid=6074, Unknown=0, NotChecked=0, Total=7140 [2022-02-16 14:35:39,837 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 367 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1680 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:39,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 305 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1680 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-16 14:35:39,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2022-02-16 14:35:39,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1124. [2022-02-16 14:35:39,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1123 states have (on average 2.2751558325912735) internal successors, (2555), 1123 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:39,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 2555 transitions. [2022-02-16 14:35:39,858 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 2555 transitions. Word has length 26 [2022-02-16 14:35:39,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:39,858 INFO L470 AbstractCegarLoop]: Abstraction has 1124 states and 2555 transitions. [2022-02-16 14:35:39,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:39,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 2555 transitions. [2022-02-16 14:35:39,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:35:39,860 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:39,860 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:39,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-16 14:35:40,062 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 14:35:40,062 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:35:40,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:40,063 INFO L85 PathProgramCache]: Analyzing trace with hash 245927254, now seen corresponding path program 7 times [2022-02-16 14:35:40,063 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:40,063 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820483455] [2022-02-16 14:35:40,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:40,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:40,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:40,293 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 14:35:40,294 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:40,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820483455] [2022-02-16 14:35:40,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820483455] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:40,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825193994] [2022-02-16 14:35:40,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:35:40,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:40,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:40,295 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 14:35:40,296 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 14:35:40,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:40,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 14:35:40,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:40,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:35:40,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:40,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-16 14:35:40,673 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 14:35:40,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:40,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:40,900 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:35:40,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 56 [2022-02-16 14:35:41,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:41,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:41,080 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:35:41,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-02-16 14:35:41,319 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 14:35:41,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825193994] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:41,319 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:41,319 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-16 14:35:41,319 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484016936] [2022-02-16 14:35:41,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:41,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 14:35:41,320 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:41,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 14:35:41,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-02-16 14:35:41,320 INFO L87 Difference]: Start difference. First operand 1124 states and 2555 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:43,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:43,171 INFO L93 Difference]: Finished difference Result 1767 states and 3716 transitions. [2022-02-16 14:35:43,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-16 14:35:43,171 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:35:43,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:43,173 INFO L225 Difference]: With dead ends: 1767 [2022-02-16 14:35:43,174 INFO L226 Difference]: Without dead ends: 1762 [2022-02-16 14:35:43,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=710, Invalid=2950, Unknown=0, NotChecked=0, Total=3660 [2022-02-16 14:35:43,175 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 334 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:43,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 237 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 990 Invalid, 0 Unknown, 71 Unchecked, 0.5s Time] [2022-02-16 14:35:43,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1762 states. [2022-02-16 14:35:43,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1762 to 1130. [2022-02-16 14:35:43,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1129 states have (on average 2.274579273693534) internal successors, (2568), 1129 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:43,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 2568 transitions. [2022-02-16 14:35:43,198 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 2568 transitions. Word has length 26 [2022-02-16 14:35:43,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:43,198 INFO L470 AbstractCegarLoop]: Abstraction has 1130 states and 2568 transitions. [2022-02-16 14:35:43,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:43,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 2568 transitions. [2022-02-16 14:35:43,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:35:43,200 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:43,201 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:43,225 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 14:35:43,416 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 14:35:43,416 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:35:43,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:43,416 INFO L85 PathProgramCache]: Analyzing trace with hash 948958874, now seen corresponding path program 8 times [2022-02-16 14:35:43,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:43,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107418326] [2022-02-16 14:35:43,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:43,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:43,670 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 14:35:43,670 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:43,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107418326] [2022-02-16 14:35:43,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107418326] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:43,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375846252] [2022-02-16 14:35:43,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:35:43,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:43,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:43,672 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 14:35:43,699 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 14:35:43,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:35:43,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:35:43,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-16 14:35:43,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:44,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:35:44,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:35:44,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2022-02-16 14:35:44,301 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 14:35:44,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:44,543 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:35:44,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 71 [2022-02-16 14:35:45,852 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 14:35:45,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375846252] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:45,853 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:45,853 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-02-16 14:35:45,853 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279515689] [2022-02-16 14:35:45,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:45,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 14:35:45,854 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:45,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 14:35:45,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:35:45,855 INFO L87 Difference]: Start difference. First operand 1130 states and 2568 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:49,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:49,798 INFO L93 Difference]: Finished difference Result 2158 states and 4686 transitions. [2022-02-16 14:35:49,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-16 14:35:49,798 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:35:49,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:49,802 INFO L225 Difference]: With dead ends: 2158 [2022-02-16 14:35:49,802 INFO L226 Difference]: Without dead ends: 2152 [2022-02-16 14:35:49,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2179 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1159, Invalid=5321, Unknown=0, NotChecked=0, Total=6480 [2022-02-16 14:35:49,804 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 287 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 438 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:49,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 204 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 714 Invalid, 0 Unknown, 438 Unchecked, 0.4s Time] [2022-02-16 14:35:49,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2022-02-16 14:35:49,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 1135. [2022-02-16 14:35:49,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 2.2742504409171076) internal successors, (2579), 1134 states have internal predecessors, (2579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:49,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 2579 transitions. [2022-02-16 14:35:49,827 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 2579 transitions. Word has length 26 [2022-02-16 14:35:49,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:49,827 INFO L470 AbstractCegarLoop]: Abstraction has 1135 states and 2579 transitions. [2022-02-16 14:35:49,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:49,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 2579 transitions. [2022-02-16 14:35:49,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:35:49,829 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:49,829 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:49,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-02-16 14:35:50,029 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 14:35:50,030 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:35:50,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:50,030 INFO L85 PathProgramCache]: Analyzing trace with hash 982723286, now seen corresponding path program 9 times [2022-02-16 14:35:50,030 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:50,030 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591072791] [2022-02-16 14:35:50,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:50,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:50,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:50,324 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 14:35:50,324 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:50,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591072791] [2022-02-16 14:35:50,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591072791] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:50,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804578717] [2022-02-16 14:35:50,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:35:50,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:50,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:50,326 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 14:35:50,327 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 14:35:50,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:35:50,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:35:50,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-16 14:35:50,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:50,754 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:35:50,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-02-16 14:35:51,038 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 14:35:51,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:51,362 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:35:51,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 71 [2022-02-16 14:35:52,649 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 14:35:52,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804578717] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:52,649 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:52,649 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 26 [2022-02-16 14:35:52,649 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687832432] [2022-02-16 14:35:52,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:52,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 14:35:52,650 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:52,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 14:35:52,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:35:52,650 INFO L87 Difference]: Start difference. First operand 1135 states and 2579 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:54,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:54,133 INFO L93 Difference]: Finished difference Result 1437 states and 3157 transitions. [2022-02-16 14:35:54,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-16 14:35:54,133 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:35:54,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:54,135 INFO L225 Difference]: With dead ends: 1437 [2022-02-16 14:35:54,135 INFO L226 Difference]: Without dead ends: 1427 [2022-02-16 14:35:54,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=443, Invalid=2209, Unknown=0, NotChecked=0, Total=2652 [2022-02-16 14:35:54,137 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 214 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:54,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 198 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 649 Invalid, 0 Unknown, 266 Unchecked, 0.3s Time] [2022-02-16 14:35:54,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2022-02-16 14:35:54,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1143. [2022-02-16 14:35:54,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1142 states have (on average 2.268826619964974) internal successors, (2591), 1142 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:54,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 2591 transitions. [2022-02-16 14:35:54,154 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 2591 transitions. Word has length 26 [2022-02-16 14:35:54,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:54,155 INFO L470 AbstractCegarLoop]: Abstraction has 1143 states and 2591 transitions. [2022-02-16 14:35:54,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:54,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 2591 transitions. [2022-02-16 14:35:54,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:35:54,156 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:54,156 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:54,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-02-16 14:35:54,356 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 14:35:54,357 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:35:54,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:54,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1592049050, now seen corresponding path program 10 times [2022-02-16 14:35:54,357 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:54,357 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323234298] [2022-02-16 14:35:54,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:54,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:54,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:54,634 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 14:35:54,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:54,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323234298] [2022-02-16 14:35:54,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323234298] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:54,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475118856] [2022-02-16 14:35:54,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:35:54,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:54,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:54,636 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 14:35:54,637 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 14:35:54,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:35:54,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:35:54,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-16 14:35:54,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:55,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:35:55,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:55,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-16 14:35:55,056 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 14:35:55,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:55,303 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-16 14:35:55,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 56 [2022-02-16 14:35:55,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:55,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:55,633 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:35:55,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-02-16 14:35:55,965 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 14:35:55,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475118856] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:55,965 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:55,965 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-16 14:35:55,965 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41165267] [2022-02-16 14:35:55,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:55,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 14:35:55,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:55,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 14:35:55,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-02-16 14:35:55,966 INFO L87 Difference]: Start difference. First operand 1143 states and 2591 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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 14:35:57,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:57,177 INFO L93 Difference]: Finished difference Result 1606 states and 3456 transitions. [2022-02-16 14:35:57,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-16 14:35:57,177 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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 26 [2022-02-16 14:35:57,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:57,179 INFO L225 Difference]: With dead ends: 1606 [2022-02-16 14:35:57,179 INFO L226 Difference]: Without dead ends: 1592 [2022-02-16 14:35:57,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=290, Invalid=1690, Unknown=0, NotChecked=0, Total=1980 [2022-02-16 14:35:57,181 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 177 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:57,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 200 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:35:57,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2022-02-16 14:35:57,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1146. [2022-02-16 14:35:57,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 2.274235807860262) internal successors, (2604), 1145 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:57,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 2604 transitions. [2022-02-16 14:35:57,203 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 2604 transitions. Word has length 26 [2022-02-16 14:35:57,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:57,203 INFO L470 AbstractCegarLoop]: Abstraction has 1146 states and 2604 transitions. [2022-02-16 14:35:57,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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 14:35:57,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 2604 transitions. [2022-02-16 14:35:57,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:35:57,205 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:57,205 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:57,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-02-16 14:35:57,416 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 14:35:57,416 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:35:57,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:57,416 INFO L85 PathProgramCache]: Analyzing trace with hash -608702818, now seen corresponding path program 11 times [2022-02-16 14:35:57,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:57,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891537391] [2022-02-16 14:35:57,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:57,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:57,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:57,706 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 14:35:57,707 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:57,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891537391] [2022-02-16 14:35:57,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891537391] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:57,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213000894] [2022-02-16 14:35:57,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:35:57,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:57,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:57,708 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 14:35:57,709 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 14:35:57,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:35:57,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:35:57,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 14:35:57,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:58,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:35:58,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:58,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-16 14:35:58,121 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 14:35:58,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:58,398 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-16 14:35:58,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 20 treesize of output 55 [2022-02-16 14:35:58,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:58,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:58,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:35:58,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-02-16 14:35:58,980 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 14:35:58,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213000894] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:58,981 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:58,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-16 14:35:58,981 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573381860] [2022-02-16 14:35:58,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:58,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:35:58,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:58,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:35:58,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:35:58,982 INFO L87 Difference]: Start difference. First operand 1146 states and 2604 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 14:35:59,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:59,882 INFO L93 Difference]: Finished difference Result 1600 states and 3422 transitions. [2022-02-16 14:35:59,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-16 14:35:59,883 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 26 [2022-02-16 14:35:59,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:59,885 INFO L225 Difference]: With dead ends: 1600 [2022-02-16 14:35:59,885 INFO L226 Difference]: Without dead ends: 1588 [2022-02-16 14:35:59,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=207, Invalid=1125, Unknown=0, NotChecked=0, Total=1332 [2022-02-16 14:35:59,886 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 136 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:59,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 179 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 786 Invalid, 0 Unknown, 46 Unchecked, 0.4s Time] [2022-02-16 14:35:59,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2022-02-16 14:35:59,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1164. [2022-02-16 14:35:59,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 1163 states have (on average 2.2656921754084265) internal successors, (2635), 1163 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:59,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 2635 transitions. [2022-02-16 14:35:59,901 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 2635 transitions. Word has length 26 [2022-02-16 14:35:59,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:59,901 INFO L470 AbstractCegarLoop]: Abstraction has 1164 states and 2635 transitions. [2022-02-16 14:35:59,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 14:35:59,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 2635 transitions. [2022-02-16 14:35:59,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:35:59,903 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:59,903 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:59,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-02-16 14:36:00,104 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 14:36:00,105 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:36:00,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:36:00,105 INFO L85 PathProgramCache]: Analyzing trace with hash -908829230, now seen corresponding path program 12 times [2022-02-16 14:36:00,105 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:36:00,105 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931023948] [2022-02-16 14:36:00,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:36:00,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:36:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:00,515 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 14:36:00,515 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:36:00,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931023948] [2022-02-16 14:36:00,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931023948] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:36:00,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340853607] [2022-02-16 14:36:00,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:36:00,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:00,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:36:00,517 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 14:36:00,547 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 14:36:00,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 14:36:00,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:36:00,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-16 14:36:00,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:36:00,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:00,928 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:36:00,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 14:36:01,015 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 14:36:01,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:36:01,331 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-16 14:36:01,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 56 [2022-02-16 14:36:01,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:01,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:01,640 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:36:01,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-02-16 14:36:02,005 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 14:36:02,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340853607] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:36:02,005 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:36:02,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-16 14:36:02,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699826089] [2022-02-16 14:36:02,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:36:02,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 14:36:02,006 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:36:02,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 14:36:02,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-02-16 14:36:02,007 INFO L87 Difference]: Start difference. First operand 1164 states and 2635 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:04,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:36:04,594 INFO L93 Difference]: Finished difference Result 1830 states and 3870 transitions. [2022-02-16 14:36:04,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-16 14:36:04,594 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:36:04,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:36:04,597 INFO L225 Difference]: With dead ends: 1830 [2022-02-16 14:36:04,597 INFO L226 Difference]: Without dead ends: 1813 [2022-02-16 14:36:04,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=801, Invalid=4601, Unknown=0, NotChecked=0, Total=5402 [2022-02-16 14:36:04,599 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 310 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:36:04,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 161 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:36:04,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2022-02-16 14:36:04,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 1197. [2022-02-16 14:36:04,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1196 states have (on average 2.259197324414716) internal successors, (2702), 1196 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:04,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 2702 transitions. [2022-02-16 14:36:04,617 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 2702 transitions. Word has length 26 [2022-02-16 14:36:04,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:36:04,617 INFO L470 AbstractCegarLoop]: Abstraction has 1197 states and 2702 transitions. [2022-02-16 14:36:04,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:04,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 2702 transitions. [2022-02-16 14:36:04,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:36:04,620 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:36:04,620 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:36:04,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-02-16 14:36:04,835 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 14:36:04,835 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:36:04,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:36:04,836 INFO L85 PathProgramCache]: Analyzing trace with hash -2064882602, now seen corresponding path program 13 times [2022-02-16 14:36:04,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:36:04,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811874891] [2022-02-16 14:36:04,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:36:04,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:36:04,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:05,155 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 14:36:05,156 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:36:05,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811874891] [2022-02-16 14:36:05,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811874891] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:36:05,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908616019] [2022-02-16 14:36:05,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:36:05,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:05,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:36:05,158 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 14:36:05,163 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 14:36:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:05,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 14:36:05,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:36:05,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:05,597 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:36:05,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2022-02-16 14:36:05,687 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 14:36:05,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:36:05,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:05,929 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:36:05,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 55 [2022-02-16 14:36:06,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:06,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:06,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:36:06,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-02-16 14:36:06,968 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 14:36:06,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908616019] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:36:06,969 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:36:06,969 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-16 14:36:06,969 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10245014] [2022-02-16 14:36:06,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:36:06,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 14:36:06,969 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:36:06,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 14:36:06,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-02-16 14:36:06,970 INFO L87 Difference]: Start difference. First operand 1197 states and 2702 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 14:36:09,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:36:09,391 INFO L93 Difference]: Finished difference Result 1932 states and 3988 transitions. [2022-02-16 14:36:09,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-16 14:36:09,392 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 26 [2022-02-16 14:36:09,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:36:09,394 INFO L225 Difference]: With dead ends: 1932 [2022-02-16 14:36:09,395 INFO L226 Difference]: Without dead ends: 1908 [2022-02-16 14:36:09,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=840, Invalid=3852, Unknown=0, NotChecked=0, Total=4692 [2022-02-16 14:36:09,396 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 353 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 251 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:36:09,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 224 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 754 Invalid, 0 Unknown, 251 Unchecked, 0.4s Time] [2022-02-16 14:36:09,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2022-02-16 14:36:09,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1224. [2022-02-16 14:36:09,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 2.2583810302534753) internal successors, (2762), 1223 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:09,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 2762 transitions. [2022-02-16 14:36:09,416 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 2762 transitions. Word has length 26 [2022-02-16 14:36:09,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:36:09,416 INFO L470 AbstractCegarLoop]: Abstraction has 1224 states and 2762 transitions. [2022-02-16 14:36:09,417 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 14:36:09,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 2762 transitions. [2022-02-16 14:36:09,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:36:09,418 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:36:09,418 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:36:09,434 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 14:36:09,619 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 14:36:09,619 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:36:09,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:36:09,619 INFO L85 PathProgramCache]: Analyzing trace with hash -144428454, now seen corresponding path program 15 times [2022-02-16 14:36:09,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:36:09,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242529392] [2022-02-16 14:36:09,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:36:09,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:36:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:10,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:10,037 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:36:10,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242529392] [2022-02-16 14:36:10,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242529392] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:36:10,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162168771] [2022-02-16 14:36:10,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:36:10,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:10,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:36:10,039 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 14:36:10,040 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 14:36:10,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:36:10,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:36:10,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-16 14:36:10,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:36:10,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:10,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:10,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:36:10,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2022-02-16 14:36:10,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:10,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:36:11,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:11,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:11,312 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:36:11,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 29 [2022-02-16 14:36:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:11,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162168771] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:36:11,472 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:36:11,472 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 32 [2022-02-16 14:36:11,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783900485] [2022-02-16 14:36:11,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:36:11,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:36:11,473 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:36:11,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:36:11,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:36:11,474 INFO L87 Difference]: Start difference. First operand 1224 states and 2762 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:12,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:36:12,831 INFO L93 Difference]: Finished difference Result 1397 states and 3116 transitions. [2022-02-16 14:36:12,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-16 14:36:12,832 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:36:12,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:36:12,834 INFO L225 Difference]: With dead ends: 1397 [2022-02-16 14:36:12,834 INFO L226 Difference]: Without dead ends: 1369 [2022-02-16 14:36:12,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=507, Invalid=3033, Unknown=0, NotChecked=0, Total=3540 [2022-02-16 14:36:12,835 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 137 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 487 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:36:12,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 181 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 432 Invalid, 0 Unknown, 487 Unchecked, 0.2s Time] [2022-02-16 14:36:12,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2022-02-16 14:36:12,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1230. [2022-02-16 14:36:12,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 2.256305939788446) internal successors, (2773), 1229 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:12,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 2773 transitions. [2022-02-16 14:36:12,847 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 2773 transitions. Word has length 26 [2022-02-16 14:36:12,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:36:12,847 INFO L470 AbstractCegarLoop]: Abstraction has 1230 states and 2773 transitions. [2022-02-16 14:36:12,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:12,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 2773 transitions. [2022-02-16 14:36:12,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:36:12,849 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:36:12,849 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:36:12,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-02-16 14:36:13,049 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 14:36:13,050 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:36:13,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:36:13,050 INFO L85 PathProgramCache]: Analyzing trace with hash -2008570082, now seen corresponding path program 16 times [2022-02-16 14:36:13,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:36:13,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400905837] [2022-02-16 14:36:13,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:36:13,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:36:13,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:13,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:13,362 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:36:13,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400905837] [2022-02-16 14:36:13,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400905837] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:36:13,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392727424] [2022-02-16 14:36:13,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:36:13,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:13,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:36:13,364 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 14:36:13,391 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 14:36:13,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:36:13,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:36:13,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-16 14:36:13,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:36:13,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:13,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:13,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:13,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-02-16 14:36:13,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:13,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:36:13,838 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:36:13,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22 treesize of output 47 [2022-02-16 14:36:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:14,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392727424] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:36:14,202 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:36:14,202 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-02-16 14:36:14,202 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988738695] [2022-02-16 14:36:14,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:36:14,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 14:36:14,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:36:14,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 14:36:14,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-02-16 14:36:14,203 INFO L87 Difference]: Start difference. First operand 1230 states and 2773 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:16,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:36:16,045 INFO L93 Difference]: Finished difference Result 1689 states and 3739 transitions. [2022-02-16 14:36:16,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-16 14:36:16,046 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:36:16,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:36:16,048 INFO L225 Difference]: With dead ends: 1689 [2022-02-16 14:36:16,048 INFO L226 Difference]: Without dead ends: 1677 [2022-02-16 14:36:16,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=607, Invalid=3815, Unknown=0, NotChecked=0, Total=4422 [2022-02-16 14:36:16,049 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 217 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:36:16,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 233 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 953 Invalid, 0 Unknown, 195 Unchecked, 0.4s Time] [2022-02-16 14:36:16,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2022-02-16 14:36:16,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1241. [2022-02-16 14:36:16,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 2.253225806451613) internal successors, (2794), 1240 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:16,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 2794 transitions. [2022-02-16 14:36:16,064 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 2794 transitions. Word has length 26 [2022-02-16 14:36:16,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:36:16,064 INFO L470 AbstractCegarLoop]: Abstraction has 1241 states and 2794 transitions. [2022-02-16 14:36:16,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:16,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 2794 transitions. [2022-02-16 14:36:16,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:36:16,067 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:36:16,067 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:36:16,083 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 14:36:16,270 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 14:36:16,270 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:36:16,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:36:16,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1938107238, now seen corresponding path program 14 times [2022-02-16 14:36:16,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:36:16,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736128027] [2022-02-16 14:36:16,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:36:16,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:36:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:16,507 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 14:36:16,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:36:16,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736128027] [2022-02-16 14:36:16,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736128027] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:36:16,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785157688] [2022-02-16 14:36:16,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:36:16,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:16,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:36:16,508 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 14:36:16,510 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 14:36:16,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:36:16,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:36:16,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-16 14:36:16,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:36:16,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:16,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:16,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-16 14:36:16,850 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 14:36:16,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:36:17,032 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-16 14:36:17,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 56 [2022-02-16 14:36:17,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:17,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:17,266 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:36:17,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-02-16 14:36:17,491 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 14:36:17,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785157688] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:36:17,491 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:36:17,491 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-16 14:36:17,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933136457] [2022-02-16 14:36:17,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:36:17,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 14:36:17,492 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:36:17,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 14:36:17,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-02-16 14:36:17,492 INFO L87 Difference]: Start difference. First operand 1241 states and 2794 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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 14:36:18,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:36:18,218 INFO L93 Difference]: Finished difference Result 1565 states and 3393 transitions. [2022-02-16 14:36:18,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 14:36:18,218 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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 26 [2022-02-16 14:36:18,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:36:18,220 INFO L225 Difference]: With dead ends: 1565 [2022-02-16 14:36:18,220 INFO L226 Difference]: Without dead ends: 1558 [2022-02-16 14:36:18,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2022-02-16 14:36:18,221 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 122 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:36:18,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 158 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:36:18,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2022-02-16 14:36:18,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 1241. [2022-02-16 14:36:18,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 2.253225806451613) internal successors, (2794), 1240 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:18,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 2794 transitions. [2022-02-16 14:36:18,235 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 2794 transitions. Word has length 26 [2022-02-16 14:36:18,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:36:18,235 INFO L470 AbstractCegarLoop]: Abstraction has 1241 states and 2794 transitions. [2022-02-16 14:36:18,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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 14:36:18,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 2794 transitions. [2022-02-16 14:36:18,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:36:18,237 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:36:18,237 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:36:18,253 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 14:36:18,437 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 14:36:18,438 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:36:18,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:36:18,438 INFO L85 PathProgramCache]: Analyzing trace with hash -400894506, now seen corresponding path program 15 times [2022-02-16 14:36:18,438 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:36:18,438 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924590925] [2022-02-16 14:36:18,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:36:18,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:36:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:18,686 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 14:36:18,687 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:36:18,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924590925] [2022-02-16 14:36:18,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924590925] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:36:18,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774761065] [2022-02-16 14:36:18,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:36:18,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:18,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:36:18,689 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 14:36:18,715 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 14:36:18,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:36:18,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:36:18,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 14:36:18,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:36:19,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:19,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:19,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-02-16 14:36:19,100 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 14:36:19,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:36:19,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:19,278 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:36:19,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 56 [2022-02-16 14:36:19,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:19,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:19,486 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:36:19,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-02-16 14:36:19,736 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 14:36:19,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774761065] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:36:19,736 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:36:19,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-16 14:36:19,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895324207] [2022-02-16 14:36:19,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:36:19,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 14:36:19,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:36:19,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 14:36:19,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-02-16 14:36:19,737 INFO L87 Difference]: Start difference. First operand 1241 states and 2794 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:20,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:36:20,963 INFO L93 Difference]: Finished difference Result 1676 states and 3580 transitions. [2022-02-16 14:36:20,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-16 14:36:20,963 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:36:20,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:36:20,965 INFO L225 Difference]: With dead ends: 1676 [2022-02-16 14:36:20,965 INFO L226 Difference]: Without dead ends: 1671 [2022-02-16 14:36:20,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=469, Invalid=2183, Unknown=0, NotChecked=0, Total=2652 [2022-02-16 14:36:20,966 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 198 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:36:20,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 148 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 640 Invalid, 0 Unknown, 45 Unchecked, 0.3s Time] [2022-02-16 14:36:20,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2022-02-16 14:36:20,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1253. [2022-02-16 14:36:20,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 2.2563897763578273) internal successors, (2825), 1252 states have internal predecessors, (2825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:20,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 2825 transitions. [2022-02-16 14:36:20,980 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 2825 transitions. Word has length 26 [2022-02-16 14:36:20,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:36:20,980 INFO L470 AbstractCegarLoop]: Abstraction has 1253 states and 2825 transitions. [2022-02-16 14:36:20,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:20,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 2825 transitions. [2022-02-16 14:36:20,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:36:20,981 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:36:20,982 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:36:20,997 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 14:36:21,182 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 14:36:21,182 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:36:21,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:36:21,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1458190486, now seen corresponding path program 16 times [2022-02-16 14:36:21,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:36:21,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927837571] [2022-02-16 14:36:21,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:36:21,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:36:21,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:21,433 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 14:36:21,433 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:36:21,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927837571] [2022-02-16 14:36:21,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927837571] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:36:21,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132114372] [2022-02-16 14:36:21,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:36:21,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:21,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:36:21,435 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 14:36:21,459 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 14:36:21,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:36:21,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:36:21,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-16 14:36:21,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:36:21,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:21,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:21,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-02-16 14:36:21,846 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 14:36:21,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:36:22,081 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-16 14:36:22,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 56 [2022-02-16 14:36:22,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:22,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:22,355 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:36:22,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-02-16 14:36:22,611 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 14:36:22,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132114372] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:36:22,611 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:36:22,611 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-16 14:36:22,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310359857] [2022-02-16 14:36:22,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:36:22,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 14:36:22,612 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:36:22,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 14:36:22,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-02-16 14:36:22,612 INFO L87 Difference]: Start difference. First operand 1253 states and 2825 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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 14:36:23,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:36:23,277 INFO L93 Difference]: Finished difference Result 1619 states and 3490 transitions. [2022-02-16 14:36:23,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-16 14:36:23,277 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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 26 [2022-02-16 14:36:23,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:36:23,279 INFO L225 Difference]: With dead ends: 1619 [2022-02-16 14:36:23,279 INFO L226 Difference]: Without dead ends: 1607 [2022-02-16 14:36:23,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2022-02-16 14:36:23,280 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 119 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:36:23,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 165 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:36:23,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2022-02-16 14:36:23,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1258. [2022-02-16 14:36:23,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1257 states have (on average 2.252983293556086) internal successors, (2832), 1257 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:23,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 2832 transitions. [2022-02-16 14:36:23,298 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 2832 transitions. Word has length 26 [2022-02-16 14:36:23,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:36:23,298 INFO L470 AbstractCegarLoop]: Abstraction has 1258 states and 2832 transitions. [2022-02-16 14:36:23,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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 14:36:23,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 2832 transitions. [2022-02-16 14:36:23,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:36:23,300 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:36:23,300 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:36:23,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-02-16 14:36:23,500 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 14:36:23,500 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:36:23,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:36:23,501 INFO L85 PathProgramCache]: Analyzing trace with hash 302137114, now seen corresponding path program 17 times [2022-02-16 14:36:23,501 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:36:23,501 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129453232] [2022-02-16 14:36:23,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:36:23,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:36:23,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:23,752 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 14:36:23,752 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:36:23,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129453232] [2022-02-16 14:36:23,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129453232] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:36:23,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416322373] [2022-02-16 14:36:23,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:36:23,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:23,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:36:23,756 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 14:36:23,757 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 14:36:23,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:36:23,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:36:23,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 14:36:23,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:36:24,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:24,108 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:36:24,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-02-16 14:36:24,213 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 14:36:24,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:36:24,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:24,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:24,499 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:36:24,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 48 [2022-02-16 14:36:24,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:24,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 5 [2022-02-16 14:36:24,750 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 14:36:24,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416322373] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:36:24,750 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:36:24,750 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 26 [2022-02-16 14:36:24,750 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267853347] [2022-02-16 14:36:24,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:36:24,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 14:36:24,751 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:36:24,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 14:36:24,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:36:24,751 INFO L87 Difference]: Start difference. First operand 1258 states and 2832 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 14:36:28,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:36:28,451 INFO L93 Difference]: Finished difference Result 1978 states and 4230 transitions. [2022-02-16 14:36:28,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-16 14:36:28,452 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 26 [2022-02-16 14:36:28,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:36:28,455 INFO L225 Difference]: With dead ends: 1978 [2022-02-16 14:36:28,455 INFO L226 Difference]: Without dead ends: 1966 [2022-02-16 14:36:28,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=983, Invalid=4567, Unknown=0, NotChecked=0, Total=5550 [2022-02-16 14:36:28,456 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 283 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:36:28,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 234 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1157 Invalid, 0 Unknown, 31 Unchecked, 0.6s Time] [2022-02-16 14:36:28,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2022-02-16 14:36:28,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1270. [2022-02-16 14:36:28,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 2.260047281323877) internal successors, (2868), 1269 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:28,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 2868 transitions. [2022-02-16 14:36:28,475 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 2868 transitions. Word has length 26 [2022-02-16 14:36:28,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:36:28,475 INFO L470 AbstractCegarLoop]: Abstraction has 1270 states and 2868 transitions. [2022-02-16 14:36:28,475 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 14:36:28,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 2868 transitions. [2022-02-16 14:36:28,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:36:28,476 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:36:28,477 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:36:28,494 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 14:36:28,677 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 14:36:28,677 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:36:28,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:36:28,678 INFO L85 PathProgramCache]: Analyzing trace with hash -188218022, now seen corresponding path program 17 times [2022-02-16 14:36:28,678 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:36:28,678 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473266641] [2022-02-16 14:36:28,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:36:28,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:36:28,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:29,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:29,024 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:36:29,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473266641] [2022-02-16 14:36:29,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473266641] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:36:29,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587992687] [2022-02-16 14:36:29,024 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:36:29,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:29,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:36:29,025 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 14:36:29,049 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 14:36:29,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:36:29,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:36:29,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 14:36:29,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:36:29,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:29,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:29,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:29,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-02-16 14:36:29,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:29,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:36:29,541 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:36:29,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22 treesize of output 47 [2022-02-16 14:36:29,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:29,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587992687] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:36:29,711 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:36:29,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-02-16 14:36:29,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765893919] [2022-02-16 14:36:29,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:36:29,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 14:36:29,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:36:29,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 14:36:29,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-02-16 14:36:29,712 INFO L87 Difference]: Start difference. First operand 1270 states and 2868 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:30,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:36:30,845 INFO L93 Difference]: Finished difference Result 1690 states and 3731 transitions. [2022-02-16 14:36:30,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-16 14:36:30,846 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:36:30,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:36:30,848 INFO L225 Difference]: With dead ends: 1690 [2022-02-16 14:36:30,848 INFO L226 Difference]: Without dead ends: 1678 [2022-02-16 14:36:30,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=429, Invalid=2433, Unknown=0, NotChecked=0, Total=2862 [2022-02-16 14:36:30,849 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 177 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:36:30,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 195 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:36:30,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2022-02-16 14:36:30,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1277. [2022-02-16 14:36:30,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1277 states, 1276 states have (on average 2.2586206896551726) internal successors, (2882), 1276 states have internal predecessors, (2882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:30,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 2882 transitions. [2022-02-16 14:36:30,868 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 2882 transitions. Word has length 26 [2022-02-16 14:36:30,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:36:30,868 INFO L470 AbstractCegarLoop]: Abstraction has 1277 states and 2882 transitions. [2022-02-16 14:36:30,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:30,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 2882 transitions. [2022-02-16 14:36:30,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:36:30,871 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:36:30,871 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:36:30,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-02-16 14:36:31,091 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 14:36:31,091 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:36:31,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:36:31,092 INFO L85 PathProgramCache]: Analyzing trace with hash -585222294, now seen corresponding path program 18 times [2022-02-16 14:36:31,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:36:31,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436040391] [2022-02-16 14:36:31,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:36:31,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:36:31,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:31,401 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:36:31,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436040391] [2022-02-16 14:36:31,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436040391] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:36:31,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960776713] [2022-02-16 14:36:31,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:36:31,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:31,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:36:31,403 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 14:36:31,403 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 14:36:31,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 14:36:31,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:36:31,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 14:36:31,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:36:31,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:31,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:31,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:31,774 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:36:31,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 47 [2022-02-16 14:36:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:31,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:36:32,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:32,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:32,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:32,112 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:36:32,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-02-16 14:36:32,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:32,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960776713] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:36:32,282 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:36:32,282 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-02-16 14:36:32,282 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119454714] [2022-02-16 14:36:32,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:36:32,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-16 14:36:32,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:36:32,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-16 14:36:32,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2022-02-16 14:36:32,283 INFO L87 Difference]: Start difference. First operand 1277 states and 2882 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:33,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:36:33,745 INFO L93 Difference]: Finished difference Result 1535 states and 3368 transitions. [2022-02-16 14:36:33,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-16 14:36:33,746 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:36:33,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:36:33,748 INFO L225 Difference]: With dead ends: 1535 [2022-02-16 14:36:33,748 INFO L226 Difference]: Without dead ends: 1506 [2022-02-16 14:36:33,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=673, Invalid=3487, Unknown=0, NotChecked=0, Total=4160 [2022-02-16 14:36:33,749 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 212 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:36:33,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 160 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 627 Invalid, 0 Unknown, 197 Unchecked, 0.3s Time] [2022-02-16 14:36:33,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-02-16 14:36:33,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1289. [2022-02-16 14:36:33,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1288 states have (on average 2.2569875776397517) internal successors, (2907), 1288 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:33,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 2907 transitions. [2022-02-16 14:36:33,763 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 2907 transitions. Word has length 26 [2022-02-16 14:36:33,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:36:33,763 INFO L470 AbstractCegarLoop]: Abstraction has 1289 states and 2907 transitions. [2022-02-16 14:36:33,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:33,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 2907 transitions. [2022-02-16 14:36:33,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:36:33,765 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:36:33,765 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:36:33,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-16 14:36:33,965 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 14:36:33,965 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:36:33,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:36:33,966 INFO L85 PathProgramCache]: Analyzing trace with hash -915805738, now seen corresponding path program 18 times [2022-02-16 14:36:33,966 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:36:33,966 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786840751] [2022-02-16 14:36:33,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:36:33,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:36:33,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:34,179 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 14:36:34,179 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:36:34,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786840751] [2022-02-16 14:36:34,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786840751] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:36:34,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619387544] [2022-02-16 14:36:34,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:36:34,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:34,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:36:34,180 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 14:36:34,182 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 14:36:34,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 14:36:34,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:36:34,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-16 14:36:34,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:36:34,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:34,595 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:36:34,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 30 [2022-02-16 14:36:34,749 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 14:36:34,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:36:35,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:35,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:35,056 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:36:35,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 55 [2022-02-16 14:36:35,472 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 14:36:35,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619387544] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:36:35,472 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:36:35,472 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-16 14:36:35,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127467382] [2022-02-16 14:36:35,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:36:35,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:36:35,473 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:36:35,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:36:35,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:36:35,473 INFO L87 Difference]: Start difference. First operand 1289 states and 2907 transitions. Second operand has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:38,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:36:38,126 INFO L93 Difference]: Finished difference Result 1708 states and 3737 transitions. [2022-02-16 14:36:38,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-16 14:36:38,127 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:36:38,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:36:38,129 INFO L225 Difference]: With dead ends: 1708 [2022-02-16 14:36:38,129 INFO L226 Difference]: Without dead ends: 1703 [2022-02-16 14:36:38,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1877 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=952, Invalid=5210, Unknown=0, NotChecked=0, Total=6162 [2022-02-16 14:36:38,131 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 240 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:36:38,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 218 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 652 Invalid, 0 Unknown, 313 Unchecked, 0.3s Time] [2022-02-16 14:36:38,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2022-02-16 14:36:38,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1307. [2022-02-16 14:36:38,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1306 states have (on average 2.254977029096478) internal successors, (2945), 1306 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:38,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 2945 transitions. [2022-02-16 14:36:38,146 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 2945 transitions. Word has length 26 [2022-02-16 14:36:38,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:36:38,147 INFO L470 AbstractCegarLoop]: Abstraction has 1307 states and 2945 transitions. [2022-02-16 14:36:38,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:38,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 2945 transitions. [2022-02-16 14:36:38,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:36:38,149 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:36:38,149 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:36:38,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-02-16 14:36:38,349 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 14:36:38,350 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:36:38,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:36:38,350 INFO L85 PathProgramCache]: Analyzing trace with hash -306479974, now seen corresponding path program 19 times [2022-02-16 14:36:38,350 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:36:38,350 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733881722] [2022-02-16 14:36:38,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:36:38,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:36:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:38,565 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 14:36:38,565 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:36:38,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733881722] [2022-02-16 14:36:38,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733881722] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:36:38,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886840805] [2022-02-16 14:36:38,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:36:38,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:38,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:36:38,566 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 14:36:38,567 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 14:36:38,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:38,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-16 14:36:38,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:36:38,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:38,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:38,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-16 14:36:39,001 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 14:36:39,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:36:39,216 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-16 14:36:39,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 56 [2022-02-16 14:36:39,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:39,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:39,572 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:36:39,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-02-16 14:36:40,063 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 14:36:40,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886840805] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:36:40,063 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:36:40,063 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-16 14:36:40,063 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121549086] [2022-02-16 14:36:40,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:36:40,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 14:36:40,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:36:40,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 14:36:40,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-02-16 14:36:40,064 INFO L87 Difference]: Start difference. First operand 1307 states and 2945 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:42,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:36:42,243 INFO L93 Difference]: Finished difference Result 2004 states and 4289 transitions. [2022-02-16 14:36:42,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-16 14:36:42,243 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:36:42,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:36:42,246 INFO L225 Difference]: With dead ends: 2004 [2022-02-16 14:36:42,246 INFO L226 Difference]: Without dead ends: 1998 [2022-02-16 14:36:42,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=593, Invalid=3189, Unknown=0, NotChecked=0, Total=3782 [2022-02-16 14:36:42,247 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 207 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:36:42,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 212 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:36:42,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2022-02-16 14:36:42,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1310. [2022-02-16 14:36:42,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 1309 states have (on average 2.2536287242169597) internal successors, (2950), 1309 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:42,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 2950 transitions. [2022-02-16 14:36:42,265 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 2950 transitions. Word has length 26 [2022-02-16 14:36:42,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:36:42,265 INFO L470 AbstractCegarLoop]: Abstraction has 1310 states and 2950 transitions. [2022-02-16 14:36:42,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:42,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 2950 transitions. [2022-02-16 14:36:42,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:36:42,266 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:36:42,267 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:36:42,283 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 14:36:42,467 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 14:36:42,468 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:36:42,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:36:42,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1787735454, now seen corresponding path program 20 times [2022-02-16 14:36:42,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:36:42,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707732703] [2022-02-16 14:36:42,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:36:42,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:36:42,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:42,764 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 14:36:42,764 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:36:42,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707732703] [2022-02-16 14:36:42,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707732703] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:36:42,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826899089] [2022-02-16 14:36:42,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:36:42,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:42,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:36:42,766 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 14:36:42,768 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 14:36:42,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:36:42,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:36:42,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-16 14:36:42,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:36:43,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:43,214 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:36:43,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 32 [2022-02-16 14:36:43,394 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 14:36:43,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:36:43,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:36:43,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 70 [2022-02-16 14:36:45,611 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 14:36:45,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826899089] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:36:45,612 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:36:45,612 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-16 14:36:45,612 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337663320] [2022-02-16 14:36:45,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:36:45,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 14:36:45,612 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:36:45,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 14:36:45,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-02-16 14:36:45,613 INFO L87 Difference]: Start difference. First operand 1310 states and 2950 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:46,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:36:46,914 INFO L93 Difference]: Finished difference Result 1694 states and 3647 transitions. [2022-02-16 14:36:46,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-16 14:36:46,915 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:36:46,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:36:46,918 INFO L225 Difference]: With dead ends: 1694 [2022-02-16 14:36:46,918 INFO L226 Difference]: Without dead ends: 1682 [2022-02-16 14:36:46,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=416, Invalid=1564, Unknown=0, NotChecked=0, Total=1980 [2022-02-16 14:36:46,918 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 209 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:36:46,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 125 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 490 Invalid, 0 Unknown, 198 Unchecked, 0.3s Time] [2022-02-16 14:36:46,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2022-02-16 14:36:46,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1314. [2022-02-16 14:36:46,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1313 states have (on average 2.2513328255902514) internal successors, (2956), 1313 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:46,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 2956 transitions. [2022-02-16 14:36:46,942 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 2956 transitions. Word has length 26 [2022-02-16 14:36:46,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:36:46,942 INFO L470 AbstractCegarLoop]: Abstraction has 1314 states and 2956 transitions. [2022-02-16 14:36:46,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:46,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 2956 transitions. [2022-02-16 14:36:46,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:36:46,944 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:36:46,944 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:36:46,969 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 14:36:47,160 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 14:36:47,161 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:36:47,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:36:47,161 INFO L85 PathProgramCache]: Analyzing trace with hash -162675810, now seen corresponding path program 21 times [2022-02-16 14:36:47,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:36:47,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408342881] [2022-02-16 14:36:47,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:36:47,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:36:47,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:47,413 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 14:36:47,413 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:36:47,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408342881] [2022-02-16 14:36:47,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408342881] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:36:47,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836481363] [2022-02-16 14:36:47,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:36:47,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:47,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:36:47,414 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 14:36:47,415 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 14:36:47,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:36:47,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:36:47,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-16 14:36:47,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:36:47,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:47,912 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:36:47,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2022-02-16 14:36:48,296 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 14:36:48,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:36:48,537 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:36:48,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 70 [2022-02-16 14:36:49,495 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 14:36:49,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836481363] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:36:49,496 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:36:49,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-16 14:36:49,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054537818] [2022-02-16 14:36:49,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:36:49,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:36:49,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:36:49,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:36:49,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:36:49,496 INFO L87 Difference]: Start difference. First operand 1314 states and 2956 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 14:36:50,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:36:50,884 INFO L93 Difference]: Finished difference Result 1712 states and 3685 transitions. [2022-02-16 14:36:50,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-16 14:36:50,884 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 26 [2022-02-16 14:36:50,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:36:50,886 INFO L225 Difference]: With dead ends: 1712 [2022-02-16 14:36:50,886 INFO L226 Difference]: Without dead ends: 1700 [2022-02-16 14:36:50,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=363, Invalid=1443, Unknown=0, NotChecked=0, Total=1806 [2022-02-16 14:36:50,887 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 206 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:36:50,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 92 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 280 Invalid, 0 Unknown, 274 Unchecked, 0.2s Time] [2022-02-16 14:36:50,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2022-02-16 14:36:50,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 1333. [2022-02-16 14:36:50,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 1332 states have (on average 2.2477477477477477) internal successors, (2994), 1332 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:50,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 2994 transitions. [2022-02-16 14:36:50,901 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 2994 transitions. Word has length 26 [2022-02-16 14:36:50,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:36:50,901 INFO L470 AbstractCegarLoop]: Abstraction has 1333 states and 2994 transitions. [2022-02-16 14:36:50,902 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 14:36:50,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 2994 transitions. [2022-02-16 14:36:50,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:36:50,903 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:36:50,903 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:36:50,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-02-16 14:36:51,104 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 14:36:51,104 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:36:51,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:36:51,105 INFO L85 PathProgramCache]: Analyzing trace with hash 870573974, now seen corresponding path program 22 times [2022-02-16 14:36:51,105 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:36:51,105 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615092845] [2022-02-16 14:36:51,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:36:51,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:36:51,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:51,259 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 14:36:51,260 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:36:51,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615092845] [2022-02-16 14:36:51,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615092845] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:36:51,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894342485] [2022-02-16 14:36:51,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:36:51,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:51,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:36:51,261 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 14:36:51,261 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 14:36:51,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:36:51,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:36:51,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-16 14:36:51,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:36:51,665 INFO L353 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2022-02-16 14:36:51,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 47 [2022-02-16 14:36:51,701 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 14:36:51,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:36:51,871 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:36:51,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 71 [2022-02-16 14:36:52,862 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 14:36:52,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894342485] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:36:52,863 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:36:52,863 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-16 14:36:52,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205020387] [2022-02-16 14:36:52,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:36:52,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 14:36:52,863 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:36:52,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 14:36:52,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:36:52,864 INFO L87 Difference]: Start difference. First operand 1333 states and 2994 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:53,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:36:53,542 INFO L93 Difference]: Finished difference Result 1495 states and 3291 transitions. [2022-02-16 14:36:53,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 14:36:53,543 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:36:53,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:36:53,545 INFO L225 Difference]: With dead ends: 1495 [2022-02-16 14:36:53,545 INFO L226 Difference]: Without dead ends: 1490 [2022-02-16 14:36:53,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=341, Invalid=1551, Unknown=0, NotChecked=0, Total=1892 [2022-02-16 14:36:53,545 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 109 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:36:53,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 130 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 244 Invalid, 0 Unknown, 202 Unchecked, 0.1s Time] [2022-02-16 14:36:53,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2022-02-16 14:36:53,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1337. [2022-02-16 14:36:53,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1336 states have (on average 2.252245508982036) internal successors, (3009), 1336 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:53,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 3009 transitions. [2022-02-16 14:36:53,559 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 3009 transitions. Word has length 26 [2022-02-16 14:36:53,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:36:53,559 INFO L470 AbstractCegarLoop]: Abstraction has 1337 states and 3009 transitions. [2022-02-16 14:36:53,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:53,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 3009 transitions. [2022-02-16 14:36:53,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:36:53,561 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:36:53,561 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:36:53,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-02-16 14:36:53,762 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 14:36:53,762 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:36:53,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:36:53,762 INFO L85 PathProgramCache]: Analyzing trace with hash 483673174, now seen corresponding path program 23 times [2022-02-16 14:36:53,762 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:36:53,762 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647455387] [2022-02-16 14:36:53,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:36:53,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:36:53,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:53,929 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 14:36:53,929 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:36:53,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647455387] [2022-02-16 14:36:53,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647455387] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:36:53,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329471654] [2022-02-16 14:36:53,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:36:53,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:53,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:36:53,930 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 14:36:53,959 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 14:36:53,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:36:53,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:36:53,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 14:36:53,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:36:54,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:54,246 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:36:54,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 34 [2022-02-16 14:36:54,408 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 14:36:54,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:36:54,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:54,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:54,634 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:36:54,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 48 [2022-02-16 14:36:54,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:54,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 5 [2022-02-16 14:36:54,881 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 14:36:54,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329471654] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:36:54,881 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:36:54,881 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-02-16 14:36:54,882 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148746663] [2022-02-16 14:36:54,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:36:54,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 14:36:54,882 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:36:54,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 14:36:54,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:36:54,882 INFO L87 Difference]: Start difference. First operand 1337 states and 3009 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:59,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:36:59,784 INFO L93 Difference]: Finished difference Result 2445 states and 5160 transitions. [2022-02-16 14:36:59,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-02-16 14:36:59,785 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:36:59,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:36:59,788 INFO L225 Difference]: With dead ends: 2445 [2022-02-16 14:36:59,788 INFO L226 Difference]: Without dead ends: 2427 [2022-02-16 14:36:59,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3484 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1747, Invalid=8153, Unknown=0, NotChecked=0, Total=9900 [2022-02-16 14:36:59,790 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 440 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-16 14:36:59,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 248 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1320 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-16 14:36:59,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2022-02-16 14:36:59,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 1403. [2022-02-16 14:36:59,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1403 states, 1402 states have (on average 2.2796005706134093) internal successors, (3196), 1402 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:59,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 3196 transitions. [2022-02-16 14:36:59,813 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 3196 transitions. Word has length 26 [2022-02-16 14:36:59,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:36:59,813 INFO L470 AbstractCegarLoop]: Abstraction has 1403 states and 3196 transitions. [2022-02-16 14:36:59,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:59,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 3196 transitions. [2022-02-16 14:36:59,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:36:59,815 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:36:59,816 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:36:59,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-02-16 14:37:00,016 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 14:37:00,016 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:37:00,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:37:00,017 INFO L85 PathProgramCache]: Analyzing trace with hash -285479398, now seen corresponding path program 24 times [2022-02-16 14:37:00,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:37:00,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309275023] [2022-02-16 14:37:00,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:37:00,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:37:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:00,197 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 14:37:00,198 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:37:00,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309275023] [2022-02-16 14:37:00,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309275023] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:37:00,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026057664] [2022-02-16 14:37:00,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:37:00,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:37:00,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:37:00,199 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 14:37:00,200 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 14:37:00,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 14:37:00,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:37:00,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-16 14:37:00,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:37:00,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:37:00,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:37:00,531 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:37:00,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 36 [2022-02-16 14:37:00,602 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 14:37:00,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:37:00,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:37:00,743 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:37:00,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 55 [2022-02-16 14:37:00,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:37:00,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:37:00,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:37:00,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-02-16 14:37:01,295 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 14:37:01,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026057664] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:37:01,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:37:01,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-16 14:37:01,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037362094] [2022-02-16 14:37:01,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:37:01,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 14:37:01,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:37:01,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 14:37:01,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2022-02-16 14:37:01,297 INFO L87 Difference]: Start difference. First operand 1403 states and 3196 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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 14:37:02,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:37:02,787 INFO L93 Difference]: Finished difference Result 1877 states and 4103 transitions. [2022-02-16 14:37:02,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-16 14:37:02,787 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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 26 [2022-02-16 14:37:02,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:37:02,789 INFO L225 Difference]: With dead ends: 1877 [2022-02-16 14:37:02,790 INFO L226 Difference]: Without dead ends: 1872 [2022-02-16 14:37:02,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=543, Invalid=2319, Unknown=0, NotChecked=0, Total=2862 [2022-02-16 14:37:02,790 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 190 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 327 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:37:02,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 158 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 531 Invalid, 0 Unknown, 327 Unchecked, 0.3s Time] [2022-02-16 14:37:02,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2022-02-16 14:37:02,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1423. [2022-02-16 14:37:02,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1423 states, 1422 states have (on average 2.2862165963431784) internal successors, (3251), 1422 states have internal predecessors, (3251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:02,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 3251 transitions. [2022-02-16 14:37:02,808 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 3251 transitions. Word has length 26 [2022-02-16 14:37:02,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:37:02,808 INFO L470 AbstractCegarLoop]: Abstraction has 1423 states and 3251 transitions. [2022-02-16 14:37:02,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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 14:37:02,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 3251 transitions. [2022-02-16 14:37:02,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:37:02,810 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:37:02,810 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:37:02,826 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 14:37:03,011 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 14:37:03,011 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:37:03,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:37:03,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1206269730, now seen corresponding path program 25 times [2022-02-16 14:37:03,012 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:37:03,012 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375637586] [2022-02-16 14:37:03,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:37:03,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:37:03,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:03,168 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 14:37:03,168 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:37:03,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375637586] [2022-02-16 14:37:03,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375637586] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:37:03,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325999908] [2022-02-16 14:37:03,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:37:03,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:37:03,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:37:03,169 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 14:37:03,171 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 14:37:03,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:03,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-16 14:37:03,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:37:03,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:37:03,459 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:37:03,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-02-16 14:37:03,527 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 14:37:03,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:37:03,680 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-16 14:37:03,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 20 treesize of output 55 [2022-02-16 14:37:03,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:37:03,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:37:03,949 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:37:03,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-02-16 14:37:04,330 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 14:37:04,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325999908] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:37:04,330 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:37:04,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-16 14:37:04,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226016602] [2022-02-16 14:37:04,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:37:04,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 14:37:04,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:37:04,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 14:37:04,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-02-16 14:37:04,331 INFO L87 Difference]: Start difference. First operand 1423 states and 3251 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 14:37:05,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:37:05,077 INFO L93 Difference]: Finished difference Result 1860 states and 4067 transitions. [2022-02-16 14:37:05,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-16 14:37:05,078 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 26 [2022-02-16 14:37:05,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:37:05,080 INFO L225 Difference]: With dead ends: 1860 [2022-02-16 14:37:05,081 INFO L226 Difference]: Without dead ends: 1851 [2022-02-16 14:37:05,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2022-02-16 14:37:05,081 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 129 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:37:05,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 241 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:37:05,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1851 states. [2022-02-16 14:37:05,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1851 to 1425. [2022-02-16 14:37:05,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1424 states have (on average 2.2851123595505616) internal successors, (3254), 1424 states have internal predecessors, (3254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:05,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 3254 transitions. [2022-02-16 14:37:05,099 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 3254 transitions. Word has length 26 [2022-02-16 14:37:05,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:37:05,100 INFO L470 AbstractCegarLoop]: Abstraction has 1425 states and 3254 transitions. [2022-02-16 14:37:05,100 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 14:37:05,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 3254 transitions. [2022-02-16 14:37:05,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:37:05,102 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:37:05,102 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:37:05,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-02-16 14:37:05,302 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 14:37:05,302 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:37:05,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:37:05,303 INFO L85 PathProgramCache]: Analyzing trace with hash -755801834, now seen corresponding path program 26 times [2022-02-16 14:37:05,303 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:37:05,303 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162890074] [2022-02-16 14:37:05,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:37:05,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:37:05,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:05,505 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 14:37:05,505 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:37:05,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162890074] [2022-02-16 14:37:05,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162890074] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:37:05,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874797730] [2022-02-16 14:37:05,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:37:05,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:37:05,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:37:05,507 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 14:37:05,509 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 14:37:05,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:37:05,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:37:05,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-16 14:37:05,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:37:06,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:37:06,008 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:37:06,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 33 [2022-02-16 14:37:06,193 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 14:37:06,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:37:06,423 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:37:06,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 71 [2022-02-16 14:37:08,023 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 14:37:08,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874797730] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:37:08,023 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:37:08,024 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-02-16 14:37:08,024 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009870872] [2022-02-16 14:37:08,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:37:08,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 14:37:08,024 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:37:08,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 14:37:08,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:37:08,024 INFO L87 Difference]: Start difference. First operand 1425 states and 3254 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:10,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:37:10,041 INFO L93 Difference]: Finished difference Result 1887 states and 4125 transitions. [2022-02-16 14:37:10,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-16 14:37:10,041 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:37:10,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:37:10,044 INFO L225 Difference]: With dead ends: 1887 [2022-02-16 14:37:10,044 INFO L226 Difference]: Without dead ends: 1875 [2022-02-16 14:37:10,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=568, Invalid=2738, Unknown=0, NotChecked=0, Total=3306 [2022-02-16 14:37:10,045 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 228 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 339 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:37:10,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 170 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 518 Invalid, 0 Unknown, 339 Unchecked, 0.3s Time] [2022-02-16 14:37:10,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2022-02-16 14:37:10,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1428. [2022-02-16 14:37:10,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 2.283812193412754) internal successors, (3259), 1427 states have internal predecessors, (3259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:10,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3259 transitions. [2022-02-16 14:37:10,060 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3259 transitions. Word has length 26 [2022-02-16 14:37:10,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:37:10,060 INFO L470 AbstractCegarLoop]: Abstraction has 1428 states and 3259 transitions. [2022-02-16 14:37:10,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:10,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3259 transitions. [2022-02-16 14:37:10,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:37:10,062 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:37:10,062 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:37:10,078 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 14:37:10,263 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 14:37:10,263 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:37:10,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:37:10,263 INFO L85 PathProgramCache]: Analyzing trace with hash -2095905962, now seen corresponding path program 27 times [2022-02-16 14:37:10,263 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:37:10,263 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355566661] [2022-02-16 14:37:10,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:37:10,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:37:10,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:10,458 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 14:37:10,458 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:37:10,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355566661] [2022-02-16 14:37:10,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355566661] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:37:10,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376817971] [2022-02-16 14:37:10,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:37:10,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:37:10,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:37:10,459 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 14:37:10,462 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 14:37:10,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:37:10,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:37:10,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-16 14:37:10,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:37:10,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:37:10,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:37:10,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 30 [2022-02-16 14:37:10,958 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 14:37:10,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:37:11,165 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:37:11,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 70 [2022-02-16 14:37:12,876 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 14:37:12,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376817971] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:37:12,876 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:37:12,877 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-16 14:37:12,877 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313166522] [2022-02-16 14:37:12,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:37:12,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 14:37:12,877 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:37:12,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 14:37:12,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-02-16 14:37:12,878 INFO L87 Difference]: Start difference. First operand 1428 states and 3259 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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 14:37:13,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:37:13,971 INFO L93 Difference]: Finished difference Result 1743 states and 3852 transitions. [2022-02-16 14:37:13,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-16 14:37:13,972 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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 26 [2022-02-16 14:37:13,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:37:13,974 INFO L225 Difference]: With dead ends: 1743 [2022-02-16 14:37:13,974 INFO L226 Difference]: Without dead ends: 1738 [2022-02-16 14:37:13,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=354, Invalid=1626, Unknown=0, NotChecked=0, Total=1980 [2022-02-16 14:37:13,975 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 117 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 439 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:37:13,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 147 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 322 Invalid, 0 Unknown, 439 Unchecked, 0.2s Time] [2022-02-16 14:37:13,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2022-02-16 14:37:13,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1434. [2022-02-16 14:37:13,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1433 states have (on average 2.286113049546406) internal successors, (3276), 1433 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:13,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 3276 transitions. [2022-02-16 14:37:13,993 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 3276 transitions. Word has length 26 [2022-02-16 14:37:13,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:37:13,993 INFO L470 AbstractCegarLoop]: Abstraction has 1434 states and 3276 transitions. [2022-02-16 14:37:13,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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 14:37:13,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 3276 transitions. [2022-02-16 14:37:13,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:37:13,995 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:37:13,995 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:37:14,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-02-16 14:37:14,196 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 14:37:14,196 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:37:14,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:37:14,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1278271002, now seen corresponding path program 28 times [2022-02-16 14:37:14,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:37:14,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629328200] [2022-02-16 14:37:14,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:37:14,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:37:14,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:14,450 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 14:37:14,450 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:37:14,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629328200] [2022-02-16 14:37:14,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629328200] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:37:14,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869689500] [2022-02-16 14:37:14,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:37:14,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:37:14,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:37:14,452 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 14:37:14,480 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 14:37:14,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:37:14,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:37:14,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-16 14:37:14,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:37:14,949 INFO L353 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-02-16 14:37:14,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 69 [2022-02-16 14:37:15,035 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 14:37:15,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:37:15,262 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-16 14:37:15,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 56 [2022-02-16 14:37:15,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:37:15,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:37:15,658 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:37:15,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-02-16 14:37:16,240 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 14:37:16,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869689500] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:37:16,240 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:37:16,240 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-16 14:37:16,241 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978429293] [2022-02-16 14:37:16,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:37:16,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 14:37:16,241 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:37:16,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 14:37:16,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-02-16 14:37:16,241 INFO L87 Difference]: Start difference. First operand 1434 states and 3276 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:18,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:37:18,968 INFO L93 Difference]: Finished difference Result 2275 states and 4839 transitions. [2022-02-16 14:37:18,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-16 14:37:18,968 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:37:18,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:37:18,971 INFO L225 Difference]: With dead ends: 2275 [2022-02-16 14:37:18,971 INFO L226 Difference]: Without dead ends: 2236 [2022-02-16 14:37:18,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1735 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=902, Invalid=5104, Unknown=0, NotChecked=0, Total=6006 [2022-02-16 14:37:18,973 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 333 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 1314 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:37:18,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 262 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1314 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 14:37:18,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2022-02-16 14:37:18,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 1461. [2022-02-16 14:37:18,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1460 states have (on average 2.286986301369863) internal successors, (3339), 1460 states have internal predecessors, (3339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:18,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 3339 transitions. [2022-02-16 14:37:18,992 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 3339 transitions. Word has length 26 [2022-02-16 14:37:18,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:37:18,992 INFO L470 AbstractCegarLoop]: Abstraction has 1461 states and 3339 transitions. [2022-02-16 14:37:18,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:18,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 3339 transitions. [2022-02-16 14:37:18,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:37:18,994 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:37:18,994 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:37:19,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-02-16 14:37:19,196 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 14:37:19,196 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:37:19,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:37:19,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1883912102, now seen corresponding path program 19 times [2022-02-16 14:37:19,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:37:19,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19702146] [2022-02-16 14:37:19,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:37:19,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:37:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:19,491 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:37:19,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19702146] [2022-02-16 14:37:19,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19702146] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:37:19,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654002840] [2022-02-16 14:37:19,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:37:19,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:37:19,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:37:19,492 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 14:37:19,494 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 14:37:19,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:19,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-16 14:37:19,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:37:19,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:37:19,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:37:19,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:37:19,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-02-16 14:37:19,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:19,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:37:20,002 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:37:20,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22 treesize of output 47 [2022-02-16 14:37:20,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:20,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654002840] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:37:20,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:37:20,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-02-16 14:37:20,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466623266] [2022-02-16 14:37:20,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:37:20,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 14:37:20,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:37:20,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 14:37:20,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-02-16 14:37:20,297 INFO L87 Difference]: Start difference. First operand 1461 states and 3339 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:21,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:37:21,160 INFO L93 Difference]: Finished difference Result 1669 states and 3697 transitions. [2022-02-16 14:37:21,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-16 14:37:21,161 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:37:21,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:37:21,163 INFO L225 Difference]: With dead ends: 1669 [2022-02-16 14:37:21,163 INFO L226 Difference]: Without dead ends: 1657 [2022-02-16 14:37:21,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=301, Invalid=1769, Unknown=0, NotChecked=0, Total=2070 [2022-02-16 14:37:21,164 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 181 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:37:21,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 180 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:37:21,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2022-02-16 14:37:21,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1474. [2022-02-16 14:37:21,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 2.2878479293957907) internal successors, (3370), 1473 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:21,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 3370 transitions. [2022-02-16 14:37:21,179 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 3370 transitions. Word has length 26 [2022-02-16 14:37:21,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:37:21,179 INFO L470 AbstractCegarLoop]: Abstraction has 1474 states and 3370 transitions. [2022-02-16 14:37:21,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:21,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 3370 transitions. [2022-02-16 14:37:21,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:37:21,182 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:37:21,182 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:37:21,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-02-16 14:37:21,382 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 14:37:21,383 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:37:21,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:37:21,383 INFO L85 PathProgramCache]: Analyzing trace with hash 546913566, now seen corresponding path program 20 times [2022-02-16 14:37:21,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:37:21,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488283780] [2022-02-16 14:37:21,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:37:21,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:37:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:21,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:21,737 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:37:21,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488283780] [2022-02-16 14:37:21,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488283780] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:37:21,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015573156] [2022-02-16 14:37:21,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:37:21,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:37:21,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:37:21,739 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 14:37:21,741 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 14:37:21,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:37:21,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:37:21,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-16 14:37:21,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:37:22,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:37:22,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:37:22,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:37:22,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:37:22,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-02-16 14:37:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:22,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:37:22,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:37:22,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:37:22,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:37:22,482 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:37:22,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-02-16 14:37:22,719 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:22,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015573156] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:37:22,719 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:37:22,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-16 14:37:22,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804097508] [2022-02-16 14:37:22,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:37:22,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:37:22,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:37:22,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:37:22,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:37:22,720 INFO L87 Difference]: Start difference. First operand 1474 states and 3370 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:24,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:37:24,256 INFO L93 Difference]: Finished difference Result 1925 states and 4277 transitions. [2022-02-16 14:37:24,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-16 14:37:24,256 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:37:24,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:37:24,259 INFO L225 Difference]: With dead ends: 1925 [2022-02-16 14:37:24,259 INFO L226 Difference]: Without dead ends: 1889 [2022-02-16 14:37:24,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1272 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=730, Invalid=3560, Unknown=0, NotChecked=0, Total=4290 [2022-02-16 14:37:24,260 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 203 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:37:24,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 272 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 769 Invalid, 0 Unknown, 165 Unchecked, 0.4s Time] [2022-02-16 14:37:24,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1889 states. [2022-02-16 14:37:24,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1889 to 1498. [2022-02-16 14:37:24,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1497 states have (on average 2.282565130260521) internal successors, (3417), 1497 states have internal predecessors, (3417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:24,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 3417 transitions. [2022-02-16 14:37:24,279 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 3417 transitions. Word has length 26 [2022-02-16 14:37:24,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:37:24,279 INFO L470 AbstractCegarLoop]: Abstraction has 1498 states and 3417 transitions. [2022-02-16 14:37:24,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:24,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 3417 transitions. [2022-02-16 14:37:24,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:37:24,281 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:37:24,281 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:37:24,297 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 14:37:24,482 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 14:37:24,482 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:37:24,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:37:24,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1110352866, now seen corresponding path program 21 times [2022-02-16 14:37:24,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:37:24,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810529165] [2022-02-16 14:37:24,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:37:24,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:37:24,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:24,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:24,774 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:37:24,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810529165] [2022-02-16 14:37:24,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810529165] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:37:24,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800955339] [2022-02-16 14:37:24,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:37:24,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:37:24,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:37:24,775 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 14:37:24,776 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 14:37:24,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:37:24,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:37:24,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-16 14:37:24,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:37:25,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:37:25,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:37:25,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:37:25,142 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:37:25,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 52 [2022-02-16 14:37:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:25,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:37:25,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:37:25,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:37:25,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:37:25,341 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:37:25,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-02-16 14:37:25,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:25,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800955339] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:37:25,452 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:37:25,452 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-16 14:37:25,452 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890867314] [2022-02-16 14:37:25,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:37:25,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:37:25,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:37:25,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:37:25,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:37:25,453 INFO L87 Difference]: Start difference. First operand 1498 states and 3417 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:26,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:37:26,111 INFO L93 Difference]: Finished difference Result 1720 states and 3846 transitions. [2022-02-16 14:37:26,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-16 14:37:26,112 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:37:26,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:37:26,114 INFO L225 Difference]: With dead ends: 1720 [2022-02-16 14:37:26,114 INFO L226 Difference]: Without dead ends: 1708 [2022-02-16 14:37:26,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=350, Invalid=1720, Unknown=0, NotChecked=0, Total=2070 [2022-02-16 14:37:26,115 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 119 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:37:26,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 126 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 659 Invalid, 0 Unknown, 380 Unchecked, 0.3s Time] [2022-02-16 14:37:26,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2022-02-16 14:37:26,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1503. [2022-02-16 14:37:26,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 2.280958721704394) internal successors, (3426), 1502 states have internal predecessors, (3426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:26,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 3426 transitions. [2022-02-16 14:37:26,130 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 3426 transitions. Word has length 26 [2022-02-16 14:37:26,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:37:26,131 INFO L470 AbstractCegarLoop]: Abstraction has 1503 states and 3426 transitions. [2022-02-16 14:37:26,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:26,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 3426 transitions. [2022-02-16 14:37:26,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:37:26,133 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:37:26,133 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:37:26,148 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 14:37:26,333 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 14:37:26,333 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:37:26,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:37:26,334 INFO L85 PathProgramCache]: Analyzing trace with hash 278449630, now seen corresponding path program 29 times [2022-02-16 14:37:26,334 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:37:26,334 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292125905] [2022-02-16 14:37:26,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:37:26,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:37:26,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:26,519 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 14:37:26,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:37:26,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292125905] [2022-02-16 14:37:26,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292125905] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:37:26,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410224799] [2022-02-16 14:37:26,520 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:37:26,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:37:26,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:37:26,524 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 14:37:26,525 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 14:37:26,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:37:26,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:37:26,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-16 14:37:26,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:37:26,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:37:26,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:37:26,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-16 14:37:26,906 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 14:37:26,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:37:27,080 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-16 14:37:27,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 56 [2022-02-16 14:37:27,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:37:27,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:37:27,223 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:37:27,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-02-16 14:37:27,496 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 14:37:27,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410224799] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:37:27,496 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:37:27,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-16 14:37:27,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596945743] [2022-02-16 14:37:27,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:37:27,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 14:37:27,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:37:27,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 14:37:27,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-02-16 14:37:27,497 INFO L87 Difference]: Start difference. First operand 1503 states and 3426 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:28,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:37:28,339 INFO L93 Difference]: Finished difference Result 1986 states and 4334 transitions. [2022-02-16 14:37:28,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 14:37:28,339 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:37:28,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:37:28,342 INFO L225 Difference]: With dead ends: 1986 [2022-02-16 14:37:28,342 INFO L226 Difference]: Without dead ends: 1980 [2022-02-16 14:37:28,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=289, Invalid=1517, Unknown=0, NotChecked=0, Total=1806 [2022-02-16 14:37:28,342 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 125 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:37:28,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 201 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 846 Invalid, 0 Unknown, 141 Unchecked, 0.4s Time] [2022-02-16 14:37:28,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2022-02-16 14:37:28,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1503. [2022-02-16 14:37:28,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 2.280958721704394) internal successors, (3426), 1502 states have internal predecessors, (3426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:28,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 3426 transitions. [2022-02-16 14:37:28,361 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 3426 transitions. Word has length 26 [2022-02-16 14:37:28,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:37:28,361 INFO L470 AbstractCegarLoop]: Abstraction has 1503 states and 3426 transitions. [2022-02-16 14:37:28,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:28,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 3426 transitions. [2022-02-16 14:37:28,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:37:28,363 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:37:28,363 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:37:28,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-02-16 14:37:28,563 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 14:37:28,563 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:37:28,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:37:28,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1662230250, now seen corresponding path program 30 times [2022-02-16 14:37:28,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:37:28,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128606729] [2022-02-16 14:37:28,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:37:28,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:37:28,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:28,722 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 14:37:28,722 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:37:28,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128606729] [2022-02-16 14:37:28,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128606729] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:37:28,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292864470] [2022-02-16 14:37:28,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:37:28,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:37:28,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:37:28,723 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 14:37:28,724 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 14:37:28,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 14:37:28,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:37:28,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-16 14:37:28,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:37:29,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:37:29,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:37:29,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-02-16 14:37:29,215 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 14:37:29,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:37:29,370 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:37:29,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 71 [2022-02-16 14:37:30,220 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 14:37:30,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292864470] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:37:30,221 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:37:30,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-16 14:37:30,221 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814435831] [2022-02-16 14:37:30,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:37:30,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 14:37:30,221 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:37:30,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 14:37:30,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2022-02-16 14:37:30,222 INFO L87 Difference]: Start difference. First operand 1503 states and 3426 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:32,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:37:32,126 INFO L93 Difference]: Finished difference Result 2141 states and 4612 transitions. [2022-02-16 14:37:32,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-16 14:37:32,127 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:37:32,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:37:32,130 INFO L225 Difference]: With dead ends: 2141 [2022-02-16 14:37:32,130 INFO L226 Difference]: Without dead ends: 2129 [2022-02-16 14:37:32,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=623, Invalid=2347, Unknown=0, NotChecked=0, Total=2970 [2022-02-16 14:37:32,130 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 225 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:37:32,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 178 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 502 Invalid, 0 Unknown, 178 Unchecked, 0.3s Time] [2022-02-16 14:37:32,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-02-16 14:37:32,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1519. [2022-02-16 14:37:32,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 2.2839262187088276) internal successors, (3467), 1518 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:32,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 3467 transitions. [2022-02-16 14:37:32,154 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 3467 transitions. Word has length 26 [2022-02-16 14:37:32,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:37:32,154 INFO L470 AbstractCegarLoop]: Abstraction has 1519 states and 3467 transitions. [2022-02-16 14:37:32,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:32,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 3467 transitions. [2022-02-16 14:37:32,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:37:32,157 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:37:32,157 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:37:32,181 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 14:37:32,379 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 14:37:32,379 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:37:32,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:37:32,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1784114574, now seen corresponding path program 31 times [2022-02-16 14:37:32,379 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:37:32,379 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435822405] [2022-02-16 14:37:32,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:37:32,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:37:32,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:32,571 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 14:37:32,571 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:37:32,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435822405] [2022-02-16 14:37:32,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435822405] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:37:32,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472360314] [2022-02-16 14:37:32,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:37:32,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:37:32,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:37:32,572 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 14:37:32,573 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 14:37:32,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:32,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-16 14:37:32,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:37:32,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:37:32,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:37:32,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-02-16 14:37:32,953 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 14:37:32,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:37:33,126 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-16 14:37:33,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 56 [2022-02-16 14:37:33,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:37:33,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:37:33,361 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:37:33,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-02-16 14:37:33,681 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 14:37:33,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472360314] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:37:33,681 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:37:33,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-16 14:37:33,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459065196] [2022-02-16 14:37:33,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:37:33,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 14:37:33,681 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:37:33,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 14:37:33,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-02-16 14:37:33,682 INFO L87 Difference]: Start difference. First operand 1519 states and 3467 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:35,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:37:35,056 INFO L93 Difference]: Finished difference Result 2073 states and 4527 transitions. [2022-02-16 14:37:35,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-16 14:37:35,056 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:37:35,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:37:35,059 INFO L225 Difference]: With dead ends: 2073 [2022-02-16 14:37:35,059 INFO L226 Difference]: Without dead ends: 2066 [2022-02-16 14:37:35,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=454, Invalid=2302, Unknown=0, NotChecked=0, Total=2756 [2022-02-16 14:37:35,059 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 155 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:37:35,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 160 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:37:35,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2022-02-16 14:37:35,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 1519. [2022-02-16 14:37:35,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 2.2839262187088276) internal successors, (3467), 1518 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:35,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 3467 transitions. [2022-02-16 14:37:35,075 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 3467 transitions. Word has length 26 [2022-02-16 14:37:35,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:37:35,075 INFO L470 AbstractCegarLoop]: Abstraction has 1519 states and 3467 transitions. [2022-02-16 14:37:35,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:35,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 3467 transitions. [2022-02-16 14:37:35,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:37:35,077 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:37:35,077 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:37:35,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-02-16 14:37:35,278 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 14:37:35,279 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:37:35,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:37:35,279 INFO L85 PathProgramCache]: Analyzing trace with hash -861233066, now seen corresponding path program 32 times [2022-02-16 14:37:35,279 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:37:35,279 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361980460] [2022-02-16 14:37:35,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:37:35,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:37:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:35,490 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 14:37:35,490 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:37:35,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361980460] [2022-02-16 14:37:35,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361980460] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:37:35,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464947697] [2022-02-16 14:37:35,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:37:35,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:37:35,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:37:35,492 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 14:37:35,515 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 14:37:35,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:37:35,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:37:35,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-16 14:37:35,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:37:35,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:37:35,903 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:37:35,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-02-16 14:37:35,987 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 14:37:35,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:37:36,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:37:36,151 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:37:36,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 55 [2022-02-16 14:37:36,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:37:36,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:37:36,389 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:37:36,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-02-16 14:37:36,789 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 14:37:36,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464947697] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:37:36,789 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:37:36,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-16 14:37:36,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187708179] [2022-02-16 14:37:36,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:37:36,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 14:37:36,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:37:36,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 14:37:36,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-02-16 14:37:36,791 INFO L87 Difference]: Start difference. First operand 1519 states and 3467 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:38,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:37:38,198 INFO L93 Difference]: Finished difference Result 1915 states and 4173 transitions. [2022-02-16 14:37:38,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-16 14:37:38,198 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:37:38,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:37:38,201 INFO L225 Difference]: With dead ends: 1915 [2022-02-16 14:37:38,201 INFO L226 Difference]: Without dead ends: 1903 [2022-02-16 14:37:38,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=515, Invalid=2241, Unknown=0, NotChecked=0, Total=2756 [2022-02-16 14:37:38,202 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 233 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:37:38,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 121 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 505 Invalid, 0 Unknown, 108 Unchecked, 0.3s Time] [2022-02-16 14:37:38,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1903 states. [2022-02-16 14:37:38,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1903 to 1524. [2022-02-16 14:37:38,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1524 states, 1523 states have (on average 2.281680892974393) internal successors, (3475), 1523 states have internal predecessors, (3475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:38,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 3475 transitions. [2022-02-16 14:37:38,218 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 3475 transitions. Word has length 26 [2022-02-16 14:37:38,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:37:38,218 INFO L470 AbstractCegarLoop]: Abstraction has 1524 states and 3475 transitions. [2022-02-16 14:37:38,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:38,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 3475 transitions. [2022-02-16 14:37:38,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:37:38,219 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:37:38,220 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:37:38,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-02-16 14:37:38,427 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 14:37:38,427 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:37:38,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:37:38,428 INFO L85 PathProgramCache]: Analyzing trace with hash 166339530, now seen corresponding path program 33 times [2022-02-16 14:37:38,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:37:38,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111825926] [2022-02-16 14:37:38,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:37:38,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:37:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:38,659 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 14:37:38,659 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:37:38,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111825926] [2022-02-16 14:37:38,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111825926] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:37:38,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972826653] [2022-02-16 14:37:38,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:37:38,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:37:38,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:37:38,661 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 14:37:38,687 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 14:37:38,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:37:38,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:37:38,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-16 14:37:38,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:37:39,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:37:39,009 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:37:39,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 14:37:39,069 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 14:37:39,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:37:39,254 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-16 14:37:39,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 56 [2022-02-16 14:37:39,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:37:39,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:37:39,455 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:37:39,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-02-16 14:37:39,789 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 14:37:39,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972826653] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:37:39,790 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:37:39,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-16 14:37:39,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268830444] [2022-02-16 14:37:39,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:37:39,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 14:37:39,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:37:39,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 14:37:39,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-02-16 14:37:39,790 INFO L87 Difference]: Start difference. First operand 1524 states and 3475 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:41,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:37:41,486 INFO L93 Difference]: Finished difference Result 1995 states and 4355 transitions. [2022-02-16 14:37:41,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-16 14:37:41,487 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:37:41,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:37:41,489 INFO L225 Difference]: With dead ends: 1995 [2022-02-16 14:37:41,490 INFO L226 Difference]: Without dead ends: 1988 [2022-02-16 14:37:41,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=566, Invalid=3094, Unknown=0, NotChecked=0, Total=3660 [2022-02-16 14:37:41,490 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 190 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:37:41,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 201 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:37:41,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2022-02-16 14:37:41,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1524. [2022-02-16 14:37:41,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1524 states, 1523 states have (on average 2.2803676953381484) internal successors, (3473), 1523 states have internal predecessors, (3473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:41,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 3473 transitions. [2022-02-16 14:37:41,506 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 3473 transitions. Word has length 26 [2022-02-16 14:37:41,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:37:41,506 INFO L470 AbstractCegarLoop]: Abstraction has 1524 states and 3473 transitions. [2022-02-16 14:37:41,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:41,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 3473 transitions. [2022-02-16 14:37:41,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:37:41,507 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:37:41,508 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:37:41,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-02-16 14:37:41,716 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 14:37:41,716 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:37:41,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:37:41,717 INFO L85 PathProgramCache]: Analyzing trace with hash -989713842, now seen corresponding path program 34 times [2022-02-16 14:37:41,717 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:37:41,717 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064596733] [2022-02-16 14:37:41,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:37:41,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:37:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:41,959 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 14:37:41,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:37:41,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064596733] [2022-02-16 14:37:41,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064596733] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:37:41,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921271799] [2022-02-16 14:37:41,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:37:41,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:37:41,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:37:41,961 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 14:37:41,961 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 14:37:41,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:37:41,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:37:41,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-16 14:37:41,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:37:42,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:37:42,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:37:42,296 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:37:42,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 34 [2022-02-16 14:37:42,389 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 14:37:42,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:37:42,611 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-16 14:37:42,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 56 [2022-02-16 14:37:42,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:37:42,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:37:42,889 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:37:42,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-02-16 14:37:43,478 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 14:37:43,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921271799] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:37:43,478 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:37:43,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-16 14:37:43,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634657828] [2022-02-16 14:37:43,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:37:43,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 14:37:43,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:37:43,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 14:37:43,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2022-02-16 14:37:43,479 INFO L87 Difference]: Start difference. First operand 1524 states and 3473 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:45,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:37:45,106 INFO L93 Difference]: Finished difference Result 2151 states and 4645 transitions. [2022-02-16 14:37:45,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-16 14:37:45,107 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:37:45,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:37:45,110 INFO L225 Difference]: With dead ends: 2151 [2022-02-16 14:37:45,110 INFO L226 Difference]: Without dead ends: 2127 [2022-02-16 14:37:45,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=548, Invalid=2644, Unknown=0, NotChecked=0, Total=3192 [2022-02-16 14:37:45,111 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 239 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:37:45,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 179 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:37:45,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2022-02-16 14:37:45,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 1528. [2022-02-16 14:37:45,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1527 states have (on average 2.280943025540275) internal successors, (3483), 1527 states have internal predecessors, (3483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:45,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 3483 transitions. [2022-02-16 14:37:45,131 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 3483 transitions. Word has length 26 [2022-02-16 14:37:45,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:37:45,131 INFO L470 AbstractCegarLoop]: Abstraction has 1528 states and 3483 transitions. [2022-02-16 14:37:45,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:45,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 3483 transitions. [2022-02-16 14:37:45,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:37:45,132 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:37:45,132 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:37:45,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-02-16 14:37:45,333 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 14:37:45,333 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:37:45,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:37:45,333 INFO L85 PathProgramCache]: Analyzing trace with hash 2077320222, now seen corresponding path program 22 times [2022-02-16 14:37:45,333 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:37:45,333 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219925242] [2022-02-16 14:37:45,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:37:45,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:37:45,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:45,663 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:45,663 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:37:45,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219925242] [2022-02-16 14:37:45,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219925242] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:37:45,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666542331] [2022-02-16 14:37:45,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:37:45,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:37:45,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:37:45,664 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 14:37:45,664 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 14:37:45,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:37:45,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:37:45,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-16 14:37:45,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:37:45,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-16 14:37:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:46,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:37:46,102 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:37:46,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22 treesize of output 47 [2022-02-16 14:37:46,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:46,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666542331] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:37:46,328 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:37:46,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-02-16 14:37:46,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103932754] [2022-02-16 14:37:46,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:37:46,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 14:37:46,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:37:46,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 14:37:46,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-02-16 14:37:46,329 INFO L87 Difference]: Start difference. First operand 1528 states and 3483 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:46,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:37:46,673 INFO L93 Difference]: Finished difference Result 1565 states and 3537 transitions. [2022-02-16 14:37:46,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 14:37:46,673 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:37:46,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:37:46,675 INFO L225 Difference]: With dead ends: 1565 [2022-02-16 14:37:46,676 INFO L226 Difference]: Without dead ends: 1560 [2022-02-16 14:37:46,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:37:46,676 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 75 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:37:46,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 123 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 309 Invalid, 0 Unknown, 67 Unchecked, 0.1s Time] [2022-02-16 14:37:46,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2022-02-16 14:37:46,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1531. [2022-02-16 14:37:46,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 2.281045751633987) internal successors, (3490), 1530 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:46,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 3490 transitions. [2022-02-16 14:37:46,694 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 3490 transitions. Word has length 26 [2022-02-16 14:37:46,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:37:46,694 INFO L470 AbstractCegarLoop]: Abstraction has 1531 states and 3490 transitions. [2022-02-16 14:37:46,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:46,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 3490 transitions. [2022-02-16 14:37:46,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:37:46,696 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:37:46,696 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:37:46,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-02-16 14:37:46,896 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 14:37:46,897 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:37:46,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:37:46,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1501309406, now seen corresponding path program 23 times [2022-02-16 14:37:46,897 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:37:46,897 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416126313] [2022-02-16 14:37:46,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:37:46,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:37:46,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:47,224 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:37:47,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416126313] [2022-02-16 14:37:47,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416126313] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:37:47,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768788001] [2022-02-16 14:37:47,224 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:37:47,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:37:47,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:37:47,225 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 14:37:47,226 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 14:37:47,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:37:47,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:37:47,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-16 14:37:47,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:37:47,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-16 14:37:47,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:47,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:37:47,746 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:37:47,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22 treesize of output 47 [2022-02-16 14:37:48,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:48,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768788001] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:37:48,005 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:37:48,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-02-16 14:37:48,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502687969] [2022-02-16 14:37:48,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:37:48,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 14:37:48,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:37:48,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 14:37:48,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-02-16 14:37:48,006 INFO L87 Difference]: Start difference. First operand 1531 states and 3490 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:48,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:37:48,715 INFO L93 Difference]: Finished difference Result 1861 states and 4166 transitions. [2022-02-16 14:37:48,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 14:37:48,716 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:37:48,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:37:48,718 INFO L225 Difference]: With dead ends: 1861 [2022-02-16 14:37:48,718 INFO L226 Difference]: Without dead ends: 1843 [2022-02-16 14:37:48,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=301, Invalid=1591, Unknown=0, NotChecked=0, Total=1892 [2022-02-16 14:37:48,719 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 131 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:37:48,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 136 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:37:48,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1843 states. [2022-02-16 14:37:48,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1843 to 1537. [2022-02-16 14:37:48,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 2.279296875) internal successors, (3501), 1536 states have internal predecessors, (3501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:48,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 3501 transitions. [2022-02-16 14:37:48,735 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 3501 transitions. Word has length 26 [2022-02-16 14:37:48,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:37:48,736 INFO L470 AbstractCegarLoop]: Abstraction has 1537 states and 3501 transitions. [2022-02-16 14:37:48,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:48,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 3501 transitions. [2022-02-16 14:37:48,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:37:48,737 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:37:48,737 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:37:48,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-02-16 14:37:48,938 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 14:37:48,938 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:37:48,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:37:48,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1330432786, now seen corresponding path program 24 times [2022-02-16 14:37:48,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:37:48,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045822234] [2022-02-16 14:37:48,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:37:48,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:37:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:49,372 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:37:49,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045822234] [2022-02-16 14:37:49,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045822234] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:37:49,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395324855] [2022-02-16 14:37:49,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:37:49,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:37:49,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:37:49,374 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 14:37:49,398 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 14:37:49,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 14:37:49,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:37:49,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-16 14:37:49,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:37:49,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-02-16 14:37:49,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:49,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:37:49,851 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:37:49,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22 treesize of output 47 [2022-02-16 14:37:50,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:50,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395324855] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:37:50,040 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:37:50,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-02-16 14:37:50,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205256110] [2022-02-16 14:37:50,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:37:50,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 14:37:50,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:37:50,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 14:37:50,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-02-16 14:37:50,041 INFO L87 Difference]: Start difference. First operand 1537 states and 3501 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:51,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:37:51,374 INFO L93 Difference]: Finished difference Result 1978 states and 4463 transitions. [2022-02-16 14:37:51,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-16 14:37:51,374 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:37:51,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:37:51,377 INFO L225 Difference]: With dead ends: 1978 [2022-02-16 14:37:51,377 INFO L226 Difference]: Without dead ends: 1966 [2022-02-16 14:37:51,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=516, Invalid=2676, Unknown=0, NotChecked=0, Total=3192 [2022-02-16 14:37:51,377 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 130 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:37:51,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 167 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:37:51,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2022-02-16 14:37:51,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1541. [2022-02-16 14:37:51,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1541 states, 1540 states have (on average 2.277922077922078) internal successors, (3508), 1540 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:51,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1541 states to 1541 states and 3508 transitions. [2022-02-16 14:37:51,396 INFO L78 Accepts]: Start accepts. Automaton has 1541 states and 3508 transitions. Word has length 26 [2022-02-16 14:37:51,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:37:51,396 INFO L470 AbstractCegarLoop]: Abstraction has 1541 states and 3508 transitions. [2022-02-16 14:37:51,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:51,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states and 3508 transitions. [2022-02-16 14:37:51,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:37:51,397 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:37:51,397 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:37:51,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-02-16 14:37:51,598 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 14:37:51,598 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:37:51,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:37:51,598 INFO L85 PathProgramCache]: Analyzing trace with hash -39591056, now seen corresponding path program 35 times [2022-02-16 14:37:51,598 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:37:51,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675383518] [2022-02-16 14:37:51,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:37:51,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:37:51,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:51,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:51,653 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:37:51,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675383518] [2022-02-16 14:37:51,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675383518] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:37:51,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996136602] [2022-02-16 14:37:51,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:37:51,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:37:51,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:37:51,654 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 14:37:51,655 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 14:37:51,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:37:51,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:37:51,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:37:51,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:37:51,803 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:51,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:37:51,949 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:51,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996136602] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:37:51,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:37:51,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-16 14:37:51,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274778155] [2022-02-16 14:37:51,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:37:51,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:37:51,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:37:51,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:37:51,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:37:51,951 INFO L87 Difference]: Start difference. First operand 1541 states and 3508 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:54,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:37:54,070 INFO L93 Difference]: Finished difference Result 3620 states and 7356 transitions. [2022-02-16 14:37:54,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-02-16 14:37:54,071 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-16 14:37:54,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:37:54,076 INFO L225 Difference]: With dead ends: 3620 [2022-02-16 14:37:54,076 INFO L226 Difference]: Without dead ends: 3620 [2022-02-16 14:37:54,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5608 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2680, Invalid=11362, Unknown=0, NotChecked=0, Total=14042 [2022-02-16 14:37:54,078 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 484 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 1749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-16 14:37:54,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 596 Invalid, 1749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1623 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-16 14:37:54,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3620 states. [2022-02-16 14:37:54,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3620 to 1785. [2022-02-16 14:37:54,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 2.3492152466367715) internal successors, (4191), 1784 states have internal predecessors, (4191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:54,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 4191 transitions. [2022-02-16 14:37:54,107 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 4191 transitions. Word has length 28 [2022-02-16 14:37:54,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:37:54,107 INFO L470 AbstractCegarLoop]: Abstraction has 1785 states and 4191 transitions. [2022-02-16 14:37:54,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:54,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 4191 transitions. [2022-02-16 14:37:54,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:37:54,109 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:37:54,109 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:37:54,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-02-16 14:37:54,310 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 14:37:54,310 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:37:54,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:37:54,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1889338640, now seen corresponding path program 25 times [2022-02-16 14:37:54,310 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:37:54,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196769434] [2022-02-16 14:37:54,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:37:54,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:37:54,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:54,390 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:37:54,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196769434] [2022-02-16 14:37:54,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196769434] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:37:54,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804811062] [2022-02-16 14:37:54,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:37:54,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:37:54,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:37:54,391 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 14:37:54,394 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 14:37:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:54,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:37:54,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:37:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:54,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:37:54,738 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:54,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804811062] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:37:54,738 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:37:54,738 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-16 14:37:54,738 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704039097] [2022-02-16 14:37:54,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:37:54,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 14:37:54,739 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:37:54,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 14:37:54,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-02-16 14:37:54,739 INFO L87 Difference]: Start difference. First operand 1785 states and 4191 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 14:37:56,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:37:56,070 INFO L93 Difference]: Finished difference Result 4023 states and 8552 transitions. [2022-02-16 14:37:56,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-16 14:37:56,070 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 28 [2022-02-16 14:37:56,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:37:56,076 INFO L225 Difference]: With dead ends: 4023 [2022-02-16 14:37:56,076 INFO L226 Difference]: Without dead ends: 4023 [2022-02-16 14:37:56,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2229 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1231, Invalid=5249, Unknown=0, NotChecked=0, Total=6480 [2022-02-16 14:37:56,077 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 418 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:37:56,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 364 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:37:56,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4023 states. [2022-02-16 14:37:56,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4023 to 1841. [2022-02-16 14:37:56,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 2.3342391304347827) internal successors, (4295), 1840 states have internal predecessors, (4295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:56,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 4295 transitions. [2022-02-16 14:37:56,109 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 4295 transitions. Word has length 28 [2022-02-16 14:37:56,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:37:56,109 INFO L470 AbstractCegarLoop]: Abstraction has 1841 states and 4295 transitions. [2022-02-16 14:37:56,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 14:37:56,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 4295 transitions. [2022-02-16 14:37:56,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:37:56,111 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:37:56,111 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:37:56,126 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 14:37:56,311 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 14:37:56,311 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:37:56,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:37:56,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1289099312, now seen corresponding path program 36 times [2022-02-16 14:37:56,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:37:56,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277386478] [2022-02-16 14:37:56,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:37:56,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:37:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:56,370 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:56,370 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:37:56,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277386478] [2022-02-16 14:37:56,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277386478] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:37:56,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22173085] [2022-02-16 14:37:56,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:37:56,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:37:56,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:37:56,372 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 14:37:56,399 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 14:37:56,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:37:56,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:37:56,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:37:56,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:37:56,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:56,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:37:56,756 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:56,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22173085] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:37:56,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:37:56,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-16 14:37:56,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125083904] [2022-02-16 14:37:56,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:37:56,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 14:37:56,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:37:56,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 14:37:56,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-02-16 14:37:56,757 INFO L87 Difference]: Start difference. First operand 1841 states and 4295 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:00,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:00,984 INFO L93 Difference]: Finished difference Result 4980 states and 9961 transitions. [2022-02-16 14:38:00,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-02-16 14:38:00,984 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-16 14:38:00,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:00,990 INFO L225 Difference]: With dead ends: 4980 [2022-02-16 14:38:00,990 INFO L226 Difference]: Without dead ends: 4980 [2022-02-16 14:38:00,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17220 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7033, Invalid=31579, Unknown=0, NotChecked=0, Total=38612 [2022-02-16 14:38:00,992 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 848 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 1920 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 2132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:00,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 629 Invalid, 2132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1920 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-16 14:38:00,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4980 states. [2022-02-16 14:38:01,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4980 to 1859. [2022-02-16 14:38:01,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1858 states have (on average 2.3347685683530677) internal successors, (4338), 1858 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:01,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 4338 transitions. [2022-02-16 14:38:01,027 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 4338 transitions. Word has length 28 [2022-02-16 14:38:01,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:01,027 INFO L470 AbstractCegarLoop]: Abstraction has 1859 states and 4338 transitions. [2022-02-16 14:38:01,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:01,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 4338 transitions. [2022-02-16 14:38:01,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:01,029 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:01,029 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:01,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-02-16 14:38:01,230 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 14:38:01,230 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:01,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:01,231 INFO L85 PathProgramCache]: Analyzing trace with hash -232014156, now seen corresponding path program 37 times [2022-02-16 14:38:01,231 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:01,231 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031946494] [2022-02-16 14:38:01,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:01,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:01,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:38:01,277 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:01,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031946494] [2022-02-16 14:38:01,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031946494] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:01,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132029389] [2022-02-16 14:38:01,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:38:01,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:01,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:01,278 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 14:38:01,279 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 14:38:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:01,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:38:01,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:38:01,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:01,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:38:01,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132029389] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:01,457 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:01,457 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-02-16 14:38:01,457 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609512007] [2022-02-16 14:38:01,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:01,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 14:38:01,458 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:01,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 14:38:01,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-02-16 14:38:01,458 INFO L87 Difference]: Start difference. First operand 1859 states and 4338 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 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 14:38:01,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:01,649 INFO L93 Difference]: Finished difference Result 3209 states and 7124 transitions. [2022-02-16 14:38:01,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 14:38:01,650 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 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 28 [2022-02-16 14:38:01,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:01,654 INFO L225 Difference]: With dead ends: 3209 [2022-02-16 14:38:01,654 INFO L226 Difference]: Without dead ends: 3206 [2022-02-16 14:38:01,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2022-02-16 14:38:01,655 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 297 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:01,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 57 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:38:01,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3206 states. [2022-02-16 14:38:01,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3206 to 2351. [2022-02-16 14:38:01,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 2350 states have (on average 2.4191489361702128) internal successors, (5685), 2350 states have internal predecessors, (5685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:01,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 5685 transitions. [2022-02-16 14:38:01,685 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 5685 transitions. Word has length 28 [2022-02-16 14:38:01,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:01,685 INFO L470 AbstractCegarLoop]: Abstraction has 2351 states and 5685 transitions. [2022-02-16 14:38:01,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 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 14:38:01,685 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 5685 transitions. [2022-02-16 14:38:01,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:01,688 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:01,688 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:01,704 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 14:38:01,889 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 14:38:01,889 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:01,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:01,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1959416432, now seen corresponding path program 38 times [2022-02-16 14:38:01,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:01,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547419020] [2022-02-16 14:38:01,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:01,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:01,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:01,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:01,934 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:01,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547419020] [2022-02-16 14:38:01,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547419020] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:01,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891467605] [2022-02-16 14:38:01,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:38:01,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:01,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:01,940 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 14:38:01,966 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 14:38:01,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:38:01,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:01,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-16 14:38:01,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:02,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:02,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:02,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:02,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891467605] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:02,183 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:02,183 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 14:38:02,186 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399677121] [2022-02-16 14:38:02,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:02,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 14:38:02,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:02,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 14:38:02,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-02-16 14:38:02,187 INFO L87 Difference]: Start difference. First operand 2351 states and 5685 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 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 14:38:03,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:03,562 INFO L93 Difference]: Finished difference Result 4596 states and 9981 transitions. [2022-02-16 14:38:03,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-02-16 14:38:03,562 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 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 28 [2022-02-16 14:38:03,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:03,569 INFO L225 Difference]: With dead ends: 4596 [2022-02-16 14:38:03,569 INFO L226 Difference]: Without dead ends: 4584 [2022-02-16 14:38:03,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3662 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2193, Invalid=7313, Unknown=0, NotChecked=0, Total=9506 [2022-02-16 14:38:03,570 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 592 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:03,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [592 Valid, 181 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:38:03,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4584 states. [2022-02-16 14:38:03,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4584 to 2819. [2022-02-16 14:38:03,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2819 states, 2818 states have (on average 2.50638750887154) internal successors, (7063), 2818 states have internal predecessors, (7063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:03,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 7063 transitions. [2022-02-16 14:38:03,614 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 7063 transitions. Word has length 28 [2022-02-16 14:38:03,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:03,615 INFO L470 AbstractCegarLoop]: Abstraction has 2819 states and 7063 transitions. [2022-02-16 14:38:03,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 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 14:38:03,615 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 7063 transitions. [2022-02-16 14:38:03,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:03,618 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:03,618 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:03,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-02-16 14:38:03,819 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 14:38:03,819 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:03,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:03,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1826518544, now seen corresponding path program 26 times [2022-02-16 14:38:03,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:03,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531704957] [2022-02-16 14:38:03,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:03,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:03,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:03,874 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:03,874 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:03,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531704957] [2022-02-16 14:38:03,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531704957] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:03,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446307934] [2022-02-16 14:38:03,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:38:03,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:03,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:03,875 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 14:38:03,876 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 14:38:03,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:38:03,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:03,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:38:03,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:04,013 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:04,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:04,073 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:04,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446307934] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:04,073 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:04,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 14:38:04,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402776248] [2022-02-16 14:38:04,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:04,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 14:38:04,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:04,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 14:38:04,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-02-16 14:38:04,074 INFO L87 Difference]: Start difference. First operand 2819 states and 7063 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 14:38:04,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:04,585 INFO L93 Difference]: Finished difference Result 5268 states and 12577 transitions. [2022-02-16 14:38:04,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-16 14:38:04,586 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 28 [2022-02-16 14:38:04,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:04,593 INFO L225 Difference]: With dead ends: 5268 [2022-02-16 14:38:04,593 INFO L226 Difference]: Without dead ends: 5248 [2022-02-16 14:38:04,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=579, Invalid=1773, Unknown=0, NotChecked=0, Total=2352 [2022-02-16 14:38:04,593 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 370 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:04,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 159 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:38:04,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5248 states. [2022-02-16 14:38:04,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5248 to 3799. [2022-02-16 14:38:04,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3799 states, 3798 states have (on average 2.528436018957346) internal successors, (9603), 3798 states have internal predecessors, (9603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:04,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3799 states to 3799 states and 9603 transitions. [2022-02-16 14:38:04,649 INFO L78 Accepts]: Start accepts. Automaton has 3799 states and 9603 transitions. Word has length 28 [2022-02-16 14:38:04,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:04,649 INFO L470 AbstractCegarLoop]: Abstraction has 3799 states and 9603 transitions. [2022-02-16 14:38:04,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 14:38:04,649 INFO L276 IsEmpty]: Start isEmpty. Operand 3799 states and 9603 transitions. [2022-02-16 14:38:04,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:04,654 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:04,655 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:04,670 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 14:38:04,855 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 14:38:04,855 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:04,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:04,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1886232332, now seen corresponding path program 39 times [2022-02-16 14:38:04,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:04,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922296153] [2022-02-16 14:38:04,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:04,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:04,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:04,885 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:04,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922296153] [2022-02-16 14:38:04,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922296153] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:04,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156156596] [2022-02-16 14:38:04,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:38:04,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:04,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:04,886 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 14:38:04,887 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 14:38:04,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:38:04,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:04,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:38:04,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:04,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:04,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:05,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:05,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156156596] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:05,090 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:05,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 14 [2022-02-16 14:38:05,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846472411] [2022-02-16 14:38:05,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:05,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 14:38:05,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:05,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 14:38:05,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-02-16 14:38:05,091 INFO L87 Difference]: Start difference. First operand 3799 states and 9603 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 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 14:38:05,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:05,476 INFO L93 Difference]: Finished difference Result 6057 states and 13843 transitions. [2022-02-16 14:38:05,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-16 14:38:05,477 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 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 28 [2022-02-16 14:38:05,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:05,487 INFO L225 Difference]: With dead ends: 6057 [2022-02-16 14:38:05,487 INFO L226 Difference]: Without dead ends: 6057 [2022-02-16 14:38:05,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=464, Invalid=868, Unknown=0, NotChecked=0, Total=1332 [2022-02-16 14:38:05,488 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 292 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:05,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 100 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:38:05,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6057 states. [2022-02-16 14:38:05,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6057 to 3404. [2022-02-16 14:38:05,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3404 states, 3403 states have (on average 2.5019100793417572) internal successors, (8514), 3403 states have internal predecessors, (8514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:05,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3404 states to 3404 states and 8514 transitions. [2022-02-16 14:38:05,559 INFO L78 Accepts]: Start accepts. Automaton has 3404 states and 8514 transitions. Word has length 28 [2022-02-16 14:38:05,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:05,560 INFO L470 AbstractCegarLoop]: Abstraction has 3404 states and 8514 transitions. [2022-02-16 14:38:05,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 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 14:38:05,560 INFO L276 IsEmpty]: Start isEmpty. Operand 3404 states and 8514 transitions. [2022-02-16 14:38:05,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:05,565 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:05,565 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:05,581 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 14:38:05,765 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 14:38:05,765 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:05,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:05,766 INFO L85 PathProgramCache]: Analyzing trace with hash -476253640, now seen corresponding path program 40 times [2022-02-16 14:38:05,766 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:05,766 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977297317] [2022-02-16 14:38:05,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:05,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:05,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:05,810 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:05,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977297317] [2022-02-16 14:38:05,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977297317] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:05,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446331139] [2022-02-16 14:38:05,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:38:05,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:05,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:05,811 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 14:38:05,811 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 14:38:05,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:38:05,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:05,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:38:05,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:05,927 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:05,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:06,028 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:06,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446331139] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:06,029 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:06,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 17 [2022-02-16 14:38:06,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981897482] [2022-02-16 14:38:06,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:06,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 14:38:06,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:06,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 14:38:06,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-02-16 14:38:06,029 INFO L87 Difference]: Start difference. First operand 3404 states and 8514 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 14:38:06,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:06,966 INFO L93 Difference]: Finished difference Result 6016 states and 13540 transitions. [2022-02-16 14:38:06,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-16 14:38:06,966 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 28 [2022-02-16 14:38:06,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:06,974 INFO L225 Difference]: With dead ends: 6016 [2022-02-16 14:38:06,974 INFO L226 Difference]: Without dead ends: 6016 [2022-02-16 14:38:06,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1887 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1272, Invalid=4130, Unknown=0, NotChecked=0, Total=5402 [2022-02-16 14:38:06,975 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 386 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:06,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 280 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:38:06,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6016 states. [2022-02-16 14:38:07,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6016 to 3419. [2022-02-16 14:38:07,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3419 states, 3418 states have (on average 2.500292568753657) internal successors, (8546), 3418 states have internal predecessors, (8546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:07,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3419 states to 3419 states and 8546 transitions. [2022-02-16 14:38:07,037 INFO L78 Accepts]: Start accepts. Automaton has 3419 states and 8546 transitions. Word has length 28 [2022-02-16 14:38:07,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:07,037 INFO L470 AbstractCegarLoop]: Abstraction has 3419 states and 8546 transitions. [2022-02-16 14:38:07,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 14:38:07,037 INFO L276 IsEmpty]: Start isEmpty. Operand 3419 states and 8546 transitions. [2022-02-16 14:38:07,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:07,041 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:07,041 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:07,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-02-16 14:38:07,242 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 14:38:07,242 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:07,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:07,243 INFO L85 PathProgramCache]: Analyzing trace with hash -65114252, now seen corresponding path program 41 times [2022-02-16 14:38:07,243 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:07,243 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203624893] [2022-02-16 14:38:07,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:07,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:07,285 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:07,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203624893] [2022-02-16 14:38:07,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203624893] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:07,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631964368] [2022-02-16 14:38:07,285 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:38:07,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:07,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:07,286 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 14:38:07,287 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 14:38:07,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:38:07,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:07,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-16 14:38:07,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:07,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:07,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:07,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:07,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631964368] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:07,482 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:07,482 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 14:38:07,482 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028826925] [2022-02-16 14:38:07,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:07,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 14:38:07,482 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:07,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 14:38:07,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-02-16 14:38:07,483 INFO L87 Difference]: Start difference. First operand 3419 states and 8546 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 14:38:08,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:08,598 INFO L93 Difference]: Finished difference Result 7290 states and 15682 transitions. [2022-02-16 14:38:08,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-16 14:38:08,598 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2022-02-16 14:38:08,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:08,608 INFO L225 Difference]: With dead ends: 7290 [2022-02-16 14:38:08,608 INFO L226 Difference]: Without dead ends: 7274 [2022-02-16 14:38:08,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2800 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1614, Invalid=5526, Unknown=0, NotChecked=0, Total=7140 [2022-02-16 14:38:08,609 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 578 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:08,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 215 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:38:08,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7274 states. [2022-02-16 14:38:08,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7274 to 3558. [2022-02-16 14:38:08,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3558 states, 3557 states have (on average 2.5021085184143943) internal successors, (8900), 3557 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:08,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3558 states to 3558 states and 8900 transitions. [2022-02-16 14:38:08,677 INFO L78 Accepts]: Start accepts. Automaton has 3558 states and 8900 transitions. Word has length 28 [2022-02-16 14:38:08,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:08,678 INFO L470 AbstractCegarLoop]: Abstraction has 3558 states and 8900 transitions. [2022-02-16 14:38:08,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 14:38:08,678 INFO L276 IsEmpty]: Start isEmpty. Operand 3558 states and 8900 transitions. [2022-02-16 14:38:08,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:08,682 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:08,682 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:08,709 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 14:38:08,895 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 14:38:08,895 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:08,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:08,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1377200012, now seen corresponding path program 42 times [2022-02-16 14:38:08,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:08,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369845972] [2022-02-16 14:38:08,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:08,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:08,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:08,938 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:08,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369845972] [2022-02-16 14:38:08,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369845972] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:08,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122809593] [2022-02-16 14:38:08,938 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:38:08,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:08,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:08,939 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 14:38:08,966 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 14:38:08,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 14:38:08,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:08,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-16 14:38:08,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:09,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:09,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:09,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:09,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122809593] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:09,153 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:09,153 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 14:38:09,153 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565645983] [2022-02-16 14:38:09,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:09,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 14:38:09,153 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:09,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 14:38:09,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-02-16 14:38:09,153 INFO L87 Difference]: Start difference. First operand 3558 states and 8900 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 14:38:10,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:10,317 INFO L93 Difference]: Finished difference Result 8770 states and 18688 transitions. [2022-02-16 14:38:10,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-16 14:38:10,317 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2022-02-16 14:38:10,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:10,330 INFO L225 Difference]: With dead ends: 8770 [2022-02-16 14:38:10,331 INFO L226 Difference]: Without dead ends: 8770 [2022-02-16 14:38:10,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2960 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1720, Invalid=5590, Unknown=0, NotChecked=0, Total=7310 [2022-02-16 14:38:10,332 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 544 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:10,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 252 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:38:10,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8770 states. [2022-02-16 14:38:10,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8770 to 3832. [2022-02-16 14:38:10,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3832 states, 3831 states have (on average 2.5403288958496475) internal successors, (9732), 3831 states have internal predecessors, (9732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:10,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3832 states to 3832 states and 9732 transitions. [2022-02-16 14:38:10,423 INFO L78 Accepts]: Start accepts. Automaton has 3832 states and 9732 transitions. Word has length 28 [2022-02-16 14:38:10,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:10,423 INFO L470 AbstractCegarLoop]: Abstraction has 3832 states and 9732 transitions. [2022-02-16 14:38:10,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 14:38:10,423 INFO L276 IsEmpty]: Start isEmpty. Operand 3832 states and 9732 transitions. [2022-02-16 14:38:10,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:10,428 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:10,428 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:10,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-02-16 14:38:10,628 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 14:38:10,628 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:10,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:10,628 INFO L85 PathProgramCache]: Analyzing trace with hash -705662024, now seen corresponding path program 43 times [2022-02-16 14:38:10,629 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:10,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35140017] [2022-02-16 14:38:10,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:10,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:10,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:10,671 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:10,671 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:10,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35140017] [2022-02-16 14:38:10,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35140017] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:10,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105033521] [2022-02-16 14:38:10,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:38:10,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:10,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:10,672 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 14:38:10,673 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 14:38:10,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:10,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:38:10,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:10,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:10,879 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:10,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105033521] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:10,880 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:10,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 17 [2022-02-16 14:38:10,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260033081] [2022-02-16 14:38:10,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:10,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 14:38:10,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:10,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 14:38:10,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-02-16 14:38:10,880 INFO L87 Difference]: Start difference. First operand 3832 states and 9732 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 14:38:11,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:11,791 INFO L93 Difference]: Finished difference Result 6643 states and 15023 transitions. [2022-02-16 14:38:11,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-16 14:38:11,791 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 28 [2022-02-16 14:38:11,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:11,801 INFO L225 Difference]: With dead ends: 6643 [2022-02-16 14:38:11,801 INFO L226 Difference]: Without dead ends: 6642 [2022-02-16 14:38:11,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1062, Invalid=3768, Unknown=0, NotChecked=0, Total=4830 [2022-02-16 14:38:11,803 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 372 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:11,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 271 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:38:11,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6642 states. [2022-02-16 14:38:11,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6642 to 3837. [2022-02-16 14:38:11,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3837 states, 3836 states have (on average 2.5417101147028154) internal successors, (9750), 3836 states have internal predecessors, (9750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:11,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3837 states to 3837 states and 9750 transitions. [2022-02-16 14:38:11,882 INFO L78 Accepts]: Start accepts. Automaton has 3837 states and 9750 transitions. Word has length 28 [2022-02-16 14:38:11,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:11,882 INFO L470 AbstractCegarLoop]: Abstraction has 3837 states and 9750 transitions. [2022-02-16 14:38:11,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 14:38:11,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3837 states and 9750 transitions. [2022-02-16 14:38:11,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:11,888 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:11,888 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:11,912 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 14:38:12,110 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 14:38:12,110 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:12,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:12,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1780386436, now seen corresponding path program 44 times [2022-02-16 14:38:12,111 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:12,111 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343212378] [2022-02-16 14:38:12,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:12,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:12,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:12,160 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:12,161 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:12,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343212378] [2022-02-16 14:38:12,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343212378] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:12,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925541392] [2022-02-16 14:38:12,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:38:12,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:12,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:12,162 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 14:38:12,173 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 14:38:12,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:38:12,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:12,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:38:12,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:12,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:12,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:12,408 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:12,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925541392] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:12,408 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:12,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-02-16 14:38:12,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020203286] [2022-02-16 14:38:12,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:12,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 14:38:12,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:12,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 14:38:12,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-02-16 14:38:12,409 INFO L87 Difference]: Start difference. First operand 3837 states and 9750 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 14:38:13,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:13,901 INFO L93 Difference]: Finished difference Result 9569 states and 21576 transitions. [2022-02-16 14:38:13,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-02-16 14:38:13,902 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 28 [2022-02-16 14:38:13,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:13,916 INFO L225 Difference]: With dead ends: 9569 [2022-02-16 14:38:13,916 INFO L226 Difference]: Without dead ends: 9568 [2022-02-16 14:38:13,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3624 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2169, Invalid=7337, Unknown=0, NotChecked=0, Total=9506 [2022-02-16 14:38:13,918 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 570 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:13,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 396 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 14:38:13,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9568 states. [2022-02-16 14:38:14,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9568 to 4203. [2022-02-16 14:38:14,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4203 states, 4202 states have (on average 2.566872917658258) internal successors, (10786), 4202 states have internal predecessors, (10786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:14,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4203 states to 4203 states and 10786 transitions. [2022-02-16 14:38:14,036 INFO L78 Accepts]: Start accepts. Automaton has 4203 states and 10786 transitions. Word has length 28 [2022-02-16 14:38:14,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:14,036 INFO L470 AbstractCegarLoop]: Abstraction has 4203 states and 10786 transitions. [2022-02-16 14:38:14,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 14:38:14,036 INFO L276 IsEmpty]: Start isEmpty. Operand 4203 states and 10786 transitions. [2022-02-16 14:38:14,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:14,043 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:14,043 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:14,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-02-16 14:38:14,243 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 14:38:14,243 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:14,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:14,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1717145810, now seen corresponding path program 45 times [2022-02-16 14:38:14,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:14,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728709432] [2022-02-16 14:38:14,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:14,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:14,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:14,290 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:14,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728709432] [2022-02-16 14:38:14,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728709432] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:14,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446783110] [2022-02-16 14:38:14,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:38:14,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:14,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:14,291 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 14:38:14,295 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 14:38:14,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-16 14:38:14,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:14,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:38:14,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:14,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:14,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:14,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:14,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446783110] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:14,551 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:14,551 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-02-16 14:38:14,551 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261429340] [2022-02-16 14:38:14,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:14,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 14:38:14,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:14,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 14:38:14,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-02-16 14:38:14,552 INFO L87 Difference]: Start difference. First operand 4203 states and 10786 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 14:38:16,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:16,349 INFO L93 Difference]: Finished difference Result 7976 states and 18093 transitions. [2022-02-16 14:38:16,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-02-16 14:38:16,349 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 28 [2022-02-16 14:38:16,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:16,361 INFO L225 Difference]: With dead ends: 7976 [2022-02-16 14:38:16,362 INFO L226 Difference]: Without dead ends: 7976 [2022-02-16 14:38:16,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6071 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2823, Invalid=11939, Unknown=0, NotChecked=0, Total=14762 [2022-02-16 14:38:16,364 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 517 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:16,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 403 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:38:16,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7976 states. [2022-02-16 14:38:16,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7976 to 4213. [2022-02-16 14:38:16,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4213 states, 4212 states have (on average 2.5641025641025643) internal successors, (10800), 4212 states have internal predecessors, (10800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:16,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4213 states to 4213 states and 10800 transitions. [2022-02-16 14:38:16,454 INFO L78 Accepts]: Start accepts. Automaton has 4213 states and 10800 transitions. Word has length 28 [2022-02-16 14:38:16,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:16,454 INFO L470 AbstractCegarLoop]: Abstraction has 4213 states and 10800 transitions. [2022-02-16 14:38:16,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 14:38:16,454 INFO L276 IsEmpty]: Start isEmpty. Operand 4213 states and 10800 transitions. [2022-02-16 14:38:16,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:16,459 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:16,459 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:16,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-02-16 14:38:16,659 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 14:38:16,659 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:16,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:16,660 INFO L85 PathProgramCache]: Analyzing trace with hash 2009710520, now seen corresponding path program 27 times [2022-02-16 14:38:16,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:16,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821328826] [2022-02-16 14:38:16,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:16,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:16,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:16,710 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:16,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821328826] [2022-02-16 14:38:16,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821328826] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:16,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794604271] [2022-02-16 14:38:16,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:38:16,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:16,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:16,711 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 14:38:16,714 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 14:38:16,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:38:16,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:16,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:38:16,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:16,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:16,929 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:16,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794604271] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:16,929 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:16,930 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-16 14:38:16,930 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956024196] [2022-02-16 14:38:16,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:16,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 14:38:16,930 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:16,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 14:38:16,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-02-16 14:38:16,931 INFO L87 Difference]: Start difference. First operand 4213 states and 10800 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 14:38:17,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:17,859 INFO L93 Difference]: Finished difference Result 7868 states and 18562 transitions. [2022-02-16 14:38:17,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-16 14:38:17,859 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 28 [2022-02-16 14:38:17,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:17,872 INFO L225 Difference]: With dead ends: 7868 [2022-02-16 14:38:17,872 INFO L226 Difference]: Without dead ends: 7868 [2022-02-16 14:38:17,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=974, Invalid=3856, Unknown=0, NotChecked=0, Total=4830 [2022-02-16 14:38:17,873 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 358 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:17,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 236 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:38:17,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7868 states. [2022-02-16 14:38:17,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7868 to 4221. [2022-02-16 14:38:17,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4221 states, 4220 states have (on average 2.5627962085308056) internal successors, (10815), 4220 states have internal predecessors, (10815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:17,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4221 states to 4221 states and 10815 transitions. [2022-02-16 14:38:17,960 INFO L78 Accepts]: Start accepts. Automaton has 4221 states and 10815 transitions. Word has length 28 [2022-02-16 14:38:17,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:17,960 INFO L470 AbstractCegarLoop]: Abstraction has 4221 states and 10815 transitions. [2022-02-16 14:38:17,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 14:38:17,961 INFO L276 IsEmpty]: Start isEmpty. Operand 4221 states and 10815 transitions. [2022-02-16 14:38:17,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:17,967 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:17,967 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:17,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-02-16 14:38:18,174 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 14:38:18,174 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:18,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:18,175 INFO L85 PathProgramCache]: Analyzing trace with hash -922465864, now seen corresponding path program 28 times [2022-02-16 14:38:18,175 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:18,175 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714063223] [2022-02-16 14:38:18,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:18,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:18,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:18,247 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:18,247 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:18,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714063223] [2022-02-16 14:38:18,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714063223] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:18,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315095003] [2022-02-16 14:38:18,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:38:18,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:18,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:18,249 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 14:38:18,263 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 14:38:18,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:38:18,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:18,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:38:18,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:18,384 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:18,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:18,474 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:18,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315095003] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:18,474 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:18,475 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-16 14:38:18,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794129539] [2022-02-16 14:38:18,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:18,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 14:38:18,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:18,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 14:38:18,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-02-16 14:38:18,475 INFO L87 Difference]: Start difference. First operand 4221 states and 10815 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 14:38:19,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:19,571 INFO L93 Difference]: Finished difference Result 7941 states and 18650 transitions. [2022-02-16 14:38:19,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-16 14:38:19,571 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 28 [2022-02-16 14:38:19,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:19,583 INFO L225 Difference]: With dead ends: 7941 [2022-02-16 14:38:19,584 INFO L226 Difference]: Without dead ends: 7941 [2022-02-16 14:38:19,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2531 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1480, Invalid=5660, Unknown=0, NotChecked=0, Total=7140 [2022-02-16 14:38:19,585 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 378 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:19,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 279 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:38:19,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7941 states. [2022-02-16 14:38:19,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7941 to 4275. [2022-02-16 14:38:19,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4275 states, 4274 states have (on average 2.559429106223678) internal successors, (10939), 4274 states have internal predecessors, (10939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:19,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4275 states to 4275 states and 10939 transitions. [2022-02-16 14:38:19,676 INFO L78 Accepts]: Start accepts. Automaton has 4275 states and 10939 transitions. Word has length 28 [2022-02-16 14:38:19,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:19,676 INFO L470 AbstractCegarLoop]: Abstraction has 4275 states and 10939 transitions. [2022-02-16 14:38:19,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 14:38:19,676 INFO L276 IsEmpty]: Start isEmpty. Operand 4275 states and 10939 transitions. [2022-02-16 14:38:19,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:19,681 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:19,681 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:19,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-02-16 14:38:19,881 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 14:38:19,882 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:19,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:19,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1823412236, now seen corresponding path program 29 times [2022-02-16 14:38:19,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:19,882 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87630101] [2022-02-16 14:38:19,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:19,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:19,927 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:19,927 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:19,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87630101] [2022-02-16 14:38:19,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87630101] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:19,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368077420] [2022-02-16 14:38:19,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:38:19,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:19,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:19,929 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 14:38:19,929 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 14:38:19,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:38:19,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:19,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:38:19,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:20,067 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:20,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:20,119 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:20,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368077420] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:20,120 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:20,120 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 16 [2022-02-16 14:38:20,120 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166128459] [2022-02-16 14:38:20,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:20,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 14:38:20,120 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:20,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 14:38:20,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-02-16 14:38:20,120 INFO L87 Difference]: Start difference. First operand 4275 states and 10939 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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 14:38:20,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:20,656 INFO L93 Difference]: Finished difference Result 7196 states and 17625 transitions. [2022-02-16 14:38:20,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-16 14:38:20,656 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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 28 [2022-02-16 14:38:20,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:20,666 INFO L225 Difference]: With dead ends: 7196 [2022-02-16 14:38:20,667 INFO L226 Difference]: Without dead ends: 7195 [2022-02-16 14:38:20,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=517, Invalid=1289, Unknown=0, NotChecked=0, Total=1806 [2022-02-16 14:38:20,667 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 256 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:20,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 188 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:38:20,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7195 states. [2022-02-16 14:38:20,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7195 to 5520. [2022-02-16 14:38:20,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5520 states, 5519 states have (on average 2.596847254937489) internal successors, (14332), 5519 states have internal predecessors, (14332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:20,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5520 states to 5520 states and 14332 transitions. [2022-02-16 14:38:20,745 INFO L78 Accepts]: Start accepts. Automaton has 5520 states and 14332 transitions. Word has length 28 [2022-02-16 14:38:20,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:20,745 INFO L470 AbstractCegarLoop]: Abstraction has 5520 states and 14332 transitions. [2022-02-16 14:38:20,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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 14:38:20,745 INFO L276 IsEmpty]: Start isEmpty. Operand 5520 states and 14332 transitions. [2022-02-16 14:38:20,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:20,752 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:20,752 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:20,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-02-16 14:38:20,952 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 14:38:20,953 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:20,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:20,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1151874248, now seen corresponding path program 30 times [2022-02-16 14:38:20,953 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:20,953 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445752123] [2022-02-16 14:38:20,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:20,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:20,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:21,007 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:21,007 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:21,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445752123] [2022-02-16 14:38:21,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445752123] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:21,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225689863] [2022-02-16 14:38:21,007 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:38:21,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:21,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:21,008 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 14:38:21,009 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 14:38:21,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-16 14:38:21,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:21,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:38:21,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:21,119 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:21,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:21,213 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:21,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225689863] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:21,214 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:21,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-16 14:38:21,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874137831] [2022-02-16 14:38:21,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:21,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 14:38:21,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:21,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 14:38:21,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-02-16 14:38:21,214 INFO L87 Difference]: Start difference. First operand 5520 states and 14332 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 14:38:22,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:22,308 INFO L93 Difference]: Finished difference Result 9162 states and 22424 transitions. [2022-02-16 14:38:22,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-16 14:38:22,308 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 28 [2022-02-16 14:38:22,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:22,323 INFO L225 Difference]: With dead ends: 9162 [2022-02-16 14:38:22,324 INFO L226 Difference]: Without dead ends: 9161 [2022-02-16 14:38:22,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2359 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1360, Invalid=5446, Unknown=0, NotChecked=0, Total=6806 [2022-02-16 14:38:22,325 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 364 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:22,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 194 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:38:22,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9161 states. [2022-02-16 14:38:22,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9161 to 5627. [2022-02-16 14:38:22,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5627 states, 5626 states have (on average 2.587273373622467) internal successors, (14556), 5626 states have internal predecessors, (14556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:22,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5627 states to 5627 states and 14556 transitions. [2022-02-16 14:38:22,423 INFO L78 Accepts]: Start accepts. Automaton has 5627 states and 14556 transitions. Word has length 28 [2022-02-16 14:38:22,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:22,423 INFO L470 AbstractCegarLoop]: Abstraction has 5627 states and 14556 transitions. [2022-02-16 14:38:22,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 14:38:22,423 INFO L276 IsEmpty]: Start isEmpty. Operand 5627 states and 14556 transitions. [2022-02-16 14:38:22,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:22,429 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:22,429 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:22,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-02-16 14:38:22,629 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 14:38:22,630 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:22,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:22,630 INFO L85 PathProgramCache]: Analyzing trace with hash -58592460, now seen corresponding path program 46 times [2022-02-16 14:38:22,630 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:22,630 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016771575] [2022-02-16 14:38:22,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:22,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:22,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:22,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:22,672 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:22,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016771575] [2022-02-16 14:38:22,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016771575] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:22,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253332049] [2022-02-16 14:38:22,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:38:22,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:22,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:22,673 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 14:38:22,673 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 14:38:22,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:38:22,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:22,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-16 14:38:22,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:22,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:22,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:22,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:22,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253332049] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:22,848 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:22,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-02-16 14:38:22,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057191433] [2022-02-16 14:38:22,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:22,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 14:38:22,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:22,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 14:38:22,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-02-16 14:38:22,849 INFO L87 Difference]: Start difference. First operand 5627 states and 14556 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 14:38:23,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:23,561 INFO L93 Difference]: Finished difference Result 11950 states and 29181 transitions. [2022-02-16 14:38:23,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-16 14:38:23,561 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 28 [2022-02-16 14:38:23,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:23,581 INFO L225 Difference]: With dead ends: 11950 [2022-02-16 14:38:23,582 INFO L226 Difference]: Without dead ends: 11907 [2022-02-16 14:38:23,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=652, Invalid=2000, Unknown=0, NotChecked=0, Total=2652 [2022-02-16 14:38:23,582 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 300 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:23,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 223 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:38:23,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11907 states. [2022-02-16 14:38:23,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11907 to 9292. [2022-02-16 14:38:23,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9292 states, 9291 states have (on average 2.658594338607254) internal successors, (24701), 9291 states have internal predecessors, (24701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:23,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9292 states to 9292 states and 24701 transitions. [2022-02-16 14:38:23,750 INFO L78 Accepts]: Start accepts. Automaton has 9292 states and 24701 transitions. Word has length 28 [2022-02-16 14:38:23,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:23,750 INFO L470 AbstractCegarLoop]: Abstraction has 9292 states and 24701 transitions. [2022-02-16 14:38:23,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 14:38:23,750 INFO L276 IsEmpty]: Start isEmpty. Operand 9292 states and 24701 transitions. [2022-02-16 14:38:23,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:23,762 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:23,762 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:23,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-02-16 14:38:23,963 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 14:38:23,964 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:23,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:23,964 INFO L85 PathProgramCache]: Analyzing trace with hash 716430712, now seen corresponding path program 47 times [2022-02-16 14:38:23,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:23,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8000711] [2022-02-16 14:38:23,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:23,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:23,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:38:23,998 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:23,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8000711] [2022-02-16 14:38:23,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8000711] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:23,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110719724] [2022-02-16 14:38:23,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:38:23,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:23,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:23,999 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 14:38:24,000 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 14:38:24,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:38:24,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:24,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:38:24,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:24,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:38:24,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:24,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:38:24,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110719724] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:24,195 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:24,195 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 13 [2022-02-16 14:38:24,195 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482366512] [2022-02-16 14:38:24,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:24,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 14:38:24,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:24,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 14:38:24,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-02-16 14:38:24,195 INFO L87 Difference]: Start difference. First operand 9292 states and 24701 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 14:38:24,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:24,543 INFO L93 Difference]: Finished difference Result 12934 states and 31877 transitions. [2022-02-16 14:38:24,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-16 14:38:24,544 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 28 [2022-02-16 14:38:24,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:24,567 INFO L225 Difference]: With dead ends: 12934 [2022-02-16 14:38:24,568 INFO L226 Difference]: Without dead ends: 12934 [2022-02-16 14:38:24,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=328, Invalid=602, Unknown=0, NotChecked=0, Total=930 [2022-02-16 14:38:24,568 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 228 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:24,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 80 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:38:24,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12934 states. [2022-02-16 14:38:24,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12934 to 9594. [2022-02-16 14:38:24,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9594 states, 9593 states have (on average 2.6353591160220993) internal successors, (25281), 9593 states have internal predecessors, (25281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:24,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9594 states to 9594 states and 25281 transitions. [2022-02-16 14:38:24,749 INFO L78 Accepts]: Start accepts. Automaton has 9594 states and 25281 transitions. Word has length 28 [2022-02-16 14:38:24,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:24,749 INFO L470 AbstractCegarLoop]: Abstraction has 9594 states and 25281 transitions. [2022-02-16 14:38:24,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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 14:38:24,749 INFO L276 IsEmpty]: Start isEmpty. Operand 9594 states and 25281 transitions. [2022-02-16 14:38:24,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:24,764 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:24,764 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:24,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-02-16 14:38:24,967 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 14:38:24,967 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:24,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:24,968 INFO L85 PathProgramCache]: Analyzing trace with hash 2035252732, now seen corresponding path program 48 times [2022-02-16 14:38:24,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:24,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594463418] [2022-02-16 14:38:24,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:24,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:25,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:25,090 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:25,090 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:25,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594463418] [2022-02-16 14:38:25,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594463418] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:25,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474749302] [2022-02-16 14:38:25,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:38:25,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:25,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:25,091 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 14:38:25,092 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 14:38:25,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 14:38:25,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:25,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:38:25,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:25,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:25,273 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:25,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474749302] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:25,273 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:25,273 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 15 [2022-02-16 14:38:25,273 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686628589] [2022-02-16 14:38:25,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:25,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 14:38:25,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:25,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 14:38:25,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:38:25,274 INFO L87 Difference]: Start difference. First operand 9594 states and 25281 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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 14:38:25,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:25,882 INFO L93 Difference]: Finished difference Result 13882 states and 34767 transitions. [2022-02-16 14:38:25,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-16 14:38:25,882 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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 28 [2022-02-16 14:38:25,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:25,907 INFO L225 Difference]: With dead ends: 13882 [2022-02-16 14:38:25,907 INFO L226 Difference]: Without dead ends: 13882 [2022-02-16 14:38:25,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=653, Invalid=2103, Unknown=0, NotChecked=0, Total=2756 [2022-02-16 14:38:25,908 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 370 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:25,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 190 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:38:25,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13882 states. [2022-02-16 14:38:26,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13882 to 10692. [2022-02-16 14:38:26,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10692 states, 10691 states have (on average 2.6262276681320738) internal successors, (28077), 10691 states have internal predecessors, (28077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:26,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10692 states to 10692 states and 28077 transitions. [2022-02-16 14:38:26,107 INFO L78 Accepts]: Start accepts. Automaton has 10692 states and 28077 transitions. Word has length 28 [2022-02-16 14:38:26,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:26,107 INFO L470 AbstractCegarLoop]: Abstraction has 10692 states and 28077 transitions. [2022-02-16 14:38:26,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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 14:38:26,107 INFO L276 IsEmpty]: Start isEmpty. Operand 10692 states and 28077 transitions. [2022-02-16 14:38:26,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:26,121 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:26,121 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:26,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-02-16 14:38:26,321 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 14:38:26,322 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:26,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:26,322 INFO L85 PathProgramCache]: Analyzing trace with hash -410721028, now seen corresponding path program 49 times [2022-02-16 14:38:26,322 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:26,322 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513652179] [2022-02-16 14:38:26,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:26,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:26,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:26,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:26,355 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:26,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513652179] [2022-02-16 14:38:26,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513652179] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:26,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285460580] [2022-02-16 14:38:26,355 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:38:26,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:26,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:26,356 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 14:38:26,357 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 14:38:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:26,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-16 14:38:26,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:26,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:26,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:26,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:26,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285460580] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:26,521 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:26,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-16 14:38:26,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291680835] [2022-02-16 14:38:26,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:26,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 14:38:26,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:26,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 14:38:26,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-02-16 14:38:26,521 INFO L87 Difference]: Start difference. First operand 10692 states and 28077 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 14:38:26,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:26,966 INFO L93 Difference]: Finished difference Result 14091 states and 35049 transitions. [2022-02-16 14:38:26,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-16 14:38:26,967 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 28 [2022-02-16 14:38:26,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:26,997 INFO L225 Difference]: With dead ends: 14091 [2022-02-16 14:38:26,997 INFO L226 Difference]: Without dead ends: 14078 [2022-02-16 14:38:26,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=376, Invalid=956, Unknown=0, NotChecked=0, Total=1332 [2022-02-16 14:38:26,997 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 243 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:26,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 178 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:38:27,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14078 states. [2022-02-16 14:38:27,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14078 to 11295. [2022-02-16 14:38:27,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11295 states, 11294 states have (on average 2.6299805206304234) internal successors, (29703), 11294 states have internal predecessors, (29703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:27,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11295 states to 11295 states and 29703 transitions. [2022-02-16 14:38:27,210 INFO L78 Accepts]: Start accepts. Automaton has 11295 states and 29703 transitions. Word has length 28 [2022-02-16 14:38:27,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:27,210 INFO L470 AbstractCegarLoop]: Abstraction has 11295 states and 29703 transitions. [2022-02-16 14:38:27,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 14:38:27,211 INFO L276 IsEmpty]: Start isEmpty. Operand 11295 states and 29703 transitions. [2022-02-16 14:38:27,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:27,224 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:27,224 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:27,239 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 14:38:27,424 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 14:38:27,425 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:27,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:27,425 INFO L85 PathProgramCache]: Analyzing trace with hash 735886080, now seen corresponding path program 50 times [2022-02-16 14:38:27,425 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:27,425 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622423607] [2022-02-16 14:38:27,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:27,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:27,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:27,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:38:27,460 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:27,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622423607] [2022-02-16 14:38:27,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622423607] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:27,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125300490] [2022-02-16 14:38:27,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:38:27,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:27,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:27,461 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 14:38:27,462 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 14:38:27,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:38:27,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:27,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-16 14:38:27,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:27,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:38:27,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:38:27,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125300490] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:27,632 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:27,632 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-16 14:38:27,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246745869] [2022-02-16 14:38:27,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:27,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 14:38:27,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:27,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 14:38:27,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-02-16 14:38:27,633 INFO L87 Difference]: Start difference. First operand 11295 states and 29703 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 14:38:28,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:28,091 INFO L93 Difference]: Finished difference Result 13873 states and 34236 transitions. [2022-02-16 14:38:28,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-16 14:38:28,092 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 28 [2022-02-16 14:38:28,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:28,123 INFO L225 Difference]: With dead ends: 13873 [2022-02-16 14:38:28,123 INFO L226 Difference]: Without dead ends: 13873 [2022-02-16 14:38:28,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=376, Invalid=956, Unknown=0, NotChecked=0, Total=1332 [2022-02-16 14:38:28,123 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 235 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:28,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 269 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:38:28,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13873 states. [2022-02-16 14:38:28,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13873 to 11314. [2022-02-16 14:38:28,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11314 states, 11313 states have (on average 2.62291169451074) internal successors, (29673), 11313 states have internal predecessors, (29673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:28,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11314 states to 11314 states and 29673 transitions. [2022-02-16 14:38:28,339 INFO L78 Accepts]: Start accepts. Automaton has 11314 states and 29673 transitions. Word has length 28 [2022-02-16 14:38:28,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:28,339 INFO L470 AbstractCegarLoop]: Abstraction has 11314 states and 29673 transitions. [2022-02-16 14:38:28,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 14:38:28,339 INFO L276 IsEmpty]: Start isEmpty. Operand 11314 states and 29673 transitions. [2022-02-16 14:38:28,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:28,354 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:28,354 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:28,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-02-16 14:38:28,554 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 14:38:28,554 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:28,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:28,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1407424068, now seen corresponding path program 51 times [2022-02-16 14:38:28,555 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:28,555 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171257062] [2022-02-16 14:38:28,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:28,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:28,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:38:28,598 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:28,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171257062] [2022-02-16 14:38:28,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171257062] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:28,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083653255] [2022-02-16 14:38:28,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:38:28,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:28,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:28,599 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 14:38:28,599 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 14:38:28,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-16 14:38:28,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:28,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:38:28,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:38:28,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:28,784 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:38:28,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083653255] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:28,784 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:28,784 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 15 [2022-02-16 14:38:28,784 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038595456] [2022-02-16 14:38:28,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:28,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 14:38:28,785 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:28,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 14:38:28,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:38:28,785 INFO L87 Difference]: Start difference. First operand 11314 states and 29673 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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 14:38:29,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:29,328 INFO L93 Difference]: Finished difference Result 14481 states and 36346 transitions. [2022-02-16 14:38:29,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-16 14:38:29,328 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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 28 [2022-02-16 14:38:29,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:29,355 INFO L225 Difference]: With dead ends: 14481 [2022-02-16 14:38:29,355 INFO L226 Difference]: Without dead ends: 14480 [2022-02-16 14:38:29,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=537, Invalid=1719, Unknown=0, NotChecked=0, Total=2256 [2022-02-16 14:38:29,355 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 358 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:29,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 142 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:38:29,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14480 states. [2022-02-16 14:38:29,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14480 to 11305. [2022-02-16 14:38:29,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11305 states, 11304 states have (on average 2.6232307147912244) internal successors, (29653), 11304 states have internal predecessors, (29653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:29,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11305 states to 11305 states and 29653 transitions. [2022-02-16 14:38:29,588 INFO L78 Accepts]: Start accepts. Automaton has 11305 states and 29653 transitions. Word has length 28 [2022-02-16 14:38:29,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:29,588 INFO L470 AbstractCegarLoop]: Abstraction has 11305 states and 29653 transitions. [2022-02-16 14:38:29,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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 14:38:29,588 INFO L276 IsEmpty]: Start isEmpty. Operand 11305 states and 29653 transitions. [2022-02-16 14:38:29,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:29,602 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:29,602 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:29,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-02-16 14:38:29,802 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 14:38:29,803 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:29,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:29,803 INFO L85 PathProgramCache]: Analyzing trace with hash 2020104640, now seen corresponding path program 52 times [2022-02-16 14:38:29,803 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:29,803 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778052420] [2022-02-16 14:38:29,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:29,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:29,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:29,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:29,846 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:29,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778052420] [2022-02-16 14:38:29,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778052420] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:29,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987088250] [2022-02-16 14:38:29,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:38:29,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:29,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:29,848 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 14:38:29,848 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 14:38:29,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:38:29,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:29,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-16 14:38:29,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:29,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:30,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:30,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987088250] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:30,018 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:30,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-02-16 14:38:30,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141591438] [2022-02-16 14:38:30,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:30,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 14:38:30,019 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:30,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 14:38:30,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-02-16 14:38:30,019 INFO L87 Difference]: Start difference. First operand 11305 states and 29653 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 14:38:30,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:30,567 INFO L93 Difference]: Finished difference Result 14620 states and 36004 transitions. [2022-02-16 14:38:30,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-16 14:38:30,568 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 28 [2022-02-16 14:38:30,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:30,595 INFO L225 Difference]: With dead ends: 14620 [2022-02-16 14:38:30,595 INFO L226 Difference]: Without dead ends: 14620 [2022-02-16 14:38:30,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=516, Invalid=1290, Unknown=0, NotChecked=0, Total=1806 [2022-02-16 14:38:30,596 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 292 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:30,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 292 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:38:30,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14620 states. [2022-02-16 14:38:30,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14620 to 11436. [2022-02-16 14:38:30,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11436 states, 11435 states have (on average 2.6262352426759947) internal successors, (30031), 11435 states have internal predecessors, (30031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:30,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11436 states to 11436 states and 30031 transitions. [2022-02-16 14:38:30,822 INFO L78 Accepts]: Start accepts. Automaton has 11436 states and 30031 transitions. Word has length 28 [2022-02-16 14:38:30,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:30,822 INFO L470 AbstractCegarLoop]: Abstraction has 11436 states and 30031 transitions. [2022-02-16 14:38:30,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 14:38:30,822 INFO L276 IsEmpty]: Start isEmpty. Operand 11436 states and 30031 transitions. [2022-02-16 14:38:30,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:30,837 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:30,837 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:30,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-02-16 14:38:31,037 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 14:38:31,038 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:31,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:31,038 INFO L85 PathProgramCache]: Analyzing trace with hash 102022580, now seen corresponding path program 53 times [2022-02-16 14:38:31,038 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:31,038 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494770238] [2022-02-16 14:38:31,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:31,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:31,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:31,093 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:31,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494770238] [2022-02-16 14:38:31,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494770238] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:31,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422217690] [2022-02-16 14:38:31,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:38:31,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:31,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:31,095 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 14:38:31,096 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 14:38:31,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:38:31,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:31,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:38:31,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:31,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:31,408 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:31,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422217690] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:31,408 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:31,409 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 14:38:31,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584913163] [2022-02-16 14:38:31,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:31,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 14:38:31,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:31,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 14:38:31,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:38:31,410 INFO L87 Difference]: Start difference. First operand 11436 states and 30031 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:33,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:33,579 INFO L93 Difference]: Finished difference Result 29287 states and 72545 transitions. [2022-02-16 14:38:33,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-02-16 14:38:33,579 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-16 14:38:33,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:33,646 INFO L225 Difference]: With dead ends: 29287 [2022-02-16 14:38:33,647 INFO L226 Difference]: Without dead ends: 29287 [2022-02-16 14:38:33,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7492 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4085, Invalid=14275, Unknown=0, NotChecked=0, Total=18360 [2022-02-16 14:38:33,649 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 639 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:33,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [639 Valid, 259 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 971 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:38:33,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29287 states. [2022-02-16 14:38:34,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29287 to 15192. [2022-02-16 14:38:34,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15192 states, 15191 states have (on average 2.6963991837272068) internal successors, (40961), 15191 states have internal predecessors, (40961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:34,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15192 states to 15192 states and 40961 transitions. [2022-02-16 14:38:34,119 INFO L78 Accepts]: Start accepts. Automaton has 15192 states and 40961 transitions. Word has length 28 [2022-02-16 14:38:34,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:34,119 INFO L470 AbstractCegarLoop]: Abstraction has 15192 states and 40961 transitions. [2022-02-16 14:38:34,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:34,119 INFO L276 IsEmpty]: Start isEmpty. Operand 15192 states and 40961 transitions. [2022-02-16 14:38:34,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:34,139 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:34,139 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:34,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-02-16 14:38:34,340 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 14:38:34,340 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:34,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:34,340 INFO L85 PathProgramCache]: Analyzing trace with hash 904633852, now seen corresponding path program 54 times [2022-02-16 14:38:34,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:34,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812164539] [2022-02-16 14:38:34,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:34,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:34,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:34,389 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:34,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812164539] [2022-02-16 14:38:34,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812164539] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:34,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105348834] [2022-02-16 14:38:34,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:38:34,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:34,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:34,391 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 14:38:34,391 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 14:38:34,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 14:38:34,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:34,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:38:34,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:34,508 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:34,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:34,617 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:34,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105348834] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:34,617 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:34,617 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 14:38:34,617 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627564564] [2022-02-16 14:38:34,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:34,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 14:38:34,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:34,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 14:38:34,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2022-02-16 14:38:34,618 INFO L87 Difference]: Start difference. First operand 15192 states and 40961 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 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 14:38:35,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:35,904 INFO L93 Difference]: Finished difference Result 28668 states and 71055 transitions. [2022-02-16 14:38:35,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-16 14:38:35,904 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 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 28 [2022-02-16 14:38:35,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:35,966 INFO L225 Difference]: With dead ends: 28668 [2022-02-16 14:38:35,966 INFO L226 Difference]: Without dead ends: 28665 [2022-02-16 14:38:35,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2742 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1873, Invalid=5783, Unknown=0, NotChecked=0, Total=7656 [2022-02-16 14:38:35,967 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 469 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:35,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 291 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:38:36,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28665 states. [2022-02-16 14:38:36,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28665 to 15217. [2022-02-16 14:38:36,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15217 states, 15216 states have (on average 2.6945320715036805) internal successors, (41000), 15216 states have internal predecessors, (41000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:36,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15217 states to 15217 states and 41000 transitions. [2022-02-16 14:38:36,441 INFO L78 Accepts]: Start accepts. Automaton has 15217 states and 41000 transitions. Word has length 28 [2022-02-16 14:38:36,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:36,441 INFO L470 AbstractCegarLoop]: Abstraction has 15217 states and 41000 transitions. [2022-02-16 14:38:36,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 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 14:38:36,441 INFO L276 IsEmpty]: Start isEmpty. Operand 15217 states and 41000 transitions. [2022-02-16 14:38:36,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:36,461 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:36,461 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:36,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-02-16 14:38:36,662 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 14:38:36,662 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:36,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:36,662 INFO L85 PathProgramCache]: Analyzing trace with hash 314016440, now seen corresponding path program 31 times [2022-02-16 14:38:36,662 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:36,662 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568370005] [2022-02-16 14:38:36,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:36,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:36,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:36,717 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:36,717 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:36,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568370005] [2022-02-16 14:38:36,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568370005] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:36,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010838312] [2022-02-16 14:38:36,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:38:36,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:36,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:36,718 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 14:38:36,720 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 14:38:36,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:36,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:38:36,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:36,818 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:36,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:36,894 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:36,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010838312] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:36,894 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:36,894 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-02-16 14:38:36,894 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111513862] [2022-02-16 14:38:36,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:36,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 14:38:36,895 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:36,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 14:38:36,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-02-16 14:38:36,895 INFO L87 Difference]: Start difference. First operand 15217 states and 41000 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 14:38:37,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:37,450 INFO L93 Difference]: Finished difference Result 18745 states and 49587 transitions. [2022-02-16 14:38:37,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-16 14:38:37,450 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 28 [2022-02-16 14:38:37,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:37,487 INFO L225 Difference]: With dead ends: 18745 [2022-02-16 14:38:37,487 INFO L226 Difference]: Without dead ends: 18743 [2022-02-16 14:38:37,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=534, Invalid=1818, Unknown=0, NotChecked=0, Total=2352 [2022-02-16 14:38:37,488 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 183 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:37,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 109 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:38:37,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18743 states. [2022-02-16 14:38:37,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18743 to 15251. [2022-02-16 14:38:37,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15251 states, 15250 states have (on average 2.6917377049180327) internal successors, (41049), 15250 states have internal predecessors, (41049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:37,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15251 states to 15251 states and 41049 transitions. [2022-02-16 14:38:37,788 INFO L78 Accepts]: Start accepts. Automaton has 15251 states and 41049 transitions. Word has length 28 [2022-02-16 14:38:37,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:37,788 INFO L470 AbstractCegarLoop]: Abstraction has 15251 states and 41049 transitions. [2022-02-16 14:38:37,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 14:38:37,788 INFO L276 IsEmpty]: Start isEmpty. Operand 15251 states and 41049 transitions. [2022-02-16 14:38:37,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:37,807 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:37,807 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:37,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-02-16 14:38:38,008 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 14:38:38,008 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:38,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:38,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1087575676, now seen corresponding path program 32 times [2022-02-16 14:38:38,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:38,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614576450] [2022-02-16 14:38:38,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:38,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:38,056 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:38,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614576450] [2022-02-16 14:38:38,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614576450] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:38,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089419362] [2022-02-16 14:38:38,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:38:38,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:38,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:38,057 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 14:38:38,058 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 14:38:38,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:38:38,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:38,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:38:38,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:38,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:38,236 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:38,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089419362] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:38,236 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:38,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-02-16 14:38:38,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086310496] [2022-02-16 14:38:38,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:38,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 14:38:38,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:38,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 14:38:38,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-02-16 14:38:38,237 INFO L87 Difference]: Start difference. First operand 15251 states and 41049 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 14:38:38,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:38,885 INFO L93 Difference]: Finished difference Result 18836 states and 49728 transitions. [2022-02-16 14:38:38,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-16 14:38:38,885 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 28 [2022-02-16 14:38:38,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:38,921 INFO L225 Difference]: With dead ends: 18836 [2022-02-16 14:38:38,922 INFO L226 Difference]: Without dead ends: 18836 [2022-02-16 14:38:38,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=636, Invalid=2444, Unknown=0, NotChecked=0, Total=3080 [2022-02-16 14:38:38,922 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 267 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:38,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 115 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:38:38,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18836 states. [2022-02-16 14:38:39,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18836 to 15505. [2022-02-16 14:38:39,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15505 states, 15504 states have (on average 2.681953044375645) internal successors, (41581), 15504 states have internal predecessors, (41581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:39,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15505 states to 15505 states and 41581 transitions. [2022-02-16 14:38:39,223 INFO L78 Accepts]: Start accepts. Automaton has 15505 states and 41581 transitions. Word has length 28 [2022-02-16 14:38:39,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:39,224 INFO L470 AbstractCegarLoop]: Abstraction has 15505 states and 41581 transitions. [2022-02-16 14:38:39,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 14:38:39,224 INFO L276 IsEmpty]: Start isEmpty. Operand 15505 states and 41581 transitions. [2022-02-16 14:38:39,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:39,243 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:39,243 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:39,259 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 14:38:39,444 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 14:38:39,444 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:39,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:39,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1358398084, now seen corresponding path program 33 times [2022-02-16 14:38:39,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:39,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724751306] [2022-02-16 14:38:39,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:39,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:39,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:39,506 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:39,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:39,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724751306] [2022-02-16 14:38:39,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724751306] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:39,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164216823] [2022-02-16 14:38:39,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:38:39,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:39,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:39,508 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 14:38:39,509 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 14:38:39,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:38:39,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:39,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:38:39,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:39,690 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:39,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:39,754 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:38:39,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164216823] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:39,754 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:39,754 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 16 [2022-02-16 14:38:39,754 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588013318] [2022-02-16 14:38:39,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:39,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 14:38:39,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:39,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 14:38:39,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-02-16 14:38:39,755 INFO L87 Difference]: Start difference. First operand 15505 states and 41581 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 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 14:38:40,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:40,423 INFO L93 Difference]: Finished difference Result 21770 states and 57681 transitions. [2022-02-16 14:38:40,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-16 14:38:40,424 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 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 28 [2022-02-16 14:38:40,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:40,472 INFO L225 Difference]: With dead ends: 21770 [2022-02-16 14:38:40,473 INFO L226 Difference]: Without dead ends: 21761 [2022-02-16 14:38:40,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=392, Invalid=1168, Unknown=0, NotChecked=0, Total=1560 [2022-02-16 14:38:40,473 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 239 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:40,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 171 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:38:40,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21761 states. [2022-02-16 14:38:40,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21761 to 20580. [2022-02-16 14:38:40,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20580 states, 20579 states have (on average 2.702852422372321) internal successors, (55622), 20579 states have internal predecessors, (55622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:40,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20580 states to 20580 states and 55622 transitions. [2022-02-16 14:38:40,865 INFO L78 Accepts]: Start accepts. Automaton has 20580 states and 55622 transitions. Word has length 28 [2022-02-16 14:38:40,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:40,865 INFO L470 AbstractCegarLoop]: Abstraction has 20580 states and 55622 transitions. [2022-02-16 14:38:40,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 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 14:38:40,866 INFO L276 IsEmpty]: Start isEmpty. Operand 20580 states and 55622 transitions. [2022-02-16 14:38:40,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:40,894 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:40,894 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:40,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-02-16 14:38:41,094 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 14:38:41,095 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:41,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:41,095 INFO L85 PathProgramCache]: Analyzing trace with hash 459747012, now seen corresponding path program 34 times [2022-02-16 14:38:41,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:41,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967691510] [2022-02-16 14:38:41,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:41,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:41,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:38:41,141 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:41,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967691510] [2022-02-16 14:38:41,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967691510] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:41,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174219888] [2022-02-16 14:38:41,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:38:41,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:41,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:41,142 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 14:38:41,143 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 14:38:41,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:38:41,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:41,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:38:41,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:41,232 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:38:41,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:41,304 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:38:41,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174219888] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:41,305 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:41,305 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-02-16 14:38:41,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359232180] [2022-02-16 14:38:41,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:41,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 14:38:41,305 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:41,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 14:38:41,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-02-16 14:38:41,305 INFO L87 Difference]: Start difference. First operand 20580 states and 55622 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 14:38:41,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:41,801 INFO L93 Difference]: Finished difference Result 24738 states and 66091 transitions. [2022-02-16 14:38:41,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-16 14:38:41,802 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 28 [2022-02-16 14:38:41,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:41,858 INFO L225 Difference]: With dead ends: 24738 [2022-02-16 14:38:41,858 INFO L226 Difference]: Without dead ends: 24736 [2022-02-16 14:38:41,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=414, Invalid=1478, Unknown=0, NotChecked=0, Total=1892 [2022-02-16 14:38:41,859 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 246 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:41,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 99 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:38:41,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24736 states. [2022-02-16 14:38:42,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24736 to 20518. [2022-02-16 14:38:42,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20518 states, 20517 states have (on average 2.7037091192669496) internal successors, (55472), 20517 states have internal predecessors, (55472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:42,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20518 states to 20518 states and 55472 transitions. [2022-02-16 14:38:42,294 INFO L78 Accepts]: Start accepts. Automaton has 20518 states and 55472 transitions. Word has length 28 [2022-02-16 14:38:42,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:42,294 INFO L470 AbstractCegarLoop]: Abstraction has 20518 states and 55472 transitions. [2022-02-16 14:38:42,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 14:38:42,294 INFO L276 IsEmpty]: Start isEmpty. Operand 20518 states and 55472 transitions. [2022-02-16 14:38:42,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:42,322 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:42,323 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:42,339 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 14:38:42,523 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 14:38:42,523 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:42,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:42,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1818589124, now seen corresponding path program 55 times [2022-02-16 14:38:42,523 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:42,523 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653025866] [2022-02-16 14:38:42,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:42,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:42,582 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:42,583 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:42,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653025866] [2022-02-16 14:38:42,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653025866] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:42,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023676781] [2022-02-16 14:38:42,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:38:42,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:42,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:42,584 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 14:38:42,584 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 14:38:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:42,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:38:42,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:42,677 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:42,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:42,762 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:42,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023676781] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:42,762 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:42,762 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 16 [2022-02-16 14:38:42,762 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404032651] [2022-02-16 14:38:42,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:42,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 14:38:42,762 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:42,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 14:38:42,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-02-16 14:38:42,763 INFO L87 Difference]: Start difference. First operand 20518 states and 55472 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 14:38:43,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:43,444 INFO L93 Difference]: Finished difference Result 24625 states and 64806 transitions. [2022-02-16 14:38:43,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-16 14:38:43,444 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2022-02-16 14:38:43,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:43,495 INFO L225 Difference]: With dead ends: 24625 [2022-02-16 14:38:43,495 INFO L226 Difference]: Without dead ends: 24622 [2022-02-16 14:38:43,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=629, Invalid=2127, Unknown=0, NotChecked=0, Total=2756 [2022-02-16 14:38:43,496 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 277 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:43,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 221 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:38:43,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24622 states. [2022-02-16 14:38:43,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24622 to 20518. [2022-02-16 14:38:43,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20518 states, 20517 states have (on average 2.7036603791977383) internal successors, (55471), 20517 states have internal predecessors, (55471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:43,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20518 states to 20518 states and 55471 transitions. [2022-02-16 14:38:43,884 INFO L78 Accepts]: Start accepts. Automaton has 20518 states and 55471 transitions. Word has length 28 [2022-02-16 14:38:43,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:43,884 INFO L470 AbstractCegarLoop]: Abstraction has 20518 states and 55471 transitions. [2022-02-16 14:38:43,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 14:38:43,884 INFO L276 IsEmpty]: Start isEmpty. Operand 20518 states and 55471 transitions. [2022-02-16 14:38:43,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:43,907 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:43,907 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:43,923 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 14:38:44,108 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 14:38:44,108 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:44,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:44,108 INFO L85 PathProgramCache]: Analyzing trace with hash 458369280, now seen corresponding path program 56 times [2022-02-16 14:38:44,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:44,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958674624] [2022-02-16 14:38:44,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:44,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:44,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:44,164 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:44,164 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:44,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958674624] [2022-02-16 14:38:44,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958674624] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:44,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350384479] [2022-02-16 14:38:44,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:38:44,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:44,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:44,166 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 14:38:44,167 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 14:38:44,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:38:44,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:44,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:38:44,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:44,281 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:44,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:44,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:44,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350384479] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:44,374 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:44,374 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 18 [2022-02-16 14:38:44,374 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701965696] [2022-02-16 14:38:44,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:44,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 14:38:44,374 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:44,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 14:38:44,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-02-16 14:38:44,375 INFO L87 Difference]: Start difference. First operand 20518 states and 55471 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 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 14:38:45,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:45,847 INFO L93 Difference]: Finished difference Result 34248 states and 86037 transitions. [2022-02-16 14:38:45,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-16 14:38:45,847 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 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 28 [2022-02-16 14:38:45,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:45,934 INFO L225 Difference]: With dead ends: 34248 [2022-02-16 14:38:45,935 INFO L226 Difference]: Without dead ends: 34245 [2022-02-16 14:38:45,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3214 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1989, Invalid=6941, Unknown=0, NotChecked=0, Total=8930 [2022-02-16 14:38:45,936 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 483 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:45,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 276 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:38:45,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34245 states. [2022-02-16 14:38:46,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34245 to 20681. [2022-02-16 14:38:46,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20681 states, 20680 states have (on average 2.6961315280464215) internal successors, (55756), 20680 states have internal predecessors, (55756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:46,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20681 states to 20681 states and 55756 transitions. [2022-02-16 14:38:46,519 INFO L78 Accepts]: Start accepts. Automaton has 20681 states and 55756 transitions. Word has length 28 [2022-02-16 14:38:46,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:46,519 INFO L470 AbstractCegarLoop]: Abstraction has 20681 states and 55756 transitions. [2022-02-16 14:38:46,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 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 14:38:46,520 INFO L276 IsEmpty]: Start isEmpty. Operand 20681 states and 55756 transitions. [2022-02-16 14:38:46,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:46,543 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:46,543 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:46,558 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 14:38:46,743 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 14:38:46,743 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:46,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:46,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1314442386, now seen corresponding path program 57 times [2022-02-16 14:38:46,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:46,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094001052] [2022-02-16 14:38:46,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:46,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:46,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:46,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:46,791 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:46,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094001052] [2022-02-16 14:38:46,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094001052] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:46,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655921880] [2022-02-16 14:38:46,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:38:46,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:46,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:46,792 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 14:38:46,793 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 14:38:46,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:38:46,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:46,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:38:46,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:46,933 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:46,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:47,041 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:47,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655921880] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:47,041 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:47,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2022-02-16 14:38:47,041 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239129140] [2022-02-16 14:38:47,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:47,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 14:38:47,042 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:47,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 14:38:47,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:38:47,042 INFO L87 Difference]: Start difference. First operand 20681 states and 55756 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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 14:38:48,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:48,850 INFO L93 Difference]: Finished difference Result 26540 states and 68418 transitions. [2022-02-16 14:38:48,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-02-16 14:38:48,851 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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 28 [2022-02-16 14:38:48,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:48,913 INFO L225 Difference]: With dead ends: 26540 [2022-02-16 14:38:48,913 INFO L226 Difference]: Without dead ends: 26540 [2022-02-16 14:38:48,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5565 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2559, Invalid=11247, Unknown=0, NotChecked=0, Total=13806 [2022-02-16 14:38:48,915 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 496 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:48,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 484 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:38:48,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26540 states. [2022-02-16 14:38:49,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26540 to 20708. [2022-02-16 14:38:49,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20708 states, 20707 states have (on average 2.69449944463225) internal successors, (55795), 20707 states have internal predecessors, (55795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:49,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20708 states to 20708 states and 55795 transitions. [2022-02-16 14:38:49,440 INFO L78 Accepts]: Start accepts. Automaton has 20708 states and 55795 transitions. Word has length 28 [2022-02-16 14:38:49,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:49,441 INFO L470 AbstractCegarLoop]: Abstraction has 20708 states and 55795 transitions. [2022-02-16 14:38:49,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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 14:38:49,441 INFO L276 IsEmpty]: Start isEmpty. Operand 20708 states and 55795 transitions. [2022-02-16 14:38:49,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:49,466 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:49,466 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:49,481 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 14:38:49,666 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 14:38:49,666 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:49,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:49,666 INFO L85 PathProgramCache]: Analyzing trace with hash -19718532, now seen corresponding path program 35 times [2022-02-16 14:38:49,666 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:49,667 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486202252] [2022-02-16 14:38:49,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:49,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:49,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:49,719 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:49,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486202252] [2022-02-16 14:38:49,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486202252] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:49,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932164937] [2022-02-16 14:38:49,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:38:49,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:49,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:49,720 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 14:38:49,721 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 14:38:49,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:38:49,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:49,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:38:49,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:49,819 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:49,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:49,892 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:49,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932164937] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:49,892 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:49,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2022-02-16 14:38:49,892 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188119282] [2022-02-16 14:38:49,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:49,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 14:38:49,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:49,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 14:38:49,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:38:49,893 INFO L87 Difference]: Start difference. First operand 20708 states and 55795 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 14:38:50,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:50,474 INFO L93 Difference]: Finished difference Result 24947 states and 66451 transitions. [2022-02-16 14:38:50,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-16 14:38:50,475 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2022-02-16 14:38:50,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:50,526 INFO L225 Difference]: With dead ends: 24947 [2022-02-16 14:38:50,527 INFO L226 Difference]: Without dead ends: 24947 [2022-02-16 14:38:50,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=500, Invalid=1480, Unknown=0, NotChecked=0, Total=1980 [2022-02-16 14:38:50,527 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 151 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:50,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 164 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:38:50,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24947 states. [2022-02-16 14:38:50,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24947 to 20730. [2022-02-16 14:38:50,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20730 states, 20729 states have (on average 2.6938106035023397) internal successors, (55840), 20729 states have internal predecessors, (55840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:50,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20730 states to 20730 states and 55840 transitions. [2022-02-16 14:38:50,929 INFO L78 Accepts]: Start accepts. Automaton has 20730 states and 55840 transitions. Word has length 28 [2022-02-16 14:38:50,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:50,929 INFO L470 AbstractCegarLoop]: Abstraction has 20730 states and 55840 transitions. [2022-02-16 14:38:50,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 14:38:50,929 INFO L276 IsEmpty]: Start isEmpty. Operand 20730 states and 55840 transitions. [2022-02-16 14:38:50,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:50,953 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:50,953 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:50,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-02-16 14:38:51,153 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 14:38:51,154 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:51,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:51,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1131806788, now seen corresponding path program 36 times [2022-02-16 14:38:51,154 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:51,154 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878882744] [2022-02-16 14:38:51,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:51,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:51,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:51,199 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:51,199 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:51,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878882744] [2022-02-16 14:38:51,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878882744] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:51,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914164122] [2022-02-16 14:38:51,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:38:51,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:51,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:51,201 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 14:38:51,201 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 14:38:51,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 14:38:51,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:51,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:38:51,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:51,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:51,366 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:51,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914164122] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:51,366 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:51,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2022-02-16 14:38:51,366 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396475526] [2022-02-16 14:38:51,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:51,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 14:38:51,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:51,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 14:38:51,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:38:51,367 INFO L87 Difference]: Start difference. First operand 20730 states and 55840 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 14:38:51,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:51,939 INFO L93 Difference]: Finished difference Result 24904 states and 66336 transitions. [2022-02-16 14:38:51,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-16 14:38:51,940 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2022-02-16 14:38:51,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:51,998 INFO L225 Difference]: With dead ends: 24904 [2022-02-16 14:38:51,998 INFO L226 Difference]: Without dead ends: 24901 [2022-02-16 14:38:51,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=447, Invalid=1623, Unknown=0, NotChecked=0, Total=2070 [2022-02-16 14:38:51,998 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 242 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:51,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 144 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:38:52,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24901 states. [2022-02-16 14:38:52,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24901 to 20716. [2022-02-16 14:38:52,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20716 states, 20715 states have (on average 2.694182959208303) internal successors, (55810), 20715 states have internal predecessors, (55810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:52,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20716 states to 20716 states and 55810 transitions. [2022-02-16 14:38:52,545 INFO L78 Accepts]: Start accepts. Automaton has 20716 states and 55810 transitions. Word has length 28 [2022-02-16 14:38:52,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:52,545 INFO L470 AbstractCegarLoop]: Abstraction has 20716 states and 55810 transitions. [2022-02-16 14:38:52,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 14:38:52,546 INFO L276 IsEmpty]: Start isEmpty. Operand 20716 states and 55810 transitions. [2022-02-16 14:38:52,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:52,569 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:52,569 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:52,584 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 14:38:52,769 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 14:38:52,770 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:52,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:52,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1528809992, now seen corresponding path program 58 times [2022-02-16 14:38:52,771 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:52,771 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480020747] [2022-02-16 14:38:52,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:52,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:52,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:52,827 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:52,827 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:52,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480020747] [2022-02-16 14:38:52,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480020747] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:52,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666121430] [2022-02-16 14:38:52,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:38:52,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:52,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:52,829 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 14:38:52,829 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 14:38:52,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:38:52,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:52,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:38:52,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:38:52,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:53,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:53,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666121430] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:53,073 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:53,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 20 [2022-02-16 14:38:53,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848522067] [2022-02-16 14:38:53,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:53,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 14:38:53,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:53,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 14:38:53,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:38:53,074 INFO L87 Difference]: Start difference. First operand 20716 states and 55810 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 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 14:38:54,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:54,802 INFO L93 Difference]: Finished difference Result 30365 states and 78060 transitions. [2022-02-16 14:38:54,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-02-16 14:38:54,803 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 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 28 [2022-02-16 14:38:54,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:54,885 INFO L225 Difference]: With dead ends: 30365 [2022-02-16 14:38:54,885 INFO L226 Difference]: Without dead ends: 30365 [2022-02-16 14:38:54,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4878 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2477, Invalid=9733, Unknown=0, NotChecked=0, Total=12210 [2022-02-16 14:38:54,887 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 529 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:54,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 322 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:38:54,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30365 states. [2022-02-16 14:38:55,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30365 to 20796. [2022-02-16 14:38:55,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20796 states, 20795 states have (on average 2.6921856215436404) internal successors, (55984), 20795 states have internal predecessors, (55984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:55,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20796 states to 20796 states and 55984 transitions. [2022-02-16 14:38:55,376 INFO L78 Accepts]: Start accepts. Automaton has 20796 states and 55984 transitions. Word has length 28 [2022-02-16 14:38:55,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:55,376 INFO L470 AbstractCegarLoop]: Abstraction has 20796 states and 55984 transitions. [2022-02-16 14:38:55,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 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 14:38:55,377 INFO L276 IsEmpty]: Start isEmpty. Operand 20796 states and 55984 transitions. [2022-02-16 14:38:55,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:55,399 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:55,399 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:55,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-02-16 14:38:55,599 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 14:38:55,599 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:55,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:55,600 INFO L85 PathProgramCache]: Analyzing trace with hash 816116276, now seen corresponding path program 59 times [2022-02-16 14:38:55,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:55,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33327836] [2022-02-16 14:38:55,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:55,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:55,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:55,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:55,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:55,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33327836] [2022-02-16 14:38:55,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33327836] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:55,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249991211] [2022-02-16 14:38:55,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:38:55,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:55,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:55,652 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 14:38:55,653 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 14:38:55,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:38:55,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:55,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-16 14:38:55,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:55,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:55,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:55,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249991211] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:55,795 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:55,795 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 13 [2022-02-16 14:38:55,795 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633948042] [2022-02-16 14:38:55,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:55,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 14:38:55,795 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:55,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 14:38:55,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-16 14:38:55,796 INFO L87 Difference]: Start difference. First operand 20796 states and 55984 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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 14:38:56,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:56,153 INFO L93 Difference]: Finished difference Result 29659 states and 78279 transitions. [2022-02-16 14:38:56,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 14:38:56,153 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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 28 [2022-02-16 14:38:56,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:56,220 INFO L225 Difference]: With dead ends: 29659 [2022-02-16 14:38:56,220 INFO L226 Difference]: Without dead ends: 29641 [2022-02-16 14:38:56,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2022-02-16 14:38:56,221 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 146 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:56,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 157 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:38:56,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29641 states. [2022-02-16 14:38:56,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29641 to 24143. [2022-02-16 14:38:56,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24143 states, 24142 states have (on average 2.6935630850799437) internal successors, (65028), 24142 states have internal predecessors, (65028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:56,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24143 states to 24143 states and 65028 transitions. [2022-02-16 14:38:56,723 INFO L78 Accepts]: Start accepts. Automaton has 24143 states and 65028 transitions. Word has length 28 [2022-02-16 14:38:56,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:56,723 INFO L470 AbstractCegarLoop]: Abstraction has 24143 states and 65028 transitions. [2022-02-16 14:38:56,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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 14:38:56,724 INFO L276 IsEmpty]: Start isEmpty. Operand 24143 states and 65028 transitions. [2022-02-16 14:38:56,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:56,751 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:56,751 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:56,766 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 14:38:56,951 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 14:38:56,952 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:56,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:56,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1743087800, now seen corresponding path program 60 times [2022-02-16 14:38:56,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:56,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841042260] [2022-02-16 14:38:56,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:56,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:56,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:56,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:56,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:56,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841042260] [2022-02-16 14:38:56,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841042260] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:56,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775298847] [2022-02-16 14:38:56,985 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:38:56,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:56,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:56,986 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 14:38:56,986 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 14:38:57,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:38:57,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:57,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:38:57,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:38:57,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:57,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:57,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775298847] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:57,186 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:57,186 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2022-02-16 14:38:57,186 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826479405] [2022-02-16 14:38:57,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:57,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 14:38:57,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:57,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 14:38:57,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:38:57,187 INFO L87 Difference]: Start difference. First operand 24143 states and 65028 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 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 14:38:57,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:57,714 INFO L93 Difference]: Finished difference Result 46801 states and 116769 transitions. [2022-02-16 14:38:57,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-16 14:38:57,715 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 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 28 [2022-02-16 14:38:57,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:57,820 INFO L225 Difference]: With dead ends: 46801 [2022-02-16 14:38:57,820 INFO L226 Difference]: Without dead ends: 46801 [2022-02-16 14:38:57,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=462, Invalid=944, Unknown=0, NotChecked=0, Total=1406 [2022-02-16 14:38:57,821 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 315 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:57,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 113 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:38:57,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46801 states. [2022-02-16 14:38:58,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46801 to 30813. [2022-02-16 14:38:58,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30813 states, 30812 states have (on average 2.725431650006491) internal successors, (83976), 30812 states have internal predecessors, (83976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:58,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30813 states to 30813 states and 83976 transitions. [2022-02-16 14:38:58,567 INFO L78 Accepts]: Start accepts. Automaton has 30813 states and 83976 transitions. Word has length 28 [2022-02-16 14:38:58,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:58,568 INFO L470 AbstractCegarLoop]: Abstraction has 30813 states and 83976 transitions. [2022-02-16 14:38:58,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 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 14:38:58,568 INFO L276 IsEmpty]: Start isEmpty. Operand 30813 states and 83976 transitions. [2022-02-16 14:38:58,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:38:58,603 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:58,603 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:58,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-02-16 14:38:58,804 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 14:38:58,804 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:38:58,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:58,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1141900804, now seen corresponding path program 61 times [2022-02-16 14:38:58,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:58,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365307289] [2022-02-16 14:38:58,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:58,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:58,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:58,859 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:58,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365307289] [2022-02-16 14:38:58,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365307289] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:58,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84870305] [2022-02-16 14:38:58,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:38:58,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:58,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:58,861 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 14:38:58,862 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 14:38:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:58,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:38:58,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:59,013 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:38:59,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:59,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84870305] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:59,133 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:59,133 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2022-02-16 14:38:59,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311011113] [2022-02-16 14:38:59,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:59,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 14:38:59,134 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:59,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 14:38:59,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-02-16 14:38:59,134 INFO L87 Difference]: Start difference. First operand 30813 states and 83976 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 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 14:39:00,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:39:00,526 INFO L93 Difference]: Finished difference Result 42959 states and 112466 transitions. [2022-02-16 14:39:00,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-02-16 14:39:00,526 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 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 28 [2022-02-16 14:39:00,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:39:00,632 INFO L225 Difference]: With dead ends: 42959 [2022-02-16 14:39:00,632 INFO L226 Difference]: Without dead ends: 42959 [2022-02-16 14:39:00,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3554 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2004, Invalid=6926, Unknown=0, NotChecked=0, Total=8930 [2022-02-16 14:39:00,633 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 504 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:39:00,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 226 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:39:00,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42959 states. [2022-02-16 14:39:01,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42959 to 30866. [2022-02-16 14:39:01,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30866 states, 30865 states have (on average 2.724412765268103) internal successors, (84089), 30865 states have internal predecessors, (84089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:01,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30866 states to 30866 states and 84089 transitions. [2022-02-16 14:39:01,398 INFO L78 Accepts]: Start accepts. Automaton has 30866 states and 84089 transitions. Word has length 28 [2022-02-16 14:39:01,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:39:01,398 INFO L470 AbstractCegarLoop]: Abstraction has 30866 states and 84089 transitions. [2022-02-16 14:39:01,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 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 14:39:01,398 INFO L276 IsEmpty]: Start isEmpty. Operand 30866 states and 84089 transitions. [2022-02-16 14:39:01,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:39:01,434 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:39:01,434 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:39:01,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-02-16 14:39:01,634 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 14:39:01,635 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:39:01,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:39:01,635 INFO L85 PathProgramCache]: Analyzing trace with hash -2042847176, now seen corresponding path program 62 times [2022-02-16 14:39:01,635 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:39:01,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481806208] [2022-02-16 14:39:01,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:39:01,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:39:01,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:01,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:01,695 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:39:01,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481806208] [2022-02-16 14:39:01,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481806208] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:39:01,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314690922] [2022-02-16 14:39:01,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:39:01,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:01,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:39:01,697 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 14:39:01,698 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 14:39:01,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:39:01,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:39:01,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-16 14:39:01,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:39:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:01,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:39:01,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:01,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314690922] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:39:01,856 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:39:01,856 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-02-16 14:39:01,856 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333046646] [2022-02-16 14:39:01,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:39:01,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 14:39:01,856 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:39:01,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 14:39:01,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-02-16 14:39:01,856 INFO L87 Difference]: Start difference. First operand 30866 states and 84089 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 14:39:02,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:39:02,223 INFO L93 Difference]: Finished difference Result 32799 states and 87349 transitions. [2022-02-16 14:39:02,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 14:39:02,224 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 28 [2022-02-16 14:39:02,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:39:02,300 INFO L225 Difference]: With dead ends: 32799 [2022-02-16 14:39:02,300 INFO L226 Difference]: Without dead ends: 32799 [2022-02-16 14:39:02,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2022-02-16 14:39:02,301 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 148 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:39:02,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 130 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:39:02,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32799 states. [2022-02-16 14:39:03,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32799 to 30374. [2022-02-16 14:39:03,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30374 states, 30373 states have (on average 2.71886214730188) internal successors, (82580), 30373 states have internal predecessors, (82580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:03,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30374 states to 30374 states and 82580 transitions. [2022-02-16 14:39:03,139 INFO L78 Accepts]: Start accepts. Automaton has 30374 states and 82580 transitions. Word has length 28 [2022-02-16 14:39:03,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:39:03,139 INFO L470 AbstractCegarLoop]: Abstraction has 30374 states and 82580 transitions. [2022-02-16 14:39:03,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 14:39:03,139 INFO L276 IsEmpty]: Start isEmpty. Operand 30374 states and 82580 transitions. [2022-02-16 14:39:03,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:39:03,170 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:39:03,170 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:39:03,185 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 14:39:03,371 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 14:39:03,371 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:39:03,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:39:03,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1371309188, now seen corresponding path program 63 times [2022-02-16 14:39:03,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:39:03,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443270282] [2022-02-16 14:39:03,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:39:03,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:39:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:03,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:03,413 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:39:03,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443270282] [2022-02-16 14:39:03,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443270282] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:39:03,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335664147] [2022-02-16 14:39:03,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:39:03,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:03,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:39:03,414 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 14:39:03,414 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 14:39:03,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:39:03,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:39:03,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:39:03,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:39:03,518 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:39:03,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:39:03,613 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:03,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335664147] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:39:03,613 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:39:03,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2022-02-16 14:39:03,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102523565] [2022-02-16 14:39:03,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:39:03,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 14:39:03,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:39:03,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 14:39:03,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-02-16 14:39:03,614 INFO L87 Difference]: Start difference. First operand 30374 states and 82580 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 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 14:39:04,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:39:04,840 INFO L93 Difference]: Finished difference Result 43288 states and 112461 transitions. [2022-02-16 14:39:04,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-16 14:39:04,840 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 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 28 [2022-02-16 14:39:04,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:39:04,941 INFO L225 Difference]: With dead ends: 43288 [2022-02-16 14:39:04,941 INFO L226 Difference]: Without dead ends: 43287 [2022-02-16 14:39:04,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2991 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1680, Invalid=6330, Unknown=0, NotChecked=0, Total=8010 [2022-02-16 14:39:04,942 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 526 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:39:04,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 201 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:39:04,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43287 states. [2022-02-16 14:39:05,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43287 to 30444. [2022-02-16 14:39:05,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30444 states, 30443 states have (on average 2.7178004795847976) internal successors, (82738), 30443 states have internal predecessors, (82738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:05,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30444 states to 30444 states and 82738 transitions. [2022-02-16 14:39:05,784 INFO L78 Accepts]: Start accepts. Automaton has 30444 states and 82738 transitions. Word has length 28 [2022-02-16 14:39:05,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:39:05,784 INFO L470 AbstractCegarLoop]: Abstraction has 30444 states and 82738 transitions. [2022-02-16 14:39:05,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 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 14:39:05,784 INFO L276 IsEmpty]: Start isEmpty. Operand 30444 states and 82738 transitions. [2022-02-16 14:39:05,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:39:05,821 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:39:05,821 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:39:05,837 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 14:39:06,021 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 14:39:06,021 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:39:06,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:39:06,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1591139448, now seen corresponding path program 64 times [2022-02-16 14:39:06,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:39:06,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316210775] [2022-02-16 14:39:06,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:39:06,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:39:06,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:06,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:39:06,060 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:39:06,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316210775] [2022-02-16 14:39:06,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316210775] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:39:06,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386233190] [2022-02-16 14:39:06,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:39:06,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:06,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:39:06,061 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 14:39:06,062 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 14:39:06,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:39:06,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:39:06,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:39:06,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:39:06,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-16 14:39:06,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:39:06,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:39:06,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386233190] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:39:06,279 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:39:06,279 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 13 [2022-02-16 14:39:06,279 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000507120] [2022-02-16 14:39:06,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:39:06,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 14:39:06,279 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:39:06,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 14:39:06,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-02-16 14:39:06,280 INFO L87 Difference]: Start difference. First operand 30444 states and 82738 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 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 14:39:06,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:39:06,827 INFO L93 Difference]: Finished difference Result 38748 states and 100124 transitions. [2022-02-16 14:39:06,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 14:39:06,827 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 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 28 [2022-02-16 14:39:06,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:39:06,921 INFO L225 Difference]: With dead ends: 38748 [2022-02-16 14:39:06,921 INFO L226 Difference]: Without dead ends: 38748 [2022-02-16 14:39:06,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=556, Unknown=0, NotChecked=0, Total=812 [2022-02-16 14:39:06,922 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 234 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:39:06,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 83 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:39:06,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38748 states. [2022-02-16 14:39:07,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38748 to 31592. [2022-02-16 14:39:07,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31592 states, 31591 states have (on average 2.715995061884714) internal successors, (85801), 31591 states have internal predecessors, (85801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:07,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31592 states to 31592 states and 85801 transitions. [2022-02-16 14:39:07,673 INFO L78 Accepts]: Start accepts. Automaton has 31592 states and 85801 transitions. Word has length 28 [2022-02-16 14:39:07,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:39:07,673 INFO L470 AbstractCegarLoop]: Abstraction has 31592 states and 85801 transitions. [2022-02-16 14:39:07,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 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 14:39:07,673 INFO L276 IsEmpty]: Start isEmpty. Operand 31592 states and 85801 transitions. [2022-02-16 14:39:07,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:39:07,706 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:39:07,706 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:39:07,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-02-16 14:39:07,907 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 14:39:07,907 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:39:07,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:39:07,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1385005828, now seen corresponding path program 65 times [2022-02-16 14:39:07,907 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:39:07,907 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107250860] [2022-02-16 14:39:07,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:39:07,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:39:07,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:07,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:07,956 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:39:07,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107250860] [2022-02-16 14:39:07,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107250860] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:39:07,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970749118] [2022-02-16 14:39:07,956 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:39:07,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:07,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:39:07,957 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 14:39:07,958 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 14:39:07,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:39:07,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:39:07,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:39:07,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:39:08,071 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:39:08,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:39:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:08,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970749118] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:39:08,159 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:39:08,159 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 15 [2022-02-16 14:39:08,159 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162480402] [2022-02-16 14:39:08,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:39:08,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 14:39:08,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:39:08,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 14:39:08,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:39:08,160 INFO L87 Difference]: Start difference. First operand 31592 states and 85801 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 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 14:39:08,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:39:08,979 INFO L93 Difference]: Finished difference Result 40064 states and 106166 transitions. [2022-02-16 14:39:08,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-16 14:39:08,979 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 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 28 [2022-02-16 14:39:08,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:39:09,077 INFO L225 Difference]: With dead ends: 40064 [2022-02-16 14:39:09,077 INFO L226 Difference]: Without dead ends: 40064 [2022-02-16 14:39:09,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=816, Invalid=2844, Unknown=0, NotChecked=0, Total=3660 [2022-02-16 14:39:09,078 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 321 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:39:09,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 154 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:39:09,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40064 states. [2022-02-16 14:39:09,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40064 to 33038. [2022-02-16 14:39:09,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33038 states, 33037 states have (on average 2.7165904894512214) internal successors, (89748), 33037 states have internal predecessors, (89748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:10,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33038 states to 33038 states and 89748 transitions. [2022-02-16 14:39:10,076 INFO L78 Accepts]: Start accepts. Automaton has 33038 states and 89748 transitions. Word has length 28 [2022-02-16 14:39:10,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:39:10,076 INFO L470 AbstractCegarLoop]: Abstraction has 33038 states and 89748 transitions. [2022-02-16 14:39:10,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 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 14:39:10,076 INFO L276 IsEmpty]: Start isEmpty. Operand 33038 states and 89748 transitions. [2022-02-16 14:39:10,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:39:10,119 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:39:10,119 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:39:10,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-02-16 14:39:10,319 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 14:39:10,319 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:39:10,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:39:10,320 INFO L85 PathProgramCache]: Analyzing trace with hash -2012834492, now seen corresponding path program 66 times [2022-02-16 14:39:10,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:39:10,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841343668] [2022-02-16 14:39:10,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:39:10,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:39:10,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:10,360 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:39:10,361 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:39:10,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841343668] [2022-02-16 14:39:10,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841343668] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:39:10,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160456088] [2022-02-16 14:39:10,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:39:10,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:10,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:39:10,362 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 14:39:10,362 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 14:39:10,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 14:39:10,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:39:10,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:39:10,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:39:10,474 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-16 14:39:10,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:39:10,559 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:39:10,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160456088] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:39:10,559 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:39:10,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 15 [2022-02-16 14:39:10,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666247101] [2022-02-16 14:39:10,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:39:10,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 14:39:10,560 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:39:10,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 14:39:10,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:39:10,560 INFO L87 Difference]: Start difference. First operand 33038 states and 89748 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 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 14:39:11,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:39:11,255 INFO L93 Difference]: Finished difference Result 39942 states and 105963 transitions. [2022-02-16 14:39:11,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-16 14:39:11,256 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 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 28 [2022-02-16 14:39:11,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:39:11,555 INFO L225 Difference]: With dead ends: 39942 [2022-02-16 14:39:11,555 INFO L226 Difference]: Without dead ends: 39941 [2022-02-16 14:39:11,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=612, Invalid=2144, Unknown=0, NotChecked=0, Total=2756 [2022-02-16 14:39:11,556 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 355 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:39:11,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 123 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:39:11,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39941 states. [2022-02-16 14:39:12,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39941 to 33038. [2022-02-16 14:39:12,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33038 states, 33037 states have (on average 2.7165602203589914) internal successors, (89747), 33037 states have internal predecessors, (89747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:12,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33038 states to 33038 states and 89747 transitions. [2022-02-16 14:39:12,434 INFO L78 Accepts]: Start accepts. Automaton has 33038 states and 89747 transitions. Word has length 28 [2022-02-16 14:39:12,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:39:12,434 INFO L470 AbstractCegarLoop]: Abstraction has 33038 states and 89747 transitions. [2022-02-16 14:39:12,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 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 14:39:12,434 INFO L276 IsEmpty]: Start isEmpty. Operand 33038 states and 89747 transitions. [2022-02-16 14:39:12,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:39:12,474 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:39:12,474 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:39:12,489 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 14:39:12,674 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 14:39:12,675 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:39:12,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:39:12,675 INFO L85 PathProgramCache]: Analyzing trace with hash 9058752, now seen corresponding path program 67 times [2022-02-16 14:39:12,675 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:39:12,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676225760] [2022-02-16 14:39:12,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:39:12,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:39:12,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:12,716 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:12,716 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:39:12,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676225760] [2022-02-16 14:39:12,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676225760] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:39:12,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504115986] [2022-02-16 14:39:12,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:39:12,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:12,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:39:12,718 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 14:39:12,718 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 14:39:12,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:12,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:39:12,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:39:12,818 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:39:12,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:39:12,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:12,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504115986] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:39:12,904 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:39:12,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 16 [2022-02-16 14:39:12,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524380853] [2022-02-16 14:39:12,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:39:12,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 14:39:12,905 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:39:12,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 14:39:12,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-02-16 14:39:12,905 INFO L87 Difference]: Start difference. First operand 33038 states and 89747 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 14:39:14,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:39:14,175 INFO L93 Difference]: Finished difference Result 41151 states and 108127 transitions. [2022-02-16 14:39:14,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-16 14:39:14,176 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2022-02-16 14:39:14,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:39:14,284 INFO L225 Difference]: With dead ends: 41151 [2022-02-16 14:39:14,284 INFO L226 Difference]: Without dead ends: 41151 [2022-02-16 14:39:14,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2386 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1387, Invalid=4775, Unknown=0, NotChecked=0, Total=6162 [2022-02-16 14:39:14,285 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 417 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:39:14,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 279 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:39:14,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41151 states. [2022-02-16 14:39:15,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41151 to 33126. [2022-02-16 14:39:15,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33126 states, 33125 states have (on average 2.715230188679245) internal successors, (89942), 33125 states have internal predecessors, (89942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:15,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33126 states to 33126 states and 89942 transitions. [2022-02-16 14:39:15,192 INFO L78 Accepts]: Start accepts. Automaton has 33126 states and 89942 transitions. Word has length 28 [2022-02-16 14:39:15,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:39:15,192 INFO L470 AbstractCegarLoop]: Abstraction has 33126 states and 89942 transitions. [2022-02-16 14:39:15,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 14:39:15,193 INFO L276 IsEmpty]: Start isEmpty. Operand 33126 states and 89942 transitions. [2022-02-16 14:39:15,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:39:15,229 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:39:15,229 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:39:15,245 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 14:39:15,429 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 14:39:15,430 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:39:15,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:39:15,430 INFO L85 PathProgramCache]: Analyzing trace with hash -336891904, now seen corresponding path program 68 times [2022-02-16 14:39:15,430 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:39:15,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264924173] [2022-02-16 14:39:15,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:39:15,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:39:15,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:15,485 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:15,485 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:39:15,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264924173] [2022-02-16 14:39:15,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264924173] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:39:15,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541138112] [2022-02-16 14:39:15,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:39:15,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:15,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:39:15,487 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 14:39:15,487 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 14:39:15,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:39:15,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:39:15,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:39:15,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:39:15,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:39:15,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:39:15,668 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:15,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541138112] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:39:15,668 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:39:15,668 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 16 [2022-02-16 14:39:15,668 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802754611] [2022-02-16 14:39:15,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:39:15,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 14:39:15,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:39:15,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 14:39:15,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-02-16 14:39:15,669 INFO L87 Difference]: Start difference. First operand 33126 states and 89942 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 14:39:16,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:39:16,603 INFO L93 Difference]: Finished difference Result 40015 states and 106136 transitions. [2022-02-16 14:39:16,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-16 14:39:16,604 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2022-02-16 14:39:16,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:39:16,716 INFO L225 Difference]: With dead ends: 40015 [2022-02-16 14:39:16,716 INFO L226 Difference]: Without dead ends: 40012 [2022-02-16 14:39:16,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=674, Invalid=2406, Unknown=0, NotChecked=0, Total=3080 [2022-02-16 14:39:16,717 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 306 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:39:16,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 171 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:39:16,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40012 states. [2022-02-16 14:39:17,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40012 to 33036. [2022-02-16 14:39:17,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33036 states, 33035 states have (on average 2.7164825185409414) internal successors, (89739), 33035 states have internal predecessors, (89739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:17,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33036 states to 33036 states and 89739 transitions. [2022-02-16 14:39:17,714 INFO L78 Accepts]: Start accepts. Automaton has 33036 states and 89739 transitions. Word has length 28 [2022-02-16 14:39:17,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:39:17,714 INFO L470 AbstractCegarLoop]: Abstraction has 33036 states and 89739 transitions. [2022-02-16 14:39:17,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 14:39:17,714 INFO L276 IsEmpty]: Start isEmpty. Operand 33036 states and 89739 transitions. [2022-02-16 14:39:17,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:39:17,767 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:39:17,768 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:39:17,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-02-16 14:39:17,968 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 14:39:17,968 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:39:17,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:39:17,969 INFO L85 PathProgramCache]: Analyzing trace with hash -307389576, now seen corresponding path program 69 times [2022-02-16 14:39:17,969 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:39:17,969 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055129663] [2022-02-16 14:39:17,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:39:17,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:39:17,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:18,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:39:18,004 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:39:18,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055129663] [2022-02-16 14:39:18,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055129663] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:39:18,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946401918] [2022-02-16 14:39:18,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:39:18,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:18,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:39:18,006 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 14:39:18,006 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 14:39:18,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:39:18,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:39:18,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:39:18,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:39:18,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:39:18,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:39:18,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:39:18,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946401918] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:39:18,183 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:39:18,183 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-02-16 14:39:18,183 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594943940] [2022-02-16 14:39:18,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:39:18,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 14:39:18,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:39:18,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 14:39:18,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-02-16 14:39:18,184 INFO L87 Difference]: Start difference. First operand 33036 states and 89739 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 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 14:39:18,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:39:18,562 INFO L93 Difference]: Finished difference Result 39132 states and 101721 transitions. [2022-02-16 14:39:18,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 14:39:18,563 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 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 28 [2022-02-16 14:39:18,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:39:18,667 INFO L225 Difference]: With dead ends: 39132 [2022-02-16 14:39:18,667 INFO L226 Difference]: Without dead ends: 39132 [2022-02-16 14:39:18,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:39:18,668 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 172 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:39:18,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 71 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:39:18,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39132 states. [2022-02-16 14:39:19,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39132 to 33480. [2022-02-16 14:39:19,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33480 states, 33479 states have (on average 2.706741539472505) internal successors, (90619), 33479 states have internal predecessors, (90619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:19,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33480 states to 33480 states and 90619 transitions. [2022-02-16 14:39:19,553 INFO L78 Accepts]: Start accepts. Automaton has 33480 states and 90619 transitions. Word has length 28 [2022-02-16 14:39:19,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:39:19,553 INFO L470 AbstractCegarLoop]: Abstraction has 33480 states and 90619 transitions. [2022-02-16 14:39:19,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 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 14:39:19,553 INFO L276 IsEmpty]: Start isEmpty. Operand 33480 states and 90619 transitions. [2022-02-16 14:39:19,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:39:19,590 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:39:19,590 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:39:19,605 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 14:39:19,790 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 14:39:19,790 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:39:19,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:39:19,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1170477820, now seen corresponding path program 70 times [2022-02-16 14:39:19,791 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:39:19,791 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554395575] [2022-02-16 14:39:19,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:39:19,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:39:19,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:19,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:19,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:39:19,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554395575] [2022-02-16 14:39:19,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554395575] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:39:19,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266512746] [2022-02-16 14:39:19,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:39:19,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:19,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:39:19,836 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 14:39:19,837 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 14:39:19,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:39:19,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:39:19,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:39:19,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:39:19,935 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:19,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:39:20,007 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:20,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266512746] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:39:20,007 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:39:20,007 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-02-16 14:39:20,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778903222] [2022-02-16 14:39:20,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:39:20,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 14:39:20,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:39:20,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 14:39:20,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-02-16 14:39:20,008 INFO L87 Difference]: Start difference. First operand 33480 states and 90619 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 14:39:20,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:39:20,891 INFO L93 Difference]: Finished difference Result 40338 states and 106567 transitions. [2022-02-16 14:39:20,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-16 14:39:20,891 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 28 [2022-02-16 14:39:20,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:39:21,000 INFO L225 Difference]: With dead ends: 40338 [2022-02-16 14:39:21,000 INFO L226 Difference]: Without dead ends: 40338 [2022-02-16 14:39:21,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=661, Invalid=2309, Unknown=0, NotChecked=0, Total=2970 [2022-02-16 14:39:21,000 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 244 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:39:21,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 224 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:39:21,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40338 states. [2022-02-16 14:39:21,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40338 to 35142. [2022-02-16 14:39:21,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35142 states, 35141 states have (on average 2.6860647107367464) internal successors, (94391), 35141 states have internal predecessors, (94391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:22,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35142 states to 35142 states and 94391 transitions. [2022-02-16 14:39:22,045 INFO L78 Accepts]: Start accepts. Automaton has 35142 states and 94391 transitions. Word has length 28 [2022-02-16 14:39:22,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:39:22,045 INFO L470 AbstractCegarLoop]: Abstraction has 35142 states and 94391 transitions. [2022-02-16 14:39:22,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 14:39:22,045 INFO L276 IsEmpty]: Start isEmpty. Operand 35142 states and 94391 transitions. [2022-02-16 14:39:22,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:39:22,091 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:39:22,091 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:39:22,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-02-16 14:39:22,292 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 14:39:22,293 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:39:22,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:39:22,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1275495940, now seen corresponding path program 71 times [2022-02-16 14:39:22,293 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:39:22,293 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945779335] [2022-02-16 14:39:22,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:39:22,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:39:22,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:22,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:22,335 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:39:22,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945779335] [2022-02-16 14:39:22,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945779335] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:39:22,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054170065] [2022-02-16 14:39:22,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:39:22,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:22,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:39:22,336 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 14:39:22,337 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 14:39:22,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:39:22,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:39:22,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-16 14:39:22,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:39:22,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:22,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:39:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:22,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054170065] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:39:22,479 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:39:22,479 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-02-16 14:39:22,479 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45540443] [2022-02-16 14:39:22,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:39:22,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 14:39:22,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:39:22,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 14:39:22,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-02-16 14:39:22,479 INFO L87 Difference]: Start difference. First operand 35142 states and 94391 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 14:39:23,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:39:23,069 INFO L93 Difference]: Finished difference Result 39822 states and 104966 transitions. [2022-02-16 14:39:23,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-16 14:39:23,070 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 28 [2022-02-16 14:39:23,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:39:23,183 INFO L225 Difference]: With dead ends: 39822 [2022-02-16 14:39:23,183 INFO L226 Difference]: Without dead ends: 39814 [2022-02-16 14:39:23,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=452, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:39:23,183 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 142 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:39:23,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 126 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:39:23,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39814 states. [2022-02-16 14:39:23,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39814 to 37789. [2022-02-16 14:39:23,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37789 states, 37788 states have (on average 2.6860378956282416) internal successors, (101500), 37788 states have internal predecessors, (101500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:24,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37789 states to 37789 states and 101500 transitions. [2022-02-16 14:39:24,210 INFO L78 Accepts]: Start accepts. Automaton has 37789 states and 101500 transitions. Word has length 28 [2022-02-16 14:39:24,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:39:24,211 INFO L470 AbstractCegarLoop]: Abstraction has 37789 states and 101500 transitions. [2022-02-16 14:39:24,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 14:39:24,211 INFO L276 IsEmpty]: Start isEmpty. Operand 37789 states and 101500 transitions. [2022-02-16 14:39:24,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:39:24,274 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:39:24,274 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:39:24,312 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 14:39:24,474 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 14:39:24,475 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:39:24,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:39:24,475 INFO L85 PathProgramCache]: Analyzing trace with hash -128888832, now seen corresponding path program 72 times [2022-02-16 14:39:24,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:39:24,475 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916463748] [2022-02-16 14:39:24,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:39:24,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:39:24,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:24,517 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:39:24,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916463748] [2022-02-16 14:39:24,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916463748] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:39:24,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331188326] [2022-02-16 14:39:24,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:39:24,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:24,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:39:24,519 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 14:39:24,519 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 14:39:24,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:39:24,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:39:24,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-16 14:39:24,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:39:24,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:24,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:39:24,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:24,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331188326] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:39:24,674 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:39:24,674 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-02-16 14:39:24,674 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014349238] [2022-02-16 14:39:24,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:39:24,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 14:39:24,674 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:39:24,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 14:39:24,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-02-16 14:39:24,674 INFO L87 Difference]: Start difference. First operand 37789 states and 101500 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 14:39:25,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:39:25,142 INFO L93 Difference]: Finished difference Result 40449 states and 106085 transitions. [2022-02-16 14:39:25,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 14:39:25,143 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 28 [2022-02-16 14:39:25,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:39:25,257 INFO L225 Difference]: With dead ends: 40449 [2022-02-16 14:39:25,258 INFO L226 Difference]: Without dead ends: 40449 [2022-02-16 14:39:25,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2022-02-16 14:39:25,258 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 130 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:39:25,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 167 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:39:25,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40449 states. [2022-02-16 14:39:26,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40449 to 37825. [2022-02-16 14:39:26,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37825 states, 37824 states have (on average 2.68242385786802) internal successors, (101460), 37824 states have internal predecessors, (101460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:26,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37825 states to 37825 states and 101460 transitions. [2022-02-16 14:39:26,278 INFO L78 Accepts]: Start accepts. Automaton has 37825 states and 101460 transitions. Word has length 28 [2022-02-16 14:39:26,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:39:26,278 INFO L470 AbstractCegarLoop]: Abstraction has 37825 states and 101460 transitions. [2022-02-16 14:39:26,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 14:39:26,278 INFO L276 IsEmpty]: Start isEmpty. Operand 37825 states and 101460 transitions. [2022-02-16 14:39:26,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:39:26,330 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:39:26,330 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:39:26,346 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 14:39:26,535 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 14:39:26,535 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:39:26,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:39:26,536 INFO L85 PathProgramCache]: Analyzing trace with hash 542649156, now seen corresponding path program 73 times [2022-02-16 14:39:26,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:39:26,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400245395] [2022-02-16 14:39:26,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:39:26,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:39:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:26,580 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:26,580 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:39:26,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400245395] [2022-02-16 14:39:26,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400245395] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:39:26,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860962941] [2022-02-16 14:39:26,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:39:26,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:26,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:39:26,582 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 14:39:26,583 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 14:39:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:26,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:39:26,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:39:26,673 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:26,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:39:26,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:26,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860962941] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:39:26,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:39:26,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-02-16 14:39:26,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731823398] [2022-02-16 14:39:26,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:39:26,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 14:39:26,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:39:26,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 14:39:26,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-02-16 14:39:26,748 INFO L87 Difference]: Start difference. First operand 37825 states and 101460 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 14:39:27,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:39:27,596 INFO L93 Difference]: Finished difference Result 43346 states and 114426 transitions. [2022-02-16 14:39:27,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-16 14:39:27,596 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 28 [2022-02-16 14:39:27,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:39:27,726 INFO L225 Difference]: With dead ends: 43346 [2022-02-16 14:39:27,726 INFO L226 Difference]: Without dead ends: 43344 [2022-02-16 14:39:27,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=1605, Unknown=0, NotChecked=0, Total=2070 [2022-02-16 14:39:27,727 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 263 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:39:27,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 182 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:39:27,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43344 states. [2022-02-16 14:39:28,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43344 to 37825. [2022-02-16 14:39:28,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37825 states, 37824 states have (on average 2.682370981387479) internal successors, (101458), 37824 states have internal predecessors, (101458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:28,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37825 states to 37825 states and 101458 transitions. [2022-02-16 14:39:28,881 INFO L78 Accepts]: Start accepts. Automaton has 37825 states and 101458 transitions. Word has length 28 [2022-02-16 14:39:28,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:39:28,881 INFO L470 AbstractCegarLoop]: Abstraction has 37825 states and 101458 transitions. [2022-02-16 14:39:28,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 14:39:28,881 INFO L276 IsEmpty]: Start isEmpty. Operand 37825 states and 101458 transitions. [2022-02-16 14:39:28,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:39:28,933 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:39:28,933 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:39:28,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-02-16 14:39:29,133 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 14:39:29,133 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:39:29,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:39:29,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1155329728, now seen corresponding path program 74 times [2022-02-16 14:39:29,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:39:29,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147942695] [2022-02-16 14:39:29,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:39:29,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:39:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:29,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:39:29,175 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:39:29,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147942695] [2022-02-16 14:39:29,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147942695] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:39:29,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527447707] [2022-02-16 14:39:29,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:39:29,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:29,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:39:29,176 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 14:39:29,177 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 14:39:29,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:39:29,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:39:29,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-16 14:39:29,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:39:29,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:39:29,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:39:29,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:39:29,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527447707] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:39:29,322 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:39:29,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-02-16 14:39:29,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071753352] [2022-02-16 14:39:29,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:39:29,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 14:39:29,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:39:29,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 14:39:29,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-16 14:39:29,322 INFO L87 Difference]: Start difference. First operand 37825 states and 101458 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 14:39:29,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:39:29,731 INFO L93 Difference]: Finished difference Result 41876 states and 109921 transitions. [2022-02-16 14:39:29,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 14:39:29,731 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 28 [2022-02-16 14:39:29,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:39:29,843 INFO L225 Difference]: With dead ends: 41876 [2022-02-16 14:39:29,844 INFO L226 Difference]: Without dead ends: 41876 [2022-02-16 14:39:29,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=199, Invalid=451, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:39:29,844 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 116 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:39:29,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 133 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:39:29,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41876 states. [2022-02-16 14:39:30,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41876 to 38737. [2022-02-16 14:39:30,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38737 states, 38736 states have (on average 2.682285212722016) internal successors, (103901), 38736 states have internal predecessors, (103901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:30,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38737 states to 38737 states and 103901 transitions. [2022-02-16 14:39:30,810 INFO L78 Accepts]: Start accepts. Automaton has 38737 states and 103901 transitions. Word has length 28 [2022-02-16 14:39:30,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:39:30,810 INFO L470 AbstractCegarLoop]: Abstraction has 38737 states and 103901 transitions. [2022-02-16 14:39:30,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 14:39:30,810 INFO L276 IsEmpty]: Start isEmpty. Operand 38737 states and 103901 transitions. [2022-02-16 14:39:30,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:39:30,854 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:39:30,854 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:39:30,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-02-16 14:39:31,054 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 14:39:31,055 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:39:31,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:39:31,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1632581576, now seen corresponding path program 75 times [2022-02-16 14:39:31,055 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:39:31,055 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853639757] [2022-02-16 14:39:31,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:39:31,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:39:31,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:39:31,093 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:39:31,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853639757] [2022-02-16 14:39:31,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853639757] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:39:31,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279878608] [2022-02-16 14:39:31,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:39:31,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:31,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:39:31,094 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 14:39:31,095 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 14:39:31,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:39:31,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:39:31,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:39:31,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:39:31,185 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:39:31,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:39:31,257 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:39:31,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279878608] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:39:31,258 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:39:31,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-02-16 14:39:31,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645899839] [2022-02-16 14:39:31,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:39:31,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 14:39:31,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:39:31,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 14:39:31,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-02-16 14:39:31,258 INFO L87 Difference]: Start difference. First operand 38737 states and 103901 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 14:39:32,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:39:32,033 INFO L93 Difference]: Finished difference Result 44536 states and 117625 transitions. [2022-02-16 14:39:32,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-16 14:39:32,033 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 28 [2022-02-16 14:39:32,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:39:32,142 INFO L225 Difference]: With dead ends: 44536 [2022-02-16 14:39:32,143 INFO L226 Difference]: Without dead ends: 44533 [2022-02-16 14:39:32,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=1469, Unknown=0, NotChecked=0, Total=1892 [2022-02-16 14:39:32,143 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 313 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:39:32,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 135 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:39:32,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44533 states. [2022-02-16 14:39:33,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44533 to 38775. [2022-02-16 14:39:33,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38775 states, 38774 states have (on average 2.681848661474184) internal successors, (103986), 38774 states have internal predecessors, (103986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:33,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38775 states to 38775 states and 103986 transitions. [2022-02-16 14:39:33,171 INFO L78 Accepts]: Start accepts. Automaton has 38775 states and 103986 transitions. Word has length 28 [2022-02-16 14:39:33,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:39:33,171 INFO L470 AbstractCegarLoop]: Abstraction has 38775 states and 103986 transitions. [2022-02-16 14:39:33,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 14:39:33,171 INFO L276 IsEmpty]: Start isEmpty. Operand 38775 states and 103986 transitions. [2022-02-16 14:39:33,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:39:33,225 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:39:33,225 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:39:33,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-02-16 14:39:33,426 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 14:39:33,426 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:39:33,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:39:33,426 INFO L85 PathProgramCache]: Analyzing trace with hash -501936704, now seen corresponding path program 76 times [2022-02-16 14:39:33,426 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:39:33,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775213328] [2022-02-16 14:39:33,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:39:33,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:39:33,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:33,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:33,489 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:39:33,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775213328] [2022-02-16 14:39:33,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775213328] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:39:33,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286426218] [2022-02-16 14:39:33,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:39:33,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:33,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:39:33,490 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 14:39:33,491 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 14:39:33,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:39:33,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:39:33,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-16 14:39:33,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:39:33,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:33,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:39:33,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:33,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286426218] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:39:33,642 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:39:33,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 13 [2022-02-16 14:39:33,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170769707] [2022-02-16 14:39:33,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:39:33,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 14:39:33,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:39:33,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 14:39:33,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-02-16 14:39:33,643 INFO L87 Difference]: Start difference. First operand 38775 states and 103986 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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 14:39:34,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:39:34,080 INFO L93 Difference]: Finished difference Result 42177 states and 110706 transitions. [2022-02-16 14:39:34,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 14:39:34,081 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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 28 [2022-02-16 14:39:34,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:39:34,201 INFO L225 Difference]: With dead ends: 42177 [2022-02-16 14:39:34,201 INFO L226 Difference]: Without dead ends: 42177 [2022-02-16 14:39:34,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=251, Invalid=561, Unknown=0, NotChecked=0, Total=812 [2022-02-16 14:39:34,202 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 110 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:39:34,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 97 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:39:34,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42177 states. [2022-02-16 14:39:35,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42177 to 38778. [2022-02-16 14:39:35,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38778 states, 38777 states have (on average 2.681099620909302) internal successors, (103965), 38777 states have internal predecessors, (103965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:35,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38778 states to 38778 states and 103965 transitions. [2022-02-16 14:39:35,306 INFO L78 Accepts]: Start accepts. Automaton has 38778 states and 103965 transitions. Word has length 28 [2022-02-16 14:39:35,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:39:35,306 INFO L470 AbstractCegarLoop]: Abstraction has 38778 states and 103965 transitions. [2022-02-16 14:39:35,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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 14:39:35,306 INFO L276 IsEmpty]: Start isEmpty. Operand 38778 states and 103965 transitions. [2022-02-16 14:39:35,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:39:35,361 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:39:35,361 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:39:35,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-02-16 14:39:35,561 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 14:39:35,562 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:39:35,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:39:35,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1773022916, now seen corresponding path program 77 times [2022-02-16 14:39:35,562 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:39:35,562 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552560983] [2022-02-16 14:39:35,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:39:35,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:39:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:35,607 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:35,607 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:39:35,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552560983] [2022-02-16 14:39:35,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552560983] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:39:35,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593543951] [2022-02-16 14:39:35,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:39:35,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:35,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:39:35,609 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 14:39:35,637 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 14:39:35,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:39:35,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:39:35,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:39:35,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:39:35,770 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:35,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:39:35,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:39:35,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593543951] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:39:35,888 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:39:35,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-02-16 14:39:35,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266856259] [2022-02-16 14:39:35,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:39:35,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 14:39:35,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:39:35,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 14:39:35,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-02-16 14:39:35,889 INFO L87 Difference]: Start difference. First operand 38778 states and 103965 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:39,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:39:39,301 INFO L93 Difference]: Finished difference Result 74380 states and 195382 transitions. [2022-02-16 14:39:39,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-02-16 14:39:39,302 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-16 14:39:39,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:39:39,557 INFO L225 Difference]: With dead ends: 74380 [2022-02-16 14:39:39,558 INFO L226 Difference]: Without dead ends: 74380 [2022-02-16 14:39:39,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11496 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5662, Invalid=21398, Unknown=0, NotChecked=0, Total=27060 [2022-02-16 14:39:39,559 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 706 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 1507 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-16 14:39:39,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [706 Valid, 426 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1507 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-16 14:39:39,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74380 states. [2022-02-16 14:39:40,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74380 to 41812. [2022-02-16 14:39:40,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41812 states, 41811 states have (on average 2.704455765229246) internal successors, (113076), 41811 states have internal predecessors, (113076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:41,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41812 states to 41812 states and 113076 transitions. [2022-02-16 14:39:41,104 INFO L78 Accepts]: Start accepts. Automaton has 41812 states and 113076 transitions. Word has length 28 [2022-02-16 14:39:41,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:39:41,104 INFO L470 AbstractCegarLoop]: Abstraction has 41812 states and 113076 transitions. [2022-02-16 14:39:41,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:41,104 INFO L276 IsEmpty]: Start isEmpty. Operand 41812 states and 113076 transitions. [2022-02-16 14:39:41,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:39:41,321 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:39:41,322 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:39:41,345 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 14:39:41,543 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 14:39:41,543 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:39:41,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:39:41,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1254186894, now seen corresponding path program 78 times [2022-02-16 14:39:41,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:39:41,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793313725] [2022-02-16 14:39:41,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:39:41,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:39:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:41,608 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:41,608 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:39:41,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793313725] [2022-02-16 14:39:41,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793313725] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:39:41,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200854966] [2022-02-16 14:39:41,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:39:41,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:41,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:39:41,609 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 14:39:41,610 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 14:39:41,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:39:41,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:39:41,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:39:41,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:39:41,769 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:41,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:39:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:39:41,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200854966] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:39:41,896 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:39:41,896 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2022-02-16 14:39:41,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048606016] [2022-02-16 14:39:41,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:39:41,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 14:39:41,896 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:39:41,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 14:39:41,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:39:41,897 INFO L87 Difference]: Start difference. First operand 41812 states and 113076 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 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 14:39:44,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:39:44,319 INFO L93 Difference]: Finished difference Result 60713 states and 155592 transitions. [2022-02-16 14:39:44,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-02-16 14:39:44,319 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 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 28 [2022-02-16 14:39:44,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:39:44,489 INFO L225 Difference]: With dead ends: 60713 [2022-02-16 14:39:44,489 INFO L226 Difference]: Without dead ends: 60713 [2022-02-16 14:39:44,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6611 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3388, Invalid=13382, Unknown=0, NotChecked=0, Total=16770 [2022-02-16 14:39:44,490 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 698 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:39:44,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [698 Valid, 318 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1028 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:39:44,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60713 states. [2022-02-16 14:39:45,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60713 to 41812. [2022-02-16 14:39:45,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41812 states, 41811 states have (on average 2.704455765229246) internal successors, (113076), 41811 states have internal predecessors, (113076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:45,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41812 states to 41812 states and 113076 transitions. [2022-02-16 14:39:45,754 INFO L78 Accepts]: Start accepts. Automaton has 41812 states and 113076 transitions. Word has length 28 [2022-02-16 14:39:45,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:39:45,754 INFO L470 AbstractCegarLoop]: Abstraction has 41812 states and 113076 transitions. [2022-02-16 14:39:45,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 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 14:39:45,754 INFO L276 IsEmpty]: Start isEmpty. Operand 41812 states and 113076 transitions. [2022-02-16 14:39:45,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:39:45,812 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:39:45,813 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:39:45,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-02-16 14:39:46,023 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 14:39:46,023 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:39:46,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:39:46,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1478153354, now seen corresponding path program 79 times [2022-02-16 14:39:46,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:39:46,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939089596] [2022-02-16 14:39:46,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:39:46,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:39:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:46,069 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:39:46,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939089596] [2022-02-16 14:39:46,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939089596] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:39:46,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455588898] [2022-02-16 14:39:46,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:39:46,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:46,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:39:46,071 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 14:39:46,071 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 14:39:46,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:46,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:39:46,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:39:46,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:46,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:39:46,315 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:39:46,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455588898] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:39:46,315 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:39:46,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2022-02-16 14:39:46,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92897771] [2022-02-16 14:39:46,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:39:46,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 14:39:46,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:39:46,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 14:39:46,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:39:46,316 INFO L87 Difference]: Start difference. First operand 41812 states and 113076 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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 14:39:48,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:39:48,200 INFO L93 Difference]: Finished difference Result 55325 states and 145109 transitions. [2022-02-16 14:39:48,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-02-16 14:39:48,201 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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 28 [2022-02-16 14:39:48,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:39:48,372 INFO L225 Difference]: With dead ends: 55325 [2022-02-16 14:39:48,372 INFO L226 Difference]: Without dead ends: 55325 [2022-02-16 14:39:48,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3733 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1907, Invalid=7993, Unknown=0, NotChecked=0, Total=9900 [2022-02-16 14:39:48,373 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 473 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:39:48,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 383 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:39:48,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55325 states. [2022-02-16 14:39:49,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55325 to 42071. [2022-02-16 14:39:49,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42071 states, 42070 states have (on average 2.705181839790825) internal successors, (113807), 42070 states have internal predecessors, (113807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:49,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42071 states to 42071 states and 113807 transitions. [2022-02-16 14:39:49,715 INFO L78 Accepts]: Start accepts. Automaton has 42071 states and 113807 transitions. Word has length 28 [2022-02-16 14:39:49,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:39:49,716 INFO L470 AbstractCegarLoop]: Abstraction has 42071 states and 113807 transitions. [2022-02-16 14:39:49,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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 14:39:49,716 INFO L276 IsEmpty]: Start isEmpty. Operand 42071 states and 113807 transitions. [2022-02-16 14:39:49,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:39:49,772 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:39:49,772 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:39:49,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-02-16 14:39:49,972 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 14:39:49,972 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:39:49,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:39:49,973 INFO L85 PathProgramCache]: Analyzing trace with hash 353344692, now seen corresponding path program 80 times [2022-02-16 14:39:49,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:39:49,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952261582] [2022-02-16 14:39:49,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:39:49,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:39:49,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:50,016 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:50,016 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:39:50,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952261582] [2022-02-16 14:39:50,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952261582] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:39:50,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382546489] [2022-02-16 14:39:50,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:39:50,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:50,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:39:50,018 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 14:39:50,018 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 14:39:50,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:39:50,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:39:50,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:39:50,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:39:50,170 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:50,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:39:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:50,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382546489] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:39:50,462 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:39:50,462 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2022-02-16 14:39:50,462 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087207722] [2022-02-16 14:39:50,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:39:50,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 14:39:50,462 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:39:50,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 14:39:50,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2022-02-16 14:39:50,462 INFO L87 Difference]: Start difference. First operand 42071 states and 113807 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:53,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:39:53,364 INFO L93 Difference]: Finished difference Result 89862 states and 234424 transitions. [2022-02-16 14:39:53,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-02-16 14:39:53,365 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-16 14:39:53,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:39:53,643 INFO L225 Difference]: With dead ends: 89862 [2022-02-16 14:39:53,643 INFO L226 Difference]: Without dead ends: 89862 [2022-02-16 14:39:53,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9898 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5028, Invalid=17322, Unknown=0, NotChecked=0, Total=22350 [2022-02-16 14:39:53,644 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 776 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:39:53,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [776 Valid, 316 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 14:39:53,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89862 states. [2022-02-16 14:39:55,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89862 to 53927. [2022-02-16 14:39:55,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53927 states, 53926 states have (on average 2.749490041909283) internal successors, (148269), 53926 states have internal predecessors, (148269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:55,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53927 states to 53927 states and 148269 transitions. [2022-02-16 14:39:55,605 INFO L78 Accepts]: Start accepts. Automaton has 53927 states and 148269 transitions. Word has length 28 [2022-02-16 14:39:55,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:39:55,605 INFO L470 AbstractCegarLoop]: Abstraction has 53927 states and 148269 transitions. [2022-02-16 14:39:55,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:55,605 INFO L276 IsEmpty]: Start isEmpty. Operand 53927 states and 148269 transitions. [2022-02-16 14:39:55,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:39:55,674 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:39:55,674 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:39:55,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-02-16 14:39:55,874 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 14:39:55,874 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:39:55,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:39:55,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1496402892, now seen corresponding path program 81 times [2022-02-16 14:39:55,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:39:55,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109152555] [2022-02-16 14:39:55,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:39:55,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:39:55,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:55,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:55,908 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:39:55,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109152555] [2022-02-16 14:39:55,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109152555] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:39:55,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896755395] [2022-02-16 14:39:55,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:39:55,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:55,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:39:55,909 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 14:39:55,910 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 14:39:55,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:39:55,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:39:55,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:39:55,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:39:56,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:39:56,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:39:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:56,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896755395] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:39:56,114 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:39:56,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2022-02-16 14:39:56,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965852920] [2022-02-16 14:39:56,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:39:56,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 14:39:56,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:39:56,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 14:39:56,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:39:56,115 INFO L87 Difference]: Start difference. First operand 53927 states and 148269 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 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 14:39:56,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:39:56,815 INFO L93 Difference]: Finished difference Result 62599 states and 165173 transitions. [2022-02-16 14:39:56,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-16 14:39:56,815 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 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 28 [2022-02-16 14:39:56,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:39:56,993 INFO L225 Difference]: With dead ends: 62599 [2022-02-16 14:39:56,993 INFO L226 Difference]: Without dead ends: 62597 [2022-02-16 14:39:56,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2022-02-16 14:39:56,993 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 264 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:39:56,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 74 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:39:57,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62597 states. [2022-02-16 14:39:58,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62597 to 53965. [2022-02-16 14:39:58,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53965 states, 53964 states have (on average 2.7482210362463864) internal successors, (148305), 53964 states have internal predecessors, (148305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:58,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53965 states to 53965 states and 148305 transitions. [2022-02-16 14:39:58,773 INFO L78 Accepts]: Start accepts. Automaton has 53965 states and 148305 transitions. Word has length 28 [2022-02-16 14:39:58,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:39:58,773 INFO L470 AbstractCegarLoop]: Abstraction has 53965 states and 148305 transitions. [2022-02-16 14:39:58,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 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 14:39:58,773 INFO L276 IsEmpty]: Start isEmpty. Operand 53965 states and 148305 transitions. [2022-02-16 14:39:58,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:39:58,850 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:39:58,850 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:39:58,866 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 14:39:59,050 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 14:39:59,050 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:39:59,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:39:59,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1155955964, now seen corresponding path program 82 times [2022-02-16 14:39:59,051 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:39:59,051 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597454016] [2022-02-16 14:39:59,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:39:59,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:39:59,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:59,094 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:59,095 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:39:59,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597454016] [2022-02-16 14:39:59,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597454016] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:39:59,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333452069] [2022-02-16 14:39:59,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:39:59,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:59,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:39:59,096 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 14:39:59,096 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 14:39:59,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:39:59,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:39:59,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:39:59,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:39:59,213 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:59,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:39:59,323 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:59,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333452069] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:39:59,323 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:39:59,324 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 20 [2022-02-16 14:39:59,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255993854] [2022-02-16 14:39:59,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:39:59,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 14:39:59,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:39:59,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 14:39:59,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:39:59,324 INFO L87 Difference]: Start difference. First operand 53965 states and 148305 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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 14:40:01,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:40:01,537 INFO L93 Difference]: Finished difference Result 89565 states and 232877 transitions. [2022-02-16 14:40:01,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-02-16 14:40:01,538 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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 28 [2022-02-16 14:40:01,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted.