/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/parallel/misc-5.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-16 14:00:25,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-16 14:00:25,089 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-16 14:00:25,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-16 14:00:25,214 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 14:00:25,239 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-16 14:00:25,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-16 14:00:25,240 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-16 14:00:25,240 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-16 14:00:25,240 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-16 14:00:25,241 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-16 14:00:25,241 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-16 14:00:25,241 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-16 14:00:25,241 INFO L138 SettingsManager]: * Use SBE=true [2022-02-16 14:00:25,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-16 14:00:25,242 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-16 14:00:25,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-16 14:00:25,242 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-16 14:00:25,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-16 14:00:25,242 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-16 14:00:25,242 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-16 14:00:25,242 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-16 14:00:25,242 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-16 14:00:25,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-16 14:00:25,243 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-16 14:00:25,243 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-16 14:00:25,243 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-16 14:00:25,243 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-16 14:00:25,243 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-16 14:00:25,243 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-16 14:00:25,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-16 14:00:25,244 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-16 14:00:25,244 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-16 14:00:25,244 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-16 14:00:25,244 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-16 14:00:25,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-16 14:00:25,244 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-16 14:00:25,244 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-16 14:00:25,244 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITH_DEPRANKS [2022-02-16 14:00:25,244 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-16 14:00:25,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-16 14:00:25,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-16 14:00:25,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-16 14:00:25,482 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-16 14:00:25,483 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-16 14:00:25,484 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-5.wvr.bpl [2022-02-16 14:00:25,484 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-5.wvr.bpl' [2022-02-16 14:00:25,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-16 14:00:25,508 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-16 14:00:25,510 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-16 14:00:25,510 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-16 14:00:25,510 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-16 14:00:25,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:00:25" (1/1) ... [2022-02-16 14:00:25,528 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:00:25" (1/1) ... [2022-02-16 14:00:25,534 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-16 14:00:25,536 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-16 14:00:25,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-16 14:00:25,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-16 14:00:25,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-16 14:00:25,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:00:25" (1/1) ... [2022-02-16 14:00:25,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:00:25" (1/1) ... [2022-02-16 14:00:25,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:00:25" (1/1) ... [2022-02-16 14:00:25,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:00:25" (1/1) ... [2022-02-16 14:00:25,549 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:00:25" (1/1) ... [2022-02-16 14:00:25,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:00:25" (1/1) ... [2022-02-16 14:00:25,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:00:25" (1/1) ... [2022-02-16 14:00:25,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-16 14:00:25,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-16 14:00:25,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-16 14:00:25,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-16 14:00:25,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:00:25" (1/1) ... [2022-02-16 14:00:25,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-16 14:00:25,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:25,593 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 14:00:25,601 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 14:00:25,629 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-16 14:00:25,630 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-16 14:00:25,630 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-16 14:00:25,630 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-16 14:00:25,630 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-16 14:00:25,630 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-16 14:00:25,630 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-16 14:00:25,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-16 14:00:25,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-16 14:00:25,631 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-16 14:00:25,632 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-16 14:00:25,632 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-16 14:00:25,633 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 14:00:25,671 INFO L234 CfgBuilder]: Building ICFG [2022-02-16 14:00:25,673 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-16 14:00:25,799 INFO L275 CfgBuilder]: Performing block encoding [2022-02-16 14:00:25,837 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-16 14:00:25,837 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-16 14:00:25,839 INFO L202 PluginConnector]: Adding new model misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:00:25 BoogieIcfgContainer [2022-02-16 14:00:25,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-16 14:00:25,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-16 14:00:25,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-16 14:00:25,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-16 14:00:25,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:00:25" (1/2) ... [2022-02-16 14:00:25,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48e40ac and model type misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 02:00:25, skipping insertion in model container [2022-02-16 14:00:25,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:00:25" (2/2) ... [2022-02-16 14:00:25,849 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-5.wvr.bpl [2022-02-16 14:00:25,855 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-16 14:00:25,855 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-16 14:00:25,855 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-16 14:00:25,856 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-16 14:00:25,919 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-02-16 14:00:25,991 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-16 14:00:25,997 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 14:00:25,997 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-16 14:00:26,005 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 23 transitions, 70 flow [2022-02-16 14:00:26,049 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 87 states, 86 states have (on average 2.616279069767442) internal successors, (225), 86 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:26,854 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 34218 transitions and produced 14920 states. [2022-02-16 14:00:26,937 INFO L276 IsEmpty]: Start isEmpty. Operand has 14920 states, 9016 states have (on average 2.0236246672582077) internal successors, (18245), 14919 states have internal predecessors, (18245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:27,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 14:00:27,054 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:27,055 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:27,055 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:27,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:27,063 INFO L85 PathProgramCache]: Analyzing trace with hash 698134228, now seen corresponding path program 1 times [2022-02-16 14:00:27,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:27,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616687125] [2022-02-16 14:00:27,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:27,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:27,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:27,257 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 14:00:27,258 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:27,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616687125] [2022-02-16 14:00:27,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616687125] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 14:00:27,259 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 14:00:27,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-16 14:00:27,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297029508] [2022-02-16 14:00:27,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 14:00:27,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-16 14:00:27,265 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:27,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-16 14:00:27,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-16 14:00:27,357 INFO L87 Difference]: Start difference. First operand has 14920 states, 9016 states have (on average 2.0236246672582077) internal successors, (18245), 14919 states have internal predecessors, (18245), 0 states have call successors, (0), 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 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:27,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:27,486 INFO L93 Difference]: Finished difference Result 4924 states and 6194 transitions. [2022-02-16 14:00:27,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-16 14:00:27,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 14:00:27,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:27,554 INFO L225 Difference]: With dead ends: 4924 [2022-02-16 14:00:27,554 INFO L226 Difference]: Without dead ends: 1163 [2022-02-16 14:00:27,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-16 14:00:27,581 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:27,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 14 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:00:27,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2022-02-16 14:00:27,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 28. [2022-02-16 14:00:27,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 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 14:00:27,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2022-02-16 14:00:27,678 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 14 [2022-02-16 14:00:27,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:27,678 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2022-02-16 14:00:27,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:27,679 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2022-02-16 14:00:27,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 14:00:27,679 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:27,680 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:27,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-16 14:00:27,680 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:27,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:27,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1943158732, now seen corresponding path program 2 times [2022-02-16 14:00:27,681 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:27,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947401208] [2022-02-16 14:00:27,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:27,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:27,752 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 14:00:27,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:27,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947401208] [2022-02-16 14:00:27,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947401208] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 14:00:27,753 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 14:00:27,753 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-16 14:00:27,753 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239896783] [2022-02-16 14:00:27,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 14:00:27,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-16 14:00:27,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:27,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-16 14:00:27,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-16 14:00:27,756 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:27,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:27,803 INFO L93 Difference]: Finished difference Result 41 states and 60 transitions. [2022-02-16 14:00:27,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-16 14:00:27,804 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 14:00:27,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:27,804 INFO L225 Difference]: With dead ends: 41 [2022-02-16 14:00:27,804 INFO L226 Difference]: Without dead ends: 33 [2022-02-16 14:00:27,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 14:00:27,806 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:27,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 17 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:00:27,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-16 14:00:27,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-02-16 14:00:27,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.53125) internal successors, (49), 32 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 14:00:27,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2022-02-16 14:00:27,810 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 14 [2022-02-16 14:00:27,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:27,810 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2022-02-16 14:00:27,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:27,811 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2022-02-16 14:00:27,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 14:00:27,811 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:27,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:27,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-16 14:00:27,812 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:27,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:27,812 INFO L85 PathProgramCache]: Analyzing trace with hash 285997262, now seen corresponding path program 1 times [2022-02-16 14:00:27,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:27,813 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896815655] [2022-02-16 14:00:27,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:27,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:27,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:27,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:27,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:27,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896815655] [2022-02-16 14:00:27,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896815655] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:27,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107243221] [2022-02-16 14:00:27,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:27,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:27,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:27,875 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 14:00:27,886 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 14:00:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:27,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-16 14:00:27,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:00:28,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:28,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:00:28,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:28,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107243221] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:28,219 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:28,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-02-16 14:00:28,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268899500] [2022-02-16 14:00:28,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:28,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-16 14:00:28,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:28,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-16 14:00:28,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-02-16 14:00:28,221 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:28,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:28,345 INFO L93 Difference]: Finished difference Result 94 states and 137 transitions. [2022-02-16 14:00:28,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 14:00:28,346 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 14:00:28,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:28,347 INFO L225 Difference]: With dead ends: 94 [2022-02-16 14:00:28,347 INFO L226 Difference]: Without dead ends: 81 [2022-02-16 14:00:28,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-02-16 14:00:28,348 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 46 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:28,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 45 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:00:28,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-02-16 14:00:28,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 48. [2022-02-16 14:00:28,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.6808510638297873) internal successors, (79), 47 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:28,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 79 transitions. [2022-02-16 14:00:28,353 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 79 transitions. Word has length 16 [2022-02-16 14:00:28,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:28,354 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 79 transitions. [2022-02-16 14:00:28,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:28,354 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 79 transitions. [2022-02-16 14:00:28,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 14:00:28,355 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:28,355 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:28,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-16 14:00:28,568 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 14:00:28,568 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:28,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:28,569 INFO L85 PathProgramCache]: Analyzing trace with hash -2090510002, now seen corresponding path program 1 times [2022-02-16 14:00:28,570 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:28,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023073036] [2022-02-16 14:00:28,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:28,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:28,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:28,621 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:28,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023073036] [2022-02-16 14:00:28,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023073036] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 14:00:28,621 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 14:00:28,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-16 14:00:28,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401941454] [2022-02-16 14:00:28,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 14:00:28,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-16 14:00:28,622 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:28,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-16 14:00:28,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-16 14:00:28,623 INFO L87 Difference]: Start difference. First operand 48 states and 79 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:28,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:28,673 INFO L93 Difference]: Finished difference Result 57 states and 87 transitions. [2022-02-16 14:00:28,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-16 14:00:28,674 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 14:00:28,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:28,674 INFO L225 Difference]: With dead ends: 57 [2022-02-16 14:00:28,674 INFO L226 Difference]: Without dead ends: 49 [2022-02-16 14:00:28,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-16 14:00:28,677 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:28,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 23 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:00:28,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-02-16 14:00:28,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-02-16 14:00:28,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 47 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:28,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 75 transitions. [2022-02-16 14:00:28,685 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 75 transitions. Word has length 16 [2022-02-16 14:00:28,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:28,686 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 75 transitions. [2022-02-16 14:00:28,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:28,686 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 75 transitions. [2022-02-16 14:00:28,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 14:00:28,686 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:28,687 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:28,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-16 14:00:28,688 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:28,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:28,690 INFO L85 PathProgramCache]: Analyzing trace with hash -90695088, now seen corresponding path program 2 times [2022-02-16 14:00:28,690 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:28,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129699316] [2022-02-16 14:00:28,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:28,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:28,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:28,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:28,760 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:28,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129699316] [2022-02-16 14:00:28,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129699316] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:28,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750433631] [2022-02-16 14:00:28,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:00:28,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:28,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:28,762 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 14:00:28,763 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 14:00:28,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:00:28,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:00:28,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:00:28,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:00:28,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:28,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:00:29,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:29,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750433631] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:29,115 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:29,115 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-02-16 14:00:29,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554746675] [2022-02-16 14:00:29,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:29,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-16 14:00:29,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:29,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-16 14:00:29,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-02-16 14:00:29,117 INFO L87 Difference]: Start difference. First operand 48 states and 75 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:29,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:29,357 INFO L93 Difference]: Finished difference Result 129 states and 195 transitions. [2022-02-16 14:00:29,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 14:00:29,358 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 18 [2022-02-16 14:00:29,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:29,358 INFO L225 Difference]: With dead ends: 129 [2022-02-16 14:00:29,359 INFO L226 Difference]: Without dead ends: 109 [2022-02-16 14:00:29,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2022-02-16 14:00:29,359 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 54 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:29,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 103 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:00:29,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-02-16 14:00:29,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 66. [2022-02-16 14:00:29,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.6923076923076923) internal successors, (110), 65 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:29,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 110 transitions. [2022-02-16 14:00:29,364 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 110 transitions. Word has length 18 [2022-02-16 14:00:29,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:29,364 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 110 transitions. [2022-02-16 14:00:29,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:29,364 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 110 transitions. [2022-02-16 14:00:29,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 14:00:29,365 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:29,365 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:29,427 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 14:00:29,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:29,566 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:29,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:29,566 INFO L85 PathProgramCache]: Analyzing trace with hash -829628078, now seen corresponding path program 2 times [2022-02-16 14:00:29,566 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:29,567 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602420473] [2022-02-16 14:00:29,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:29,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:29,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:29,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:29,646 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:29,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602420473] [2022-02-16 14:00:29,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602420473] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:29,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849834415] [2022-02-16 14:00:29,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:00:29,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:29,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:29,652 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 14:00:29,653 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 14:00:29,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:00:29,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:00:29,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-16 14:00:29,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:00:29,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:29,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:00:30,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:30,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849834415] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:30,115 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:30,115 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-02-16 14:00:30,115 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673894773] [2022-02-16 14:00:30,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:30,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 14:00:30,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:30,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 14:00:30,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:00:30,117 INFO L87 Difference]: Start difference. First operand 66 states and 110 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 14:00:30,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:30,453 INFO L93 Difference]: Finished difference Result 212 states and 331 transitions. [2022-02-16 14:00:30,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 14:00:30,453 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 14:00:30,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:30,454 INFO L225 Difference]: With dead ends: 212 [2022-02-16 14:00:30,454 INFO L226 Difference]: Without dead ends: 182 [2022-02-16 14:00:30,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:00:30,455 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 102 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:30,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 93 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:00:30,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-16 14:00:30,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 99. [2022-02-16 14:00:30,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.8265306122448979) internal successors, (179), 98 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:30,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 179 transitions. [2022-02-16 14:00:30,462 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 179 transitions. Word has length 20 [2022-02-16 14:00:30,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:30,462 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 179 transitions. [2022-02-16 14:00:30,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 14:00:30,462 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 179 transitions. [2022-02-16 14:00:30,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 14:00:30,463 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:30,463 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:30,492 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 14:00:30,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:30,680 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:30,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:30,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1088831954, now seen corresponding path program 1 times [2022-02-16 14:00:30,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:30,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119538511] [2022-02-16 14:00:30,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:30,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:30,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:30,741 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 14:00:30,741 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:30,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119538511] [2022-02-16 14:00:30,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119538511] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:30,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119107262] [2022-02-16 14:00:30,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:30,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:30,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:30,743 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 14:00:30,744 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 14:00:30,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:30,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:00:30,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:00:30,932 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 14:00:30,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:00:31,329 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 14:00:31,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119107262] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:31,330 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:31,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-02-16 14:00:31,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684458358] [2022-02-16 14:00:31,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:31,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 14:00:31,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:31,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 14:00:31,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:00:31,331 INFO L87 Difference]: Start difference. First operand 99 states and 179 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 14:00:31,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:31,795 INFO L93 Difference]: Finished difference Result 196 states and 328 transitions. [2022-02-16 14:00:31,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 14:00:31,797 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 14:00:31,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:31,798 INFO L225 Difference]: With dead ends: 196 [2022-02-16 14:00:31,798 INFO L226 Difference]: Without dead ends: 175 [2022-02-16 14:00:31,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:00:31,799 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 88 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:31,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 87 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:00:31,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-02-16 14:00:31,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 122. [2022-02-16 14:00:31,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.8264462809917354) internal successors, (221), 121 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:31,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 221 transitions. [2022-02-16 14:00:31,813 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 221 transitions. Word has length 20 [2022-02-16 14:00:31,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:31,813 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 221 transitions. [2022-02-16 14:00:31,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 14:00:31,814 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 221 transitions. [2022-02-16 14:00:31,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 14:00:31,814 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:31,814 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:31,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-16 14:00:32,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:32,028 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:32,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:32,028 INFO L85 PathProgramCache]: Analyzing trace with hash -847876210, now seen corresponding path program 2 times [2022-02-16 14:00:32,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:32,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89818233] [2022-02-16 14:00:32,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:32,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:32,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:32,103 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 14:00:32,104 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:32,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89818233] [2022-02-16 14:00:32,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89818233] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:32,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054863076] [2022-02-16 14:00:32,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:00:32,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:32,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:32,106 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 14:00:32,111 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 14:00:32,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:00:32,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:00:32,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:00:32,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:00:32,282 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 14:00:32,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:00:32,602 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 14:00:32,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054863076] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:32,602 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:32,602 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-02-16 14:00:32,603 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793351206] [2022-02-16 14:00:32,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:32,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 14:00:32,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:32,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 14:00:32,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:00:32,604 INFO L87 Difference]: Start difference. First operand 122 states and 221 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 14:00:32,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:32,863 INFO L93 Difference]: Finished difference Result 220 states and 374 transitions. [2022-02-16 14:00:32,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 14:00:32,863 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 14:00:32,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:32,864 INFO L225 Difference]: With dead ends: 220 [2022-02-16 14:00:32,865 INFO L226 Difference]: Without dead ends: 197 [2022-02-16 14:00:32,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2022-02-16 14:00:32,866 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 77 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:32,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 121 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:00:32,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-02-16 14:00:32,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 127. [2022-02-16 14:00:32,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.8015873015873016) internal successors, (227), 126 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:32,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 227 transitions. [2022-02-16 14:00:32,871 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 227 transitions. Word has length 20 [2022-02-16 14:00:32,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:32,871 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 227 transitions. [2022-02-16 14:00:32,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 14:00:32,871 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 227 transitions. [2022-02-16 14:00:32,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-16 14:00:32,872 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:32,872 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:32,896 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 14:00:33,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:33,076 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:33,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:33,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1312961460, now seen corresponding path program 3 times [2022-02-16 14:00:33,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:33,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450572550] [2022-02-16 14:00:33,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:33,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:33,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:33,146 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:33,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450572550] [2022-02-16 14:00:33,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450572550] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:33,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140001363] [2022-02-16 14:00:33,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:00:33,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:33,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:33,148 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 14:00:33,187 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 14:00:33,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:00:33,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:00:33,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 14:00:33,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:00:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:33,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:00:33,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:33,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140001363] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:33,967 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:33,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-02-16 14:00:33,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480721320] [2022-02-16 14:00:33,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:33,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 14:00:33,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:33,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 14:00:33,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-02-16 14:00:33,969 INFO L87 Difference]: Start difference. First operand 127 states and 227 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) 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 14:00:34,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:34,806 INFO L93 Difference]: Finished difference Result 319 states and 528 transitions. [2022-02-16 14:00:34,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-16 14:00:34,807 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) 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 22 [2022-02-16 14:00:34,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:34,808 INFO L225 Difference]: With dead ends: 319 [2022-02-16 14:00:34,808 INFO L226 Difference]: Without dead ends: 290 [2022-02-16 14:00:34,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=313, Invalid=877, Unknown=0, NotChecked=0, Total=1190 [2022-02-16 14:00:34,810 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 140 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:34,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 191 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:00:34,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-16 14:00:34,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 176. [2022-02-16 14:00:34,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.822857142857143) internal successors, (319), 175 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:34,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 319 transitions. [2022-02-16 14:00:34,818 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 319 transitions. Word has length 22 [2022-02-16 14:00:34,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:34,818 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 319 transitions. [2022-02-16 14:00:34,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) 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 14:00:34,819 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 319 transitions. [2022-02-16 14:00:34,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 14:00:34,819 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:34,819 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:34,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-02-16 14:00:35,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:35,032 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:35,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:35,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1546791662, now seen corresponding path program 4 times [2022-02-16 14:00:35,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:35,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328866332] [2022-02-16 14:00:35,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:35,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:35,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:35,124 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:35,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328866332] [2022-02-16 14:00:35,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328866332] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:35,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360269095] [2022-02-16 14:00:35,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:00:35,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:35,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:35,125 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 14:00:35,127 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 14:00:35,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:00:35,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:00:35,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 14:00:35,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:00:35,436 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:35,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:00:36,157 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:36,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360269095] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:36,158 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:36,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-02-16 14:00:36,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226556260] [2022-02-16 14:00:36,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:36,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:00:36,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:36,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:00:36,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:00:36,159 INFO L87 Difference]: Start difference. First operand 176 states and 319 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) 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 14:00:37,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:37,404 INFO L93 Difference]: Finished difference Result 447 states and 759 transitions. [2022-02-16 14:00:37,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-16 14:00:37,404 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) 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 24 [2022-02-16 14:00:37,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:37,406 INFO L225 Difference]: With dead ends: 447 [2022-02-16 14:00:37,406 INFO L226 Difference]: Without dead ends: 405 [2022-02-16 14:00:37,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=503, Invalid=1567, Unknown=0, NotChecked=0, Total=2070 [2022-02-16 14:00:37,408 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 162 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:37,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 181 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:00:37,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-02-16 14:00:37,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 237. [2022-02-16 14:00:37,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.88135593220339) internal successors, (444), 236 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:37,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 444 transitions. [2022-02-16 14:00:37,419 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 444 transitions. Word has length 24 [2022-02-16 14:00:37,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:37,419 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 444 transitions. [2022-02-16 14:00:37,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) 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 14:00:37,419 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 444 transitions. [2022-02-16 14:00:37,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 14:00:37,421 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:37,421 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:37,448 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 14:00:37,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:37,640 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:37,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:37,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1752730094, now seen corresponding path program 5 times [2022-02-16 14:00:37,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:37,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854818932] [2022-02-16 14:00:37,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:37,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:37,767 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:37,767 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:37,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854818932] [2022-02-16 14:00:37,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854818932] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:37,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79370933] [2022-02-16 14:00:37,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:00:37,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:37,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:37,769 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 14:00:37,769 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 14:00:37,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-16 14:00:37,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:00:37,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 14:00:37,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:00:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:38,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:00:38,837 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:38,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79370933] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:38,837 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:38,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-02-16 14:00:38,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784468384] [2022-02-16 14:00:38,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:38,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:00:38,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:38,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:00:38,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:00:38,839 INFO L87 Difference]: Start difference. First operand 237 states and 444 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) 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 14:00:39,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:39,930 INFO L93 Difference]: Finished difference Result 486 states and 848 transitions. [2022-02-16 14:00:39,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-16 14:00:39,930 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) 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 24 [2022-02-16 14:00:39,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:39,932 INFO L225 Difference]: With dead ends: 486 [2022-02-16 14:00:39,932 INFO L226 Difference]: Without dead ends: 439 [2022-02-16 14:00:39,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=483, Invalid=1409, Unknown=0, NotChecked=0, Total=1892 [2022-02-16 14:00:39,934 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 168 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:39,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 127 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:00:39,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-02-16 14:00:39,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 283. [2022-02-16 14:00:39,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 1.8617021276595744) internal successors, (525), 282 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:39,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 525 transitions. [2022-02-16 14:00:39,942 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 525 transitions. Word has length 24 [2022-02-16 14:00:39,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:39,942 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 525 transitions. [2022-02-16 14:00:39,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) 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 14:00:39,943 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 525 transitions. [2022-02-16 14:00:39,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 14:00:39,943 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:39,943 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:39,969 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 14:00:40,166 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,SelfDestructingSolverStorable10 [2022-02-16 14:00:40,167 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:40,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:40,167 INFO L85 PathProgramCache]: Analyzing trace with hash 976202070, now seen corresponding path program 6 times [2022-02-16 14:00:40,167 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:40,167 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74263455] [2022-02-16 14:00:40,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:40,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:40,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:40,249 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:40,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:40,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74263455] [2022-02-16 14:00:40,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74263455] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:40,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103181827] [2022-02-16 14:00:40,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:00:40,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:40,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:40,251 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 14:00:40,252 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 14:00:40,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:00:40,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:00:40,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 14:00:40,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:00:40,544 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:40,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:00:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:41,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103181827] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:41,206 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:41,206 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-02-16 14:00:41,206 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21994506] [2022-02-16 14:00:41,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:41,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:00:41,206 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:41,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:00:41,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:00:41,207 INFO L87 Difference]: Start difference. First operand 283 states and 525 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) 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 14:00:42,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:42,364 INFO L93 Difference]: Finished difference Result 526 states and 929 transitions. [2022-02-16 14:00:42,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-16 14:00:42,365 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) 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 24 [2022-02-16 14:00:42,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:42,366 INFO L225 Difference]: With dead ends: 526 [2022-02-16 14:00:42,366 INFO L226 Difference]: Without dead ends: 486 [2022-02-16 14:00:42,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=595, Invalid=1757, Unknown=0, NotChecked=0, Total=2352 [2022-02-16 14:00:42,368 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 172 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:42,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 135 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:00:42,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-02-16 14:00:42,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 355. [2022-02-16 14:00:42,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.8418079096045197) internal successors, (652), 354 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:42,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 652 transitions. [2022-02-16 14:00:42,377 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 652 transitions. Word has length 24 [2022-02-16 14:00:42,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:42,377 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 652 transitions. [2022-02-16 14:00:42,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) 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 14:00:42,377 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 652 transitions. [2022-02-16 14:00:42,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 14:00:42,378 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:42,378 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:42,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-02-16 14:00:42,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:42,591 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:42,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:42,592 INFO L85 PathProgramCache]: Analyzing trace with hash -2091067630, now seen corresponding path program 7 times [2022-02-16 14:00:42,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:42,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785977450] [2022-02-16 14:00:42,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:42,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:42,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:42,666 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:42,666 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:42,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785977450] [2022-02-16 14:00:42,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785977450] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:42,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80887453] [2022-02-16 14:00:42,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:00:42,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:42,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:42,667 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 14:00:42,668 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 14:00:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:42,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 14:00:42,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:00:42,904 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:42,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:00:43,528 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:43,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80887453] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:43,529 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:43,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-02-16 14:00:43,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908412118] [2022-02-16 14:00:43,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:43,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:00:43,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:43,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:00:43,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:00:43,530 INFO L87 Difference]: Start difference. First operand 355 states and 652 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) 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 14:00:44,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:44,381 INFO L93 Difference]: Finished difference Result 627 states and 1100 transitions. [2022-02-16 14:00:44,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-16 14:00:44,381 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) 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 24 [2022-02-16 14:00:44,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:44,384 INFO L225 Difference]: With dead ends: 627 [2022-02-16 14:00:44,384 INFO L226 Difference]: Without dead ends: 588 [2022-02-16 14:00:44,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=465, Invalid=1341, Unknown=0, NotChecked=0, Total=1806 [2022-02-16 14:00:44,385 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 167 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:44,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 129 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:00:44,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-02-16 14:00:44,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 413. [2022-02-16 14:00:44,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 1.8276699029126213) internal successors, (753), 412 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:44,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 753 transitions. [2022-02-16 14:00:44,396 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 753 transitions. Word has length 24 [2022-02-16 14:00:44,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:44,396 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 753 transitions. [2022-02-16 14:00:44,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) 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 14:00:44,396 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 753 transitions. [2022-02-16 14:00:44,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 14:00:44,397 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:44,397 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:44,419 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 14:00:44,611 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,SelfDestructingSolverStorable12 [2022-02-16 14:00:44,612 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:44,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:44,612 INFO L85 PathProgramCache]: Analyzing trace with hash -2093311726, now seen corresponding path program 8 times [2022-02-16 14:00:44,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:44,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902269484] [2022-02-16 14:00:44,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:44,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:44,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:44,695 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:44,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902269484] [2022-02-16 14:00:44,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902269484] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:44,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853766958] [2022-02-16 14:00:44,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:00:44,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:44,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:44,697 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 14:00:44,712 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 14:00:44,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:00:44,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:00:44,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 14:00:44,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:00:44,973 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:44,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:00:45,693 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:45,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853766958] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:45,693 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:45,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-02-16 14:00:45,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903311127] [2022-02-16 14:00:45,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:45,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:00:45,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:45,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:00:45,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:00:45,694 INFO L87 Difference]: Start difference. First operand 413 states and 753 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) 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 14:00:47,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:47,194 INFO L93 Difference]: Finished difference Result 733 states and 1286 transitions. [2022-02-16 14:00:47,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-16 14:00:47,194 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) 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 24 [2022-02-16 14:00:47,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:47,196 INFO L225 Difference]: With dead ends: 733 [2022-02-16 14:00:47,197 INFO L226 Difference]: Without dead ends: 700 [2022-02-16 14:00:47,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=645, Invalid=1905, Unknown=0, NotChecked=0, Total=2550 [2022-02-16 14:00:47,198 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 171 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:47,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 263 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:00:47,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-02-16 14:00:47,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 479. [2022-02-16 14:00:47,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 1.8723849372384938) internal successors, (895), 478 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:47,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 895 transitions. [2022-02-16 14:00:47,210 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 895 transitions. Word has length 24 [2022-02-16 14:00:47,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:47,210 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 895 transitions. [2022-02-16 14:00:47,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) 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 14:00:47,210 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 895 transitions. [2022-02-16 14:00:47,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 14:00:47,211 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:47,211 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:47,233 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 14:00:47,431 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,SelfDestructingSolverStorable13 [2022-02-16 14:00:47,431 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:47,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:47,432 INFO L85 PathProgramCache]: Analyzing trace with hash 745949134, now seen corresponding path program 9 times [2022-02-16 14:00:47,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:47,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017626548] [2022-02-16 14:00:47,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:47,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:47,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:47,513 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:47,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017626548] [2022-02-16 14:00:47,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017626548] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:47,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476469727] [2022-02-16 14:00:47,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:00:47,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:47,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:47,515 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 14:00:47,515 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 14:00:47,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:00:47,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:00:47,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 14:00:47,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:00:47,826 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:47,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:00:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:48,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476469727] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:48,599 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:48,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-02-16 14:00:48,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364536712] [2022-02-16 14:00:48,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:48,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:00:48,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:48,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:00:48,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:00:48,600 INFO L87 Difference]: Start difference. First operand 479 states and 895 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) 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 14:00:49,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:49,963 INFO L93 Difference]: Finished difference Result 775 states and 1383 transitions. [2022-02-16 14:00:49,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-16 14:00:49,963 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) 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 24 [2022-02-16 14:00:49,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:49,965 INFO L225 Difference]: With dead ends: 775 [2022-02-16 14:00:49,966 INFO L226 Difference]: Without dead ends: 736 [2022-02-16 14:00:49,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=575, Invalid=1777, Unknown=0, NotChecked=0, Total=2352 [2022-02-16 14:00:49,967 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 177 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:49,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 239 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:00:49,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-02-16 14:00:49,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 574. [2022-02-16 14:00:49,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 1.8917975567190226) internal successors, (1084), 573 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:49,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1084 transitions. [2022-02-16 14:00:49,981 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1084 transitions. Word has length 24 [2022-02-16 14:00:49,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:49,981 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 1084 transitions. [2022-02-16 14:00:49,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) 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 14:00:49,981 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1084 transitions. [2022-02-16 14:00:49,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 14:00:49,982 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:49,982 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:50,007 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 14:00:50,195 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,SelfDestructingSolverStorable14 [2022-02-16 14:00:50,195 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:50,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:50,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1190759030, now seen corresponding path program 10 times [2022-02-16 14:00:50,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:50,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902047221] [2022-02-16 14:00:50,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:50,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:50,280 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:50,281 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:50,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902047221] [2022-02-16 14:00:50,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902047221] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:50,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661614447] [2022-02-16 14:00:50,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:00:50,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:50,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:50,282 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 14:00:50,283 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 14:00:50,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:00:50,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:00:50,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 14:00:50,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:00:50,522 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:50,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:00:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:51,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661614447] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:51,245 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:51,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-02-16 14:00:51,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988356912] [2022-02-16 14:00:51,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:51,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:00:51,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:51,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:00:51,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:00:51,247 INFO L87 Difference]: Start difference. First operand 574 states and 1084 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) 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 14:00:52,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:52,071 INFO L93 Difference]: Finished difference Result 712 states and 1316 transitions. [2022-02-16 14:00:52,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-16 14:00:52,072 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) 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 24 [2022-02-16 14:00:52,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:52,074 INFO L225 Difference]: With dead ends: 712 [2022-02-16 14:00:52,074 INFO L226 Difference]: Without dead ends: 691 [2022-02-16 14:00:52,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=434, Invalid=1288, Unknown=0, NotChecked=0, Total=1722 [2022-02-16 14:00:52,075 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 104 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:52,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 139 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:00:52,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-02-16 14:00:52,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 582. [2022-02-16 14:00:52,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 1.8795180722891567) internal successors, (1092), 581 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:52,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1092 transitions. [2022-02-16 14:00:52,096 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1092 transitions. Word has length 24 [2022-02-16 14:00:52,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:52,096 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 1092 transitions. [2022-02-16 14:00:52,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) 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 14:00:52,096 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1092 transitions. [2022-02-16 14:00:52,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:00:52,099 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:52,099 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:52,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-02-16 14:00:52,321 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,SelfDestructingSolverStorable15 [2022-02-16 14:00:52,321 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:52,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:52,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1308626010, now seen corresponding path program 3 times [2022-02-16 14:00:52,322 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:52,322 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472597883] [2022-02-16 14:00:52,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:52,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:52,536 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:52,536 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:52,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472597883] [2022-02-16 14:00:52,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472597883] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:52,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897364668] [2022-02-16 14:00:52,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:00:52,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:52,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:52,538 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 14:00:52,573 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 14:00:52,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-02-16 14:00:52,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:00:52,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-16 14:00:52,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:00:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:52,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:00:53,705 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:53,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897364668] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:53,705 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:53,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-02-16 14:00:53,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687769239] [2022-02-16 14:00:53,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:53,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:00:53,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:53,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:00:53,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:00:53,707 INFO L87 Difference]: Start difference. First operand 582 states and 1092 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:00:54,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:54,864 INFO L93 Difference]: Finished difference Result 915 states and 1617 transitions. [2022-02-16 14:00:54,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-16 14:00:54,865 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 28 [2022-02-16 14:00:54,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:54,868 INFO L225 Difference]: With dead ends: 915 [2022-02-16 14:00:54,868 INFO L226 Difference]: Without dead ends: 854 [2022-02-16 14:00:54,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=760, Invalid=2210, Unknown=0, NotChecked=0, Total=2970 [2022-02-16 14:00:54,870 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 223 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:54,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 189 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:00:54,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2022-02-16 14:00:54,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 647. [2022-02-16 14:00:54,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 1.8993808049535603) internal successors, (1227), 646 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:54,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1227 transitions. [2022-02-16 14:00:54,883 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1227 transitions. Word has length 28 [2022-02-16 14:00:54,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:54,884 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 1227 transitions. [2022-02-16 14:00:54,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:00:54,884 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1227 transitions. [2022-02-16 14:00:54,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:00:54,885 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:54,885 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:54,911 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 14:00:55,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:55,099 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:55,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:55,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1067881254, now seen corresponding path program 11 times [2022-02-16 14:00:55,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:55,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423481506] [2022-02-16 14:00:55,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:55,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:55,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:55,221 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:55,222 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:55,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423481506] [2022-02-16 14:00:55,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423481506] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:55,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64609099] [2022-02-16 14:00:55,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:00:55,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:55,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:55,223 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 14:00:55,231 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 14:00:55,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-02-16 14:00:55,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:00:55,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:00:55,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:00:55,687 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:55,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:00:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:56,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64609099] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:56,915 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:56,915 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-02-16 14:00:56,915 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592423367] [2022-02-16 14:00:56,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:56,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:00:56,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:56,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:00:56,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:00:56,916 INFO L87 Difference]: Start difference. First operand 647 states and 1227 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:00:59,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:59,425 INFO L93 Difference]: Finished difference Result 1004 states and 1789 transitions. [2022-02-16 14:00:59,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-16 14:00:59,425 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 28 [2022-02-16 14:00:59,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:59,429 INFO L225 Difference]: With dead ends: 1004 [2022-02-16 14:00:59,429 INFO L226 Difference]: Without dead ends: 978 [2022-02-16 14:00:59,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=978, Invalid=2804, Unknown=0, NotChecked=0, Total=3782 [2022-02-16 14:00:59,430 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 196 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:59,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 487 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:00:59,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-02-16 14:00:59,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 719. [2022-02-16 14:00:59,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 1.9220055710306407) internal successors, (1380), 718 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:59,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1380 transitions. [2022-02-16 14:00:59,445 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1380 transitions. Word has length 28 [2022-02-16 14:00:59,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:59,445 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 1380 transitions. [2022-02-16 14:00:59,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:00:59,445 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1380 transitions. [2022-02-16 14:00:59,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:00:59,447 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:59,447 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:59,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-16 14:00:59,659 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,SelfDestructingSolverStorable17 [2022-02-16 14:00:59,659 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:59,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:59,660 INFO L85 PathProgramCache]: Analyzing trace with hash -325346154, now seen corresponding path program 12 times [2022-02-16 14:00:59,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:59,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843413626] [2022-02-16 14:00:59,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:59,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:59,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:59,771 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:59,771 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:59,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843413626] [2022-02-16 14:00:59,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843413626] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:59,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460401761] [2022-02-16 14:00:59,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:00:59,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:59,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:59,773 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 14:00:59,774 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 14:00:59,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 14:00:59,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:00:59,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:00:59,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:01:00,180 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:00,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:01:01,738 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:01,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460401761] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:01:01,739 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:01:01,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-02-16 14:01:01,739 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772905446] [2022-02-16 14:01:01,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:01:01,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:01:01,739 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:01:01,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:01:01,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=514, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:01:01,740 INFO L87 Difference]: Start difference. First operand 719 states and 1380 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:01:04,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:01:04,547 INFO L93 Difference]: Finished difference Result 1267 states and 2277 transitions. [2022-02-16 14:01:04,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-16 14:01:04,547 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 28 [2022-02-16 14:01:04,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:01:04,551 INFO L225 Difference]: With dead ends: 1267 [2022-02-16 14:01:04,551 INFO L226 Difference]: Without dead ends: 1205 [2022-02-16 14:01:04,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1720 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1239, Invalid=3873, Unknown=0, NotChecked=0, Total=5112 [2022-02-16 14:01:04,552 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 258 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:01:04,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 381 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:01:04,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2022-02-16 14:01:04,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 810. [2022-02-16 14:01:04,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 1.9245982694684796) internal successors, (1557), 809 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:04,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1557 transitions. [2022-02-16 14:01:04,569 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1557 transitions. Word has length 28 [2022-02-16 14:01:04,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:01:04,569 INFO L470 AbstractCegarLoop]: Abstraction has 810 states and 1557 transitions. [2022-02-16 14:01:04,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:01:04,569 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1557 transitions. [2022-02-16 14:01:04,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:01:04,571 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:01:04,571 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:01:04,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-02-16 14:01:04,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:04,788 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:01:04,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:01:04,788 INFO L85 PathProgramCache]: Analyzing trace with hash 933792210, now seen corresponding path program 13 times [2022-02-16 14:01:04,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:01:04,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830590606] [2022-02-16 14:01:04,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:01:04,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:01:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:01:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:04,933 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:01:04,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830590606] [2022-02-16 14:01:04,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830590606] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:01:04,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988595908] [2022-02-16 14:01:04,933 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:01:04,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:04,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:01:04,935 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 14:01:04,938 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 14:01:04,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:01:04,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:01:04,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:01:05,386 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:05,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:01:06,792 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:06,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988595908] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:01:06,792 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:01:06,792 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-02-16 14:01:06,792 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23854290] [2022-02-16 14:01:06,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:01:06,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:01:06,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:01:06,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:01:06,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:01:06,794 INFO L87 Difference]: Start difference. First operand 810 states and 1557 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:01:10,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:01:10,340 INFO L93 Difference]: Finished difference Result 1324 states and 2404 transitions. [2022-02-16 14:01:10,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-16 14:01:10,340 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 28 [2022-02-16 14:01:10,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:01:10,343 INFO L225 Difference]: With dead ends: 1324 [2022-02-16 14:01:10,343 INFO L226 Difference]: Without dead ends: 1285 [2022-02-16 14:01:10,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1497 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1071, Invalid=3621, Unknown=0, NotChecked=0, Total=4692 [2022-02-16 14:01:10,345 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 308 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:01:10,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 409 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:01:10,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2022-02-16 14:01:10,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 950. [2022-02-16 14:01:10,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 949 states have (on average 1.9293993677555321) internal successors, (1831), 949 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:10,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1831 transitions. [2022-02-16 14:01:10,364 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1831 transitions. Word has length 28 [2022-02-16 14:01:10,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:01:10,364 INFO L470 AbstractCegarLoop]: Abstraction has 950 states and 1831 transitions. [2022-02-16 14:01:10,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:01:10,364 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1831 transitions. [2022-02-16 14:01:10,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:01:10,366 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:01:10,366 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:01:10,386 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 14:01:10,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:10,575 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:01:10,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:01:10,576 INFO L85 PathProgramCache]: Analyzing trace with hash 949796246, now seen corresponding path program 14 times [2022-02-16 14:01:10,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:01:10,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668690310] [2022-02-16 14:01:10,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:01:10,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:01:10,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:01:10,684 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:10,684 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:01:10,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668690310] [2022-02-16 14:01:10,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668690310] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:01:10,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445303004] [2022-02-16 14:01:10,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:01:10,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:10,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:01:10,685 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 14:01:10,715 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 14:01:10,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:01:10,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:01:10,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:01:10,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:01:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:11,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:01:12,665 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:12,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445303004] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:01:12,665 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:01:12,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-02-16 14:01:12,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316615404] [2022-02-16 14:01:12,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:01:12,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:01:12,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:01:12,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:01:12,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:01:12,666 INFO L87 Difference]: Start difference. First operand 950 states and 1831 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:01:17,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:01:17,059 INFO L93 Difference]: Finished difference Result 1557 states and 2850 transitions. [2022-02-16 14:01:17,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-16 14:01:17,060 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 28 [2022-02-16 14:01:17,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:01:17,064 INFO L225 Difference]: With dead ends: 1557 [2022-02-16 14:01:17,064 INFO L226 Difference]: Without dead ends: 1489 [2022-02-16 14:01:17,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2328 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1614, Invalid=4866, Unknown=0, NotChecked=0, Total=6480 [2022-02-16 14:01:17,066 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 405 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:01:17,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 263 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:01:17,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2022-02-16 14:01:17,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1014. [2022-02-16 14:01:17,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1014 states, 1013 states have (on average 1.9427443237907207) internal successors, (1968), 1013 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:17,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 1968 transitions. [2022-02-16 14:01:17,085 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 1968 transitions. Word has length 28 [2022-02-16 14:01:17,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:01:17,086 INFO L470 AbstractCegarLoop]: Abstraction has 1014 states and 1968 transitions. [2022-02-16 14:01:17,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:01:17,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 1968 transitions. [2022-02-16 14:01:17,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:01:17,088 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:01:17,088 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:01:17,115 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 14:01:17,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:17,309 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:01:17,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:01:17,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1870597074, now seen corresponding path program 15 times [2022-02-16 14:01:17,310 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:01:17,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545779985] [2022-02-16 14:01:17,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:01:17,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:01:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:01:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:17,438 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:01:17,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545779985] [2022-02-16 14:01:17,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545779985] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:01:17,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016732424] [2022-02-16 14:01:17,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:01:17,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:17,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:01:17,439 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 14:01:17,443 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 14:01:17,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-02-16 14:01:17,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:01:17,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:01:17,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:01:17,952 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:17,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:01:19,383 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:19,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016732424] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:01:19,384 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:01:19,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-02-16 14:01:19,384 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462110018] [2022-02-16 14:01:19,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:01:19,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:01:19,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:01:19,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:01:19,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:01:19,385 INFO L87 Difference]: Start difference. First operand 1014 states and 1968 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:01:23,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:01:23,259 INFO L93 Difference]: Finished difference Result 1595 states and 2967 transitions. [2022-02-16 14:01:23,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-16 14:01:23,259 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 28 [2022-02-16 14:01:23,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:01:23,263 INFO L225 Difference]: With dead ends: 1595 [2022-02-16 14:01:23,263 INFO L226 Difference]: Without dead ends: 1562 [2022-02-16 14:01:23,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1928 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1370, Invalid=4330, Unknown=0, NotChecked=0, Total=5700 [2022-02-16 14:01:23,265 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 346 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:01:23,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 479 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:01:23,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2022-02-16 14:01:23,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 1174. [2022-02-16 14:01:23,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 1.9556692242114238) internal successors, (2294), 1173 states have internal predecessors, (2294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:23,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 2294 transitions. [2022-02-16 14:01:23,284 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 2294 transitions. Word has length 28 [2022-02-16 14:01:23,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:01:23,285 INFO L470 AbstractCegarLoop]: Abstraction has 1174 states and 2294 transitions. [2022-02-16 14:01:23,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:01:23,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 2294 transitions. [2022-02-16 14:01:23,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:01:23,287 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:01:23,287 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:01:23,313 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 14:01:23,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:23,502 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:01:23,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:01:23,502 INFO L85 PathProgramCache]: Analyzing trace with hash 2058287374, now seen corresponding path program 16 times [2022-02-16 14:01:23,502 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:01:23,502 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576718774] [2022-02-16 14:01:23,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:01:23,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:01:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:01:23,632 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:23,632 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:01:23,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576718774] [2022-02-16 14:01:23,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576718774] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:01:23,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556559257] [2022-02-16 14:01:23,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:01:23,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:23,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:01:23,634 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 14:01:23,634 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 14:01:23,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:01:23,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:01:23,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:01:23,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:01:24,158 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:24,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:01:25,820 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:25,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556559257] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:01:25,821 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:01:25,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-02-16 14:01:25,821 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150766309] [2022-02-16 14:01:25,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:01:25,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:01:25,821 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:01:25,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:01:25,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:01:25,822 INFO L87 Difference]: Start difference. First operand 1174 states and 2294 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:01:29,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:01:29,019 INFO L93 Difference]: Finished difference Result 1705 states and 3159 transitions. [2022-02-16 14:01:29,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-16 14:01:29,019 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 28 [2022-02-16 14:01:29,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:01:29,024 INFO L225 Difference]: With dead ends: 1705 [2022-02-16 14:01:29,024 INFO L226 Difference]: Without dead ends: 1661 [2022-02-16 14:01:29,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=933, Invalid=3227, Unknown=0, NotChecked=0, Total=4160 [2022-02-16 14:01:29,025 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 262 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:01:29,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 557 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:01:29,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2022-02-16 14:01:29,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1368. [2022-02-16 14:01:29,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1367 states have (on average 1.9451353328456473) internal successors, (2659), 1367 states have internal predecessors, (2659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:29,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2659 transitions. [2022-02-16 14:01:29,048 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2659 transitions. Word has length 28 [2022-02-16 14:01:29,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:01:29,049 INFO L470 AbstractCegarLoop]: Abstraction has 1368 states and 2659 transitions. [2022-02-16 14:01:29,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:01:29,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2659 transitions. [2022-02-16 14:01:29,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:01:29,052 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:01:29,053 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:01:29,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-02-16 14:01:29,262 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,SelfDestructingSolverStorable22 [2022-02-16 14:01:29,263 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:01:29,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:01:29,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1999004010, now seen corresponding path program 17 times [2022-02-16 14:01:29,263 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:01:29,263 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645707526] [2022-02-16 14:01:29,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:01:29,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:01:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:01:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:29,407 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:01:29,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645707526] [2022-02-16 14:01:29,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645707526] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:01:29,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598804792] [2022-02-16 14:01:29,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:01:29,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:29,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:01:29,410 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 14:01:29,412 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 14:01:29,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-16 14:01:29,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:01:29,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 14:01:29,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:01:29,798 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:29,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:01:31,347 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:31,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598804792] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:01:31,348 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:01:31,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-02-16 14:01:31,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514961277] [2022-02-16 14:01:31,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:01:31,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:01:31,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:01:31,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:01:31,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:01:31,349 INFO L87 Difference]: Start difference. First operand 1368 states and 2659 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:01:33,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:01:33,904 INFO L93 Difference]: Finished difference Result 2071 states and 3922 transitions. [2022-02-16 14:01:33,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-16 14:01:33,905 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 28 [2022-02-16 14:01:33,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:01:33,910 INFO L225 Difference]: With dead ends: 2071 [2022-02-16 14:01:33,910 INFO L226 Difference]: Without dead ends: 2021 [2022-02-16 14:01:33,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=881, Invalid=2659, Unknown=0, NotChecked=0, Total=3540 [2022-02-16 14:01:33,912 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 290 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:01:33,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 171 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:01:33,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2022-02-16 14:01:33,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1481. [2022-02-16 14:01:33,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1480 states have (on average 1.9398648648648649) internal successors, (2871), 1480 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:33,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 2871 transitions. [2022-02-16 14:01:33,940 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 2871 transitions. Word has length 28 [2022-02-16 14:01:33,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:01:33,940 INFO L470 AbstractCegarLoop]: Abstraction has 1481 states and 2871 transitions. [2022-02-16 14:01:33,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:01:33,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 2871 transitions. [2022-02-16 14:01:33,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:01:33,943 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:01:33,943 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:01:33,966 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 14:01:34,166 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,SelfDestructingSolverStorable23 [2022-02-16 14:01:34,167 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:01:34,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:01:34,167 INFO L85 PathProgramCache]: Analyzing trace with hash -908761014, now seen corresponding path program 18 times [2022-02-16 14:01:34,167 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:01:34,167 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959063535] [2022-02-16 14:01:34,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:01:34,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:01:34,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:01:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:34,300 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:01:34,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959063535] [2022-02-16 14:01:34,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959063535] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:01:34,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279288527] [2022-02-16 14:01:34,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:01:34,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:34,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:01:34,301 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 14:01:34,302 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 14:01:34,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 14:01:34,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:01:34,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:01:34,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:01:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:34,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:01:36,429 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:36,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279288527] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:01:36,430 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:01:36,430 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-02-16 14:01:36,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108576462] [2022-02-16 14:01:36,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:01:36,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:01:36,430 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:01:36,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:01:36,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:01:36,431 INFO L87 Difference]: Start difference. First operand 1481 states and 2871 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:01:39,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:01:39,239 INFO L93 Difference]: Finished difference Result 2132 states and 3994 transitions. [2022-02-16 14:01:39,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-16 14:01:39,239 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 28 [2022-02-16 14:01:39,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:01:39,245 INFO L225 Difference]: With dead ends: 2132 [2022-02-16 14:01:39,245 INFO L226 Difference]: Without dead ends: 2076 [2022-02-16 14:01:39,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=959, Invalid=2947, Unknown=0, NotChecked=0, Total=3906 [2022-02-16 14:01:39,247 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 263 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:01:39,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 425 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:01:39,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2022-02-16 14:01:39,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 1691. [2022-02-16 14:01:39,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1690 states have (on average 1.9183431952662722) internal successors, (3242), 1690 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:39,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 3242 transitions. [2022-02-16 14:01:39,271 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 3242 transitions. Word has length 28 [2022-02-16 14:01:39,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:01:39,271 INFO L470 AbstractCegarLoop]: Abstraction has 1691 states and 3242 transitions. [2022-02-16 14:01:39,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:01:39,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 3242 transitions. [2022-02-16 14:01:39,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:01:39,274 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:01:39,274 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:01:39,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-16 14:01:39,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:39,484 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:01:39,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:01:39,485 INFO L85 PathProgramCache]: Analyzing trace with hash 2115399250, now seen corresponding path program 19 times [2022-02-16 14:01:39,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:01:39,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921234421] [2022-02-16 14:01:39,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:01:39,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:01:39,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:01:39,627 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:39,628 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:01:39,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921234421] [2022-02-16 14:01:39,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921234421] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:01:39,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130505637] [2022-02-16 14:01:39,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:01:39,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:39,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:01:39,629 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 14:01:39,631 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 14:01:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:01:39,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:01:39,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:01:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:40,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:01:41,842 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:41,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130505637] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:01:41,842 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:01:41,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-02-16 14:01:41,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632033574] [2022-02-16 14:01:41,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:01:41,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:01:41,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:01:41,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:01:41,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:01:41,843 INFO L87 Difference]: Start difference. First operand 1691 states and 3242 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:01:44,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:01:44,420 INFO L93 Difference]: Finished difference Result 2197 states and 4071 transitions. [2022-02-16 14:01:44,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-16 14:01:44,421 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 28 [2022-02-16 14:01:44,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:01:44,427 INFO L225 Difference]: With dead ends: 2197 [2022-02-16 14:01:44,427 INFO L226 Difference]: Without dead ends: 2144 [2022-02-16 14:01:44,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=849, Invalid=2691, Unknown=0, NotChecked=0, Total=3540 [2022-02-16 14:01:44,428 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 273 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:01:44,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 251 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:01:44,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2022-02-16 14:01:44,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 1858. [2022-02-16 14:01:44,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1857 states have (on average 1.918147549811524) internal successors, (3562), 1857 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:44,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 3562 transitions. [2022-02-16 14:01:44,452 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 3562 transitions. Word has length 28 [2022-02-16 14:01:44,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:01:44,452 INFO L470 AbstractCegarLoop]: Abstraction has 1858 states and 3562 transitions. [2022-02-16 14:01:44,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:01:44,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 3562 transitions. [2022-02-16 14:01:44,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:01:44,455 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:01:44,455 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:01:44,473 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 14:01:44,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:44,660 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:01:44,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:01:44,660 INFO L85 PathProgramCache]: Analyzing trace with hash 178691086, now seen corresponding path program 20 times [2022-02-16 14:01:44,661 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:01:44,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238961142] [2022-02-16 14:01:44,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:01:44,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:01:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:01:44,778 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:44,779 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:01:44,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238961142] [2022-02-16 14:01:44,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238961142] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:01:44,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701766750] [2022-02-16 14:01:44,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:01:44,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:44,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:01:44,780 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 14:01:44,807 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 14:01:44,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:01:44,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:01:44,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:01:44,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:01:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:45,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:01:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:46,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701766750] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:01:46,747 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:01:46,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-02-16 14:01:46,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985253290] [2022-02-16 14:01:46,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:01:46,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:01:46,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:01:46,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:01:46,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=525, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:01:46,748 INFO L87 Difference]: Start difference. First operand 1858 states and 3562 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:01:50,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:01:50,018 INFO L93 Difference]: Finished difference Result 2384 states and 4459 transitions. [2022-02-16 14:01:50,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-16 14:01:50,019 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 28 [2022-02-16 14:01:50,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:01:50,036 INFO L225 Difference]: With dead ends: 2384 [2022-02-16 14:01:50,036 INFO L226 Difference]: Without dead ends: 2346 [2022-02-16 14:01:50,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1000, Invalid=3422, Unknown=0, NotChecked=0, Total=4422 [2022-02-16 14:01:50,037 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 243 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:01:50,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 459 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:01:50,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2022-02-16 14:01:50,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1986. [2022-02-16 14:01:50,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1986 states, 1985 states have (on average 1.9204030226700253) internal successors, (3812), 1985 states have internal predecessors, (3812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:50,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1986 states to 1986 states and 3812 transitions. [2022-02-16 14:01:50,076 INFO L78 Accepts]: Start accepts. Automaton has 1986 states and 3812 transitions. Word has length 28 [2022-02-16 14:01:50,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:01:50,076 INFO L470 AbstractCegarLoop]: Abstraction has 1986 states and 3812 transitions. [2022-02-16 14:01:50,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:01:50,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1986 states and 3812 transitions. [2022-02-16 14:01:50,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:01:50,079 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:01:50,079 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:01:50,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-16 14:01:50,299 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,SelfDestructingSolverStorable26 [2022-02-16 14:01:50,299 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:01:50,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:01:50,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1714188122, now seen corresponding path program 21 times [2022-02-16 14:01:50,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:01:50,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760108851] [2022-02-16 14:01:50,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:01:50,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:01:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:01:50,401 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:50,401 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:01:50,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760108851] [2022-02-16 14:01:50,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760108851] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:01:50,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132642217] [2022-02-16 14:01:50,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:01:50,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:50,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:01:50,403 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 14:01:50,430 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 14:01:50,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-02-16 14:01:50,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:01:50,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:01:50,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:01:50,785 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:50,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:01:51,552 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:51,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132642217] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:01:51,553 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:01:51,553 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-02-16 14:01:51,553 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993529787] [2022-02-16 14:01:51,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:01:51,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:01:51,553 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:01:51,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:01:51,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:01:51,554 INFO L87 Difference]: Start difference. First operand 1986 states and 3812 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:01:53,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:01:53,036 INFO L93 Difference]: Finished difference Result 2295 states and 4291 transitions. [2022-02-16 14:01:53,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-16 14:01:53,037 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 28 [2022-02-16 14:01:53,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:01:53,041 INFO L225 Difference]: With dead ends: 2295 [2022-02-16 14:01:53,041 INFO L226 Difference]: Without dead ends: 2224 [2022-02-16 14:01:53,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=862, Invalid=2444, Unknown=0, NotChecked=0, Total=3306 [2022-02-16 14:01:53,042 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 197 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:01:53,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 431 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:01:53,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2022-02-16 14:01:53,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 2081. [2022-02-16 14:01:53,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 2080 states have (on average 1.9086538461538463) internal successors, (3970), 2080 states have internal predecessors, (3970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:53,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 3970 transitions. [2022-02-16 14:01:53,067 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 3970 transitions. Word has length 28 [2022-02-16 14:01:53,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:01:53,067 INFO L470 AbstractCegarLoop]: Abstraction has 2081 states and 3970 transitions. [2022-02-16 14:01:53,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:01:53,067 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 3970 transitions. [2022-02-16 14:01:53,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:01:53,072 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:01:53,072 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:01:53,089 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 14:01:53,273 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,SelfDestructingSolverStorable27 [2022-02-16 14:01:53,273 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:01:53,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:01:53,273 INFO L85 PathProgramCache]: Analyzing trace with hash 159751830, now seen corresponding path program 22 times [2022-02-16 14:01:53,273 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:01:53,273 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496063436] [2022-02-16 14:01:53,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:01:53,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:01:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:01:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:53,374 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:01:53,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496063436] [2022-02-16 14:01:53,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496063436] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:01:53,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50937658] [2022-02-16 14:01:53,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:01:53,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:53,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:01:53,376 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 14:01:53,376 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 14:01:53,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:01:53,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:01:53,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:01:53,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:01:53,734 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:53,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:01:54,573 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:54,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50937658] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:01:54,574 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:01:54,574 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-02-16 14:01:54,574 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840594154] [2022-02-16 14:01:54,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:01:54,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:01:54,574 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:01:54,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:01:54,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:01:54,575 INFO L87 Difference]: Start difference. First operand 2081 states and 3970 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:01:55,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:01:55,882 INFO L93 Difference]: Finished difference Result 2426 states and 4538 transitions. [2022-02-16 14:01:55,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-16 14:01:55,882 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 28 [2022-02-16 14:01:55,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:01:55,887 INFO L225 Difference]: With dead ends: 2426 [2022-02-16 14:01:55,887 INFO L226 Difference]: Without dead ends: 2360 [2022-02-16 14:01:55,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=862, Invalid=2444, Unknown=0, NotChecked=0, Total=3306 [2022-02-16 14:01:55,888 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 235 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:01:55,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 193 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:01:55,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2360 states. [2022-02-16 14:01:55,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2360 to 2179. [2022-02-16 14:01:55,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2179 states, 2178 states have (on average 1.9095500459136823) internal successors, (4159), 2178 states have internal predecessors, (4159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:55,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2179 states to 2179 states and 4159 transitions. [2022-02-16 14:01:55,922 INFO L78 Accepts]: Start accepts. Automaton has 2179 states and 4159 transitions. Word has length 28 [2022-02-16 14:01:55,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:01:55,923 INFO L470 AbstractCegarLoop]: Abstraction has 2179 states and 4159 transitions. [2022-02-16 14:01:55,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:01:55,923 INFO L276 IsEmpty]: Start isEmpty. Operand 2179 states and 4159 transitions. [2022-02-16 14:01:55,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:01:55,927 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:01:55,927 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:01:55,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-16 14:01:56,150 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,SelfDestructingSolverStorable28 [2022-02-16 14:01:56,151 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:01:56,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:01:56,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1298198702, now seen corresponding path program 23 times [2022-02-16 14:01:56,151 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:01:56,151 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292294281] [2022-02-16 14:01:56,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:01:56,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:01:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:01:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:56,288 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:01:56,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292294281] [2022-02-16 14:01:56,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292294281] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:01:56,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702828578] [2022-02-16 14:01:56,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:01:56,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:56,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:01:56,291 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 14:01:56,321 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 14:01:56,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-16 14:01:56,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:01:56,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:01:56,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:01:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:56,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:01:58,433 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:58,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702828578] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:01:58,433 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:01:58,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-02-16 14:01:58,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575353649] [2022-02-16 14:01:58,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:01:58,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:01:58,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:01:58,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:01:58,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:01:58,434 INFO L87 Difference]: Start difference. First operand 2179 states and 4159 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:02:01,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:02:01,288 INFO L93 Difference]: Finished difference Result 2832 states and 5318 transitions. [2022-02-16 14:02:01,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-16 14:02:01,289 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 28 [2022-02-16 14:02:01,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:02:01,293 INFO L225 Difference]: With dead ends: 2832 [2022-02-16 14:02:01,293 INFO L226 Difference]: Without dead ends: 2760 [2022-02-16 14:02:01,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=959, Invalid=2947, Unknown=0, NotChecked=0, Total=3906 [2022-02-16 14:02:01,294 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 294 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:02:01,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 195 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:02:01,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2022-02-16 14:02:01,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2365. [2022-02-16 14:02:01,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 2364 states have (on average 1.905668358714044) internal successors, (4505), 2364 states have internal predecessors, (4505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:02:01,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 4505 transitions. [2022-02-16 14:02:01,324 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 4505 transitions. Word has length 28 [2022-02-16 14:02:01,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:02:01,324 INFO L470 AbstractCegarLoop]: Abstraction has 2365 states and 4505 transitions. [2022-02-16 14:02:01,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:02:01,325 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 4505 transitions. [2022-02-16 14:02:01,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:02:01,327 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:02:01,327 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:02:01,343 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 14:02:01,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:02:01,528 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:02:01,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:02:01,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1060060430, now seen corresponding path program 24 times [2022-02-16 14:02:01,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:02:01,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541197802] [2022-02-16 14:02:01,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:02:01,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:02:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:02:01,675 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:02:01,675 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:02:01,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541197802] [2022-02-16 14:02:01,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541197802] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:02:01,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044584399] [2022-02-16 14:02:01,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:02:01,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:02:01,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:02:01,677 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 14:02:01,678 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 14:02:01,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:02:01,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:02:01,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:02:01,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:02:02,122 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:02:02,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:02:03,760 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:02:03,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044584399] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:02:03,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:02:03,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-02-16 14:02:03,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527819958] [2022-02-16 14:02:03,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:02:03,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:02:03,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:02:03,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:02:03,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:02:03,761 INFO L87 Difference]: Start difference. First operand 2365 states and 4505 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:02:06,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:02:06,445 INFO L93 Difference]: Finished difference Result 2951 states and 5523 transitions. [2022-02-16 14:02:06,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-16 14:02:06,445 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 28 [2022-02-16 14:02:06,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:02:06,451 INFO L225 Difference]: With dead ends: 2951 [2022-02-16 14:02:06,452 INFO L226 Difference]: Without dead ends: 2910 [2022-02-16 14:02:06,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1003, Invalid=2903, Unknown=0, NotChecked=0, Total=3906 [2022-02-16 14:02:06,453 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 240 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:02:06,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 153 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:02:06,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2022-02-16 14:02:06,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2441. [2022-02-16 14:02:06,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2441 states, 2440 states have (on average 1.8872950819672132) internal successors, (4605), 2440 states have internal predecessors, (4605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:02:06,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 4605 transitions. [2022-02-16 14:02:06,493 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 4605 transitions. Word has length 28 [2022-02-16 14:02:06,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:02:06,493 INFO L470 AbstractCegarLoop]: Abstraction has 2441 states and 4605 transitions. [2022-02-16 14:02:06,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:02:06,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 4605 transitions. [2022-02-16 14:02:06,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:02:06,497 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:02:06,498 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:02:06,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-16 14:02:06,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:02:06,721 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:02:06,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:02:06,722 INFO L85 PathProgramCache]: Analyzing trace with hash -505974702, now seen corresponding path program 25 times [2022-02-16 14:02:06,722 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:02:06,722 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607656373] [2022-02-16 14:02:06,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:02:06,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:02:06,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:02:06,836 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:02:06,837 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:02:06,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607656373] [2022-02-16 14:02:06,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607656373] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:02:06,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662826511] [2022-02-16 14:02:06,837 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:02:06,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:02:06,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:02:06,838 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 14:02:06,865 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 14:02:06,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:02:06,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:02:06,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:02:07,274 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:02:07,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:02:08,613 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:02:08,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662826511] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:02:08,614 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:02:08,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-02-16 14:02:08,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608784288] [2022-02-16 14:02:08,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:02:08,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:02:08,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:02:08,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:02:08,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:02:08,615 INFO L87 Difference]: Start difference. First operand 2441 states and 4605 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:02:11,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:02:11,420 INFO L93 Difference]: Finished difference Result 3190 states and 5904 transitions. [2022-02-16 14:02:11,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-16 14:02:11,420 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 28 [2022-02-16 14:02:11,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:02:11,426 INFO L225 Difference]: With dead ends: 3190 [2022-02-16 14:02:11,426 INFO L226 Difference]: Without dead ends: 3131 [2022-02-16 14:02:11,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1447 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1084, Invalid=3206, Unknown=0, NotChecked=0, Total=4290 [2022-02-16 14:02:11,427 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 201 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:02:11,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 532 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:02:11,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2022-02-16 14:02:11,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 2670. [2022-02-16 14:02:11,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2670 states, 2669 states have (on average 1.8831022855001873) internal successors, (5026), 2669 states have internal predecessors, (5026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:02:11,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2670 states to 2670 states and 5026 transitions. [2022-02-16 14:02:11,468 INFO L78 Accepts]: Start accepts. Automaton has 2670 states and 5026 transitions. Word has length 28 [2022-02-16 14:02:11,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:02:11,468 INFO L470 AbstractCegarLoop]: Abstraction has 2670 states and 5026 transitions. [2022-02-16 14:02:11,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:02:11,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2670 states and 5026 transitions. [2022-02-16 14:02:11,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:02:11,472 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:02:11,472 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:02:11,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-16 14:02:11,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:02:11,687 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:02:11,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:02:11,688 INFO L85 PathProgramCache]: Analyzing trace with hash 29720206, now seen corresponding path program 26 times [2022-02-16 14:02:11,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:02:11,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806752072] [2022-02-16 14:02:11,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:02:11,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:02:11,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:02:11,812 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:02:11,812 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:02:11,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806752072] [2022-02-16 14:02:11,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806752072] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:02:11,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214896203] [2022-02-16 14:02:11,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:02:11,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:02:11,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:02:11,813 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 14:02:11,849 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 14:02:11,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:02:11,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:02:11,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:02:11,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:02:12,428 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:02:12,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:02:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:02:14,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214896203] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:02:14,140 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:02:14,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-02-16 14:02:14,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124374236] [2022-02-16 14:02:14,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:02:14,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:02:14,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:02:14,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:02:14,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:02:14,142 INFO L87 Difference]: Start difference. First operand 2670 states and 5026 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:02:17,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:02:17,145 INFO L93 Difference]: Finished difference Result 3318 states and 6130 transitions. [2022-02-16 14:02:17,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-16 14:02:17,146 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 28 [2022-02-16 14:02:17,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:02:17,152 INFO L225 Difference]: With dead ends: 3318 [2022-02-16 14:02:17,153 INFO L226 Difference]: Without dead ends: 3272 [2022-02-16 14:02:17,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=933, Invalid=3227, Unknown=0, NotChecked=0, Total=4160 [2022-02-16 14:02:17,154 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 322 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:02:17,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 279 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:02:17,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2022-02-16 14:02:17,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 2887. [2022-02-16 14:02:17,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2887 states, 2886 states have (on average 1.89015939015939) internal successors, (5455), 2886 states have internal predecessors, (5455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:02:17,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 5455 transitions. [2022-02-16 14:02:17,200 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 5455 transitions. Word has length 28 [2022-02-16 14:02:17,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:02:17,200 INFO L470 AbstractCegarLoop]: Abstraction has 2887 states and 5455 transitions. [2022-02-16 14:02:17,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:02:17,200 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 5455 transitions. [2022-02-16 14:02:17,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:02:17,205 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:02:17,205 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:02:17,231 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 14:02:17,419 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,SelfDestructingSolverStorable32 [2022-02-16 14:02:17,419 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:02:17,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:02:17,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2067889934, now seen corresponding path program 27 times [2022-02-16 14:02:17,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:02:17,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750055944] [2022-02-16 14:02:17,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:02:17,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:02:17,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:02:17,526 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:02:17,526 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:02:17,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750055944] [2022-02-16 14:02:17,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750055944] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:02:17,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767068053] [2022-02-16 14:02:17,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:02:17,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:02:17,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:02:17,528 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 14:02:17,557 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 14:02:17,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:02:17,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:02:17,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:02:17,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:02:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:02:17,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:02:19,377 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:02:19,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767068053] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:02:19,378 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:02:19,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-02-16 14:02:19,378 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878454777] [2022-02-16 14:02:19,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:02:19,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:02:19,378 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:02:19,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:02:19,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:02:19,378 INFO L87 Difference]: Start difference. First operand 2887 states and 5455 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:02:22,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:02:22,101 INFO L93 Difference]: Finished difference Result 3274 states and 6124 transitions. [2022-02-16 14:02:22,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-16 14:02:22,102 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 28 [2022-02-16 14:02:22,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:02:22,108 INFO L225 Difference]: With dead ends: 3274 [2022-02-16 14:02:22,108 INFO L226 Difference]: Without dead ends: 3232 [2022-02-16 14:02:22,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1469 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1031, Invalid=3391, Unknown=0, NotChecked=0, Total=4422 [2022-02-16 14:02:22,109 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 180 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:02:22,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 327 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:02:22,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2022-02-16 14:02:22,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 2916. [2022-02-16 14:02:22,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2915 states have (on average 1.8867924528301887) internal successors, (5500), 2915 states have internal predecessors, (5500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:02:22,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 5500 transitions. [2022-02-16 14:02:22,158 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 5500 transitions. Word has length 28 [2022-02-16 14:02:22,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:02:22,158 INFO L470 AbstractCegarLoop]: Abstraction has 2916 states and 5500 transitions. [2022-02-16 14:02:22,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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 14:02:22,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 5500 transitions. [2022-02-16 14:02:22,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-16 14:02:22,163 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:02:22,163 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:02:22,189 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 14:02:22,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:02:22,383 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:02:22,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:02:22,384 INFO L85 PathProgramCache]: Analyzing trace with hash 155090004, now seen corresponding path program 28 times [2022-02-16 14:02:22,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:02:22,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722905867] [2022-02-16 14:02:22,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:02:22,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:02:22,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:02:22,648 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:02:22,648 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:02:22,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722905867] [2022-02-16 14:02:22,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722905867] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:02:22,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703256428] [2022-02-16 14:02:22,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:02:22,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:02:22,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:02:22,650 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 14:02:22,681 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 14:02:22,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:02:22,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:02:22,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 14:02:22,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:02:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:02:23,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:02:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:02:25,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703256428] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:02:25,014 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:02:25,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-16 14:02:25,014 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988456363] [2022-02-16 14:02:25,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:02:25,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-16 14:02:25,015 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:02:25,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-16 14:02:25,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=605, Unknown=0, NotChecked=0, Total=812 [2022-02-16 14:02:25,015 INFO L87 Difference]: Start difference. First operand 2916 states and 5500 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:02:29,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:02:29,795 INFO L93 Difference]: Finished difference Result 4241 states and 7920 transitions. [2022-02-16 14:02:29,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-16 14:02:29,796 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-16 14:02:29,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:02:29,801 INFO L225 Difference]: With dead ends: 4241 [2022-02-16 14:02:29,801 INFO L226 Difference]: Without dead ends: 4178 [2022-02-16 14:02:29,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2791 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1877, Invalid=5779, Unknown=0, NotChecked=0, Total=7656 [2022-02-16 14:02:29,803 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 504 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:02:29,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 509 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:02:29,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4178 states. [2022-02-16 14:02:29,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4178 to 3185. [2022-02-16 14:02:29,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3185 states, 3184 states have (on average 1.902324120603015) internal successors, (6057), 3184 states have internal predecessors, (6057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:02:29,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3185 states to 3185 states and 6057 transitions. [2022-02-16 14:02:29,871 INFO L78 Accepts]: Start accepts. Automaton has 3185 states and 6057 transitions. Word has length 30 [2022-02-16 14:02:29,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:02:29,872 INFO L470 AbstractCegarLoop]: Abstraction has 3185 states and 6057 transitions. [2022-02-16 14:02:29,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:02:29,872 INFO L276 IsEmpty]: Start isEmpty. Operand 3185 states and 6057 transitions. [2022-02-16 14:02:29,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-16 14:02:29,877 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:02:29,877 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:02:29,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-16 14:02:30,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:02:30,091 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:02:30,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:02:30,092 INFO L85 PathProgramCache]: Analyzing trace with hash -313279156, now seen corresponding path program 29 times [2022-02-16 14:02:30,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:02:30,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009027023] [2022-02-16 14:02:30,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:02:30,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:02:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:02:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:02:30,262 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:02:30,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009027023] [2022-02-16 14:02:30,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009027023] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:02:30,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890156383] [2022-02-16 14:02:30,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:02:30,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:02:30,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:02:30,267 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 14:02:30,269 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 14:02:30,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-02-16 14:02:30,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:02:30,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 14:02:30,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:02:30,793 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:02:30,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:02:32,977 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:02:32,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890156383] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:02:32,978 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:02:32,978 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-16 14:02:32,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993423522] [2022-02-16 14:02:32,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:02:32,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-16 14:02:32,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:02:32,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-16 14:02:32,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2022-02-16 14:02:32,979 INFO L87 Difference]: Start difference. First operand 3185 states and 6057 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 14:02:37,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:02:37,362 INFO L93 Difference]: Finished difference Result 3701 states and 6914 transitions. [2022-02-16 14:02:37,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-16 14:02:37,363 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 30 [2022-02-16 14:02:37,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:02:37,367 INFO L225 Difference]: With dead ends: 3701 [2022-02-16 14:02:37,367 INFO L226 Difference]: Without dead ends: 3661 [2022-02-16 14:02:37,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1104, Invalid=3186, Unknown=0, NotChecked=0, Total=4290 [2022-02-16 14:02:37,368 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 198 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:02:37,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 609 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:02:37,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3661 states. [2022-02-16 14:02:37,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3661 to 3299. [2022-02-16 14:02:37,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3299 states, 3298 states have (on average 1.900545785324439) internal successors, (6268), 3298 states have internal predecessors, (6268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:02:37,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3299 states to 3299 states and 6268 transitions. [2022-02-16 14:02:37,401 INFO L78 Accepts]: Start accepts. Automaton has 3299 states and 6268 transitions. Word has length 30 [2022-02-16 14:02:37,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:02:37,401 INFO L470 AbstractCegarLoop]: Abstraction has 3299 states and 6268 transitions. [2022-02-16 14:02:37,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 14:02:37,401 INFO L276 IsEmpty]: Start isEmpty. Operand 3299 states and 6268 transitions. [2022-02-16 14:02:37,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-16 14:02:37,405 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:02:37,405 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:02:37,420 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 14:02:37,605 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,SelfDestructingSolverStorable35 [2022-02-16 14:02:37,605 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:02:37,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:02:37,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1080431248, now seen corresponding path program 30 times [2022-02-16 14:02:37,606 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:02:37,606 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666248643] [2022-02-16 14:02:37,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:02:37,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:02:37,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:02:37,766 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:02:37,767 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:02:37,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666248643] [2022-02-16 14:02:37,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666248643] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:02:37,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083904194] [2022-02-16 14:02:37,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:02:37,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:02:37,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:02:37,768 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 14:02:37,769 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 14:02:37,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-02-16 14:02:37,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:02:37,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 14:02:37,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:02:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:02:38,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:02:39,457 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:02:39,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083904194] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:02:39,457 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:02:39,457 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-16 14:02:39,457 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107060063] [2022-02-16 14:02:39,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:02:39,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-16 14:02:39,457 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:02:39,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-16 14:02:39,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=548, Unknown=0, NotChecked=0, Total=756 [2022-02-16 14:02:39,458 INFO L87 Difference]: Start difference. First operand 3299 states and 6268 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 14:02:42,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:02:42,199 INFO L93 Difference]: Finished difference Result 3964 states and 7397 transitions. [2022-02-16 14:02:42,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-16 14:02:42,200 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 30 [2022-02-16 14:02:42,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:02:42,205 INFO L225 Difference]: With dead ends: 3964 [2022-02-16 14:02:42,205 INFO L226 Difference]: Without dead ends: 3884 [2022-02-16 14:02:42,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1852 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1526, Invalid=3876, Unknown=0, NotChecked=0, Total=5402 [2022-02-16 14:02:42,205 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 211 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:02:42,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 303 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:02:42,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3884 states. [2022-02-16 14:02:42,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3884 to 3480. [2022-02-16 14:02:42,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3480 states, 3479 states have (on average 1.896521989077321) internal successors, (6598), 3479 states have internal predecessors, (6598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:02:42,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3480 states to 3480 states and 6598 transitions. [2022-02-16 14:02:42,246 INFO L78 Accepts]: Start accepts. Automaton has 3480 states and 6598 transitions. Word has length 30 [2022-02-16 14:02:42,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:02:42,246 INFO L470 AbstractCegarLoop]: Abstraction has 3480 states and 6598 transitions. [2022-02-16 14:02:42,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 14:02:42,246 INFO L276 IsEmpty]: Start isEmpty. Operand 3480 states and 6598 transitions. [2022-02-16 14:02:42,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:02:42,250 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:02:42,250 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:02:42,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-16 14:02:42,450 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,SelfDestructingSolverStorable36 [2022-02-16 14:02:42,451 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:02:42,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:02:42,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1894921642, now seen corresponding path program 31 times [2022-02-16 14:02:42,451 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:02:42,451 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979352031] [2022-02-16 14:02:42,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:02:42,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:02:42,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:02:43,862 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:02:43,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:02:43,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979352031] [2022-02-16 14:02:43,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979352031] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:02:43,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732412176] [2022-02-16 14:02:43,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:02:43,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:02:43,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:02:43,864 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 14:02:43,891 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 14:02:43,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:02:43,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:02:43,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:02:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:02:44,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:02:46,996 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:02:46,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732412176] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:02:46,996 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:02:46,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:02:46,996 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016753888] [2022-02-16 14:02:46,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:02:46,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:02:46,996 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:02:46,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:02:46,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=790, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:02:46,997 INFO L87 Difference]: Start difference. First operand 3480 states and 6598 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:02:53,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:02:53,932 INFO L93 Difference]: Finished difference Result 4323 states and 8056 transitions. [2022-02-16 14:02:53,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-16 14:02:53,933 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:02:53,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:02:53,938 INFO L225 Difference]: With dead ends: 4323 [2022-02-16 14:02:53,938 INFO L226 Difference]: Without dead ends: 4279 [2022-02-16 14:02:53,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2437 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1693, Invalid=5789, Unknown=0, NotChecked=0, Total=7482 [2022-02-16 14:02:53,939 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 441 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:02:53,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 427 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:02:53,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4279 states. [2022-02-16 14:02:53,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4279 to 3719. [2022-02-16 14:02:53,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3719 states, 3718 states have (on average 1.9090909090909092) internal successors, (7098), 3718 states have internal predecessors, (7098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:02:53,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3719 states to 3719 states and 7098 transitions. [2022-02-16 14:02:53,989 INFO L78 Accepts]: Start accepts. Automaton has 3719 states and 7098 transitions. Word has length 32 [2022-02-16 14:02:53,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:02:53,990 INFO L470 AbstractCegarLoop]: Abstraction has 3719 states and 7098 transitions. [2022-02-16 14:02:53,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:02:53,990 INFO L276 IsEmpty]: Start isEmpty. Operand 3719 states and 7098 transitions. [2022-02-16 14:02:53,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:02:53,994 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:02:53,994 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:02:54,010 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 14:02:54,194 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,SelfDestructingSolverStorable37 [2022-02-16 14:02:54,195 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:02:54,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:02:54,195 INFO L85 PathProgramCache]: Analyzing trace with hash 646320222, now seen corresponding path program 32 times [2022-02-16 14:02:54,195 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:02:54,195 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894815513] [2022-02-16 14:02:54,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:02:54,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:02:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:02:54,597 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:02:54,598 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:02:54,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894815513] [2022-02-16 14:02:54,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894815513] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:02:54,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041106769] [2022-02-16 14:02:54,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:02:54,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:02:54,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:02:54,599 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 14:02:54,599 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 14:02:54,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:02:54,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:02:54,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:02:54,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:02:55,135 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:02:55,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:02:57,488 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:02:57,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041106769] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:02:57,489 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:02:57,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:02:57,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566062495] [2022-02-16 14:02:57,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:02:57,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:02:57,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:02:57,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:02:57,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=775, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:02:57,489 INFO L87 Difference]: Start difference. First operand 3719 states and 7098 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:01,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:01,717 INFO L93 Difference]: Finished difference Result 4336 states and 8055 transitions. [2022-02-16 14:03:01,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-16 14:03:01,717 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:03:01,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:01,722 INFO L225 Difference]: With dead ends: 4336 [2022-02-16 14:03:01,722 INFO L226 Difference]: Without dead ends: 4289 [2022-02-16 14:03:01,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2548 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1716, Invalid=5766, Unknown=0, NotChecked=0, Total=7482 [2022-02-16 14:03:01,723 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 398 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:01,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 356 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:03:01,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4289 states. [2022-02-16 14:03:01,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4289 to 3786. [2022-02-16 14:03:01,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3786 states, 3785 states have (on average 1.9117569352708057) internal successors, (7236), 3785 states have internal predecessors, (7236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:01,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3786 states to 3786 states and 7236 transitions. [2022-02-16 14:03:01,763 INFO L78 Accepts]: Start accepts. Automaton has 3786 states and 7236 transitions. Word has length 32 [2022-02-16 14:03:01,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:01,764 INFO L470 AbstractCegarLoop]: Abstraction has 3786 states and 7236 transitions. [2022-02-16 14:03:01,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:01,764 INFO L276 IsEmpty]: Start isEmpty. Operand 3786 states and 7236 transitions. [2022-02-16 14:03:01,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:03:01,768 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:01,768 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:01,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:01,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-16 14:03:01,969 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:03:01,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:01,969 INFO L85 PathProgramCache]: Analyzing trace with hash 2061708118, now seen corresponding path program 33 times [2022-02-16 14:03:01,969 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:01,969 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685723777] [2022-02-16 14:03:01,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:01,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:10,328 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:10,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685723777] [2022-02-16 14:03:10,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685723777] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:10,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060970349] [2022-02-16 14:03:10,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:03:10,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:10,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:10,330 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 14:03:10,330 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 14:03:10,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-02-16 14:03:10,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:10,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:03:10,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:10,984 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:10,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:13,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060970349] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:13,587 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:13,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:03:13,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410054718] [2022-02-16 14:03:13,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:13,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:03:13,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:13,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:03:13,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=791, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:03:13,588 INFO L87 Difference]: Start difference. First operand 3786 states and 7236 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:22,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:22,099 INFO L93 Difference]: Finished difference Result 4749 states and 8909 transitions. [2022-02-16 14:03:22,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-16 14:03:22,100 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:03:22,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:22,105 INFO L225 Difference]: With dead ends: 4749 [2022-02-16 14:03:22,105 INFO L226 Difference]: Without dead ends: 4680 [2022-02-16 14:03:22,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3225 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=2084, Invalid=7228, Unknown=0, NotChecked=0, Total=9312 [2022-02-16 14:03:22,105 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 379 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:22,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 493 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:03:22,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4680 states. [2022-02-16 14:03:22,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4680 to 3976. [2022-02-16 14:03:22,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3976 states, 3975 states have (on average 1.9227672955974844) internal successors, (7643), 3975 states have internal predecessors, (7643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:22,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3976 states to 3976 states and 7643 transitions. [2022-02-16 14:03:22,152 INFO L78 Accepts]: Start accepts. Automaton has 3976 states and 7643 transitions. Word has length 32 [2022-02-16 14:03:22,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:22,152 INFO L470 AbstractCegarLoop]: Abstraction has 3976 states and 7643 transitions. [2022-02-16 14:03:22,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:22,152 INFO L276 IsEmpty]: Start isEmpty. Operand 3976 states and 7643 transitions. [2022-02-16 14:03:22,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:03:22,157 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:22,157 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:22,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-02-16 14:03:22,357 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,SelfDestructingSolverStorable39 [2022-02-16 14:03:22,357 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:03:22,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:22,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1520640878, now seen corresponding path program 34 times [2022-02-16 14:03:22,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:22,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086761291] [2022-02-16 14:03:22,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:22,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:22,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:25,331 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:25,331 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:25,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086761291] [2022-02-16 14:03:25,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086761291] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:25,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138674254] [2022-02-16 14:03:25,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:03:25,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:25,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:25,333 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 14:03:25,333 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 14:03:25,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:03:25,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:25,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:03:25,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:26,028 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:26,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:28,724 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:28,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138674254] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:28,724 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:28,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:03:28,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736537444] [2022-02-16 14:03:28,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:28,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:03:28,724 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:28,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:03:28,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:03:28,727 INFO L87 Difference]: Start difference. First operand 3976 states and 7643 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:35,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:35,572 INFO L93 Difference]: Finished difference Result 5013 states and 9472 transitions. [2022-02-16 14:03:35,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-16 14:03:35,572 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:03:35,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:35,578 INFO L225 Difference]: With dead ends: 5013 [2022-02-16 14:03:35,578 INFO L226 Difference]: Without dead ends: 4938 [2022-02-16 14:03:35,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3019 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1884, Invalid=6858, Unknown=0, NotChecked=0, Total=8742 [2022-02-16 14:03:35,578 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 344 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:35,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 671 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 14:03:35,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4938 states. [2022-02-16 14:03:35,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4938 to 4231. [2022-02-16 14:03:35,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4231 states, 4230 states have (on average 1.916548463356974) internal successors, (8107), 4230 states have internal predecessors, (8107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:35,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4231 states to 4231 states and 8107 transitions. [2022-02-16 14:03:35,629 INFO L78 Accepts]: Start accepts. Automaton has 4231 states and 8107 transitions. Word has length 32 [2022-02-16 14:03:35,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:35,629 INFO L470 AbstractCegarLoop]: Abstraction has 4231 states and 8107 transitions. [2022-02-16 14:03:35,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:35,629 INFO L276 IsEmpty]: Start isEmpty. Operand 4231 states and 8107 transitions. [2022-02-16 14:03:35,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:03:35,633 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:35,633 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:35,649 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 14:03:35,834 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,SelfDestructingSolverStorable40 [2022-02-16 14:03:35,835 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:03:35,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:35,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1762234326, now seen corresponding path program 35 times [2022-02-16 14:03:35,835 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:35,835 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279815954] [2022-02-16 14:03:35,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:35,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:36,443 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:36,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:36,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279815954] [2022-02-16 14:03:36,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279815954] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:36,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354910752] [2022-02-16 14:03:36,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:03:36,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:36,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:36,444 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 14:03:36,445 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 14:03:36,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-02-16 14:03:36,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:36,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:03:36,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:37,233 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:37,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:40,059 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:40,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354910752] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:40,060 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:40,060 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:03:40,060 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346525713] [2022-02-16 14:03:40,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:40,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:03:40,060 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:40,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:03:40,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=789, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:03:40,061 INFO L87 Difference]: Start difference. First operand 4231 states and 8107 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:50,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:03:50,027 INFO L93 Difference]: Finished difference Result 5862 states and 11022 transitions. [2022-02-16 14:03:50,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-16 14:03:50,028 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:03:50,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:03:50,033 INFO L225 Difference]: With dead ends: 5862 [2022-02-16 14:03:50,033 INFO L226 Difference]: Without dead ends: 5770 [2022-02-16 14:03:50,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4049 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=2494, Invalid=8426, Unknown=0, NotChecked=0, Total=10920 [2022-02-16 14:03:50,034 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 512 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:03:50,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 783 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 14:03:50,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5770 states. [2022-02-16 14:03:50,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5770 to 4869. [2022-02-16 14:03:50,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4869 states, 4868 states have (on average 1.9155710764174199) internal successors, (9325), 4868 states have internal predecessors, (9325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:50,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4869 states to 4869 states and 9325 transitions. [2022-02-16 14:03:50,087 INFO L78 Accepts]: Start accepts. Automaton has 4869 states and 9325 transitions. Word has length 32 [2022-02-16 14:03:50,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:03:50,087 INFO L470 AbstractCegarLoop]: Abstraction has 4869 states and 9325 transitions. [2022-02-16 14:03:50,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:03:50,087 INFO L276 IsEmpty]: Start isEmpty. Operand 4869 states and 9325 transitions. [2022-02-16 14:03:50,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:03:50,091 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:03:50,091 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:03:50,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-16 14:03:50,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-02-16 14:03:50,292 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:03:50,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:03:50,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1306606994, now seen corresponding path program 36 times [2022-02-16 14:03:50,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:03:50,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395386999] [2022-02-16 14:03:50,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:03:50,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:03:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:03:50,539 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:50,540 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:03:50,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395386999] [2022-02-16 14:03:50,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395386999] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:03:50,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742549402] [2022-02-16 14:03:50,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:03:50,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:03:50,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:03:50,541 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 14:03:50,547 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 14:03:50,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-02-16 14:03:50,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:03:50,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:03:50,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:03:51,382 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:51,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:03:54,440 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:03:54,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742549402] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:03:54,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:03:54,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:03:54,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310861043] [2022-02-16 14:03:54,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:03:54,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:03:54,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:03:54,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:03:54,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:03:54,441 INFO L87 Difference]: Start difference. First operand 4869 states and 9325 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:00,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:00,158 INFO L93 Difference]: Finished difference Result 5812 states and 11026 transitions. [2022-02-16 14:04:00,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-16 14:04:00,158 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:04:00,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:00,165 INFO L225 Difference]: With dead ends: 5812 [2022-02-16 14:04:00,166 INFO L226 Difference]: Without dead ends: 5771 [2022-02-16 14:04:00,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1151, Invalid=4251, Unknown=0, NotChecked=0, Total=5402 [2022-02-16 14:04:00,166 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 296 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:00,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 447 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:04:00,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5771 states. [2022-02-16 14:04:00,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5771 to 5239. [2022-02-16 14:04:00,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5239 states, 5238 states have (on average 1.919434898816342) internal successors, (10054), 5238 states have internal predecessors, (10054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:00,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5239 states to 5239 states and 10054 transitions. [2022-02-16 14:04:00,229 INFO L78 Accepts]: Start accepts. Automaton has 5239 states and 10054 transitions. Word has length 32 [2022-02-16 14:04:00,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:00,229 INFO L470 AbstractCegarLoop]: Abstraction has 5239 states and 10054 transitions. [2022-02-16 14:04:00,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:00,229 INFO L276 IsEmpty]: Start isEmpty. Operand 5239 states and 10054 transitions. [2022-02-16 14:04:00,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:04:00,235 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:00,235 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:00,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:00,435 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,SelfDestructingSolverStorable42 [2022-02-16 14:04:00,436 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:04:00,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:00,436 INFO L85 PathProgramCache]: Analyzing trace with hash 762331026, now seen corresponding path program 37 times [2022-02-16 14:04:00,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:00,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942387087] [2022-02-16 14:04:00,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:00,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:00,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:00,643 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:00,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:00,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942387087] [2022-02-16 14:04:00,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942387087] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:00,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613056877] [2022-02-16 14:04:00,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:04:00,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:00,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:00,645 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 14:04:00,652 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 14:04:00,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:00,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:04:00,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:01,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:04,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613056877] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:04,090 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:04,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:04:04,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547525760] [2022-02-16 14:04:04,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:04,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:04:04,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:04,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:04:04,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=806, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:04:04,091 INFO L87 Difference]: Start difference. First operand 5239 states and 10054 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:09,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:09,520 INFO L93 Difference]: Finished difference Result 6172 states and 11757 transitions. [2022-02-16 14:04:09,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-16 14:04:09,521 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:04:09,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:09,528 INFO L225 Difference]: With dead ends: 6172 [2022-02-16 14:04:09,528 INFO L226 Difference]: Without dead ends: 6111 [2022-02-16 14:04:09,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2341 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1500, Invalid=5306, Unknown=0, NotChecked=0, Total=6806 [2022-02-16 14:04:09,529 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 299 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:09,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 659 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:04:09,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6111 states. [2022-02-16 14:04:09,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6111 to 5458. [2022-02-16 14:04:09,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5458 states, 5457 states have (on average 1.9186366135239143) internal successors, (10470), 5457 states have internal predecessors, (10470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:09,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5458 states to 5458 states and 10470 transitions. [2022-02-16 14:04:09,594 INFO L78 Accepts]: Start accepts. Automaton has 5458 states and 10470 transitions. Word has length 32 [2022-02-16 14:04:09,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:09,594 INFO L470 AbstractCegarLoop]: Abstraction has 5458 states and 10470 transitions. [2022-02-16 14:04:09,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:09,594 INFO L276 IsEmpty]: Start isEmpty. Operand 5458 states and 10470 transitions. [2022-02-16 14:04:09,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:04:09,601 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:09,601 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:09,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:09,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:09,802 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:04:09,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:09,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1658801698, now seen corresponding path program 38 times [2022-02-16 14:04:09,803 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:09,803 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996743518] [2022-02-16 14:04:09,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:09,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:09,960 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:09,960 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:09,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996743518] [2022-02-16 14:04:09,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996743518] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:09,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923615187] [2022-02-16 14:04:09,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:04:09,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:09,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:09,961 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 14:04:09,968 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 14:04:09,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:04:09,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:09,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:04:09,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:10,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:12,316 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:12,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923615187] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:12,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:12,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:04:12,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834466561] [2022-02-16 14:04:12,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:12,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:04:12,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:12,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:04:12,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=791, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:04:12,317 INFO L87 Difference]: Start difference. First operand 5458 states and 10470 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:15,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:15,250 INFO L93 Difference]: Finished difference Result 5887 states and 11154 transitions. [2022-02-16 14:04:15,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-16 14:04:15,251 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:04:15,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:15,257 INFO L225 Difference]: With dead ends: 5887 [2022-02-16 14:04:15,257 INFO L226 Difference]: Without dead ends: 5816 [2022-02-16 14:04:15,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2174 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1508, Invalid=4972, Unknown=0, NotChecked=0, Total=6480 [2022-02-16 14:04:15,258 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 203 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:15,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 695 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:04:15,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5816 states. [2022-02-16 14:04:15,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5816 to 5508. [2022-02-16 14:04:15,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5508 states, 5507 states have (on average 1.9157435990557472) internal successors, (10550), 5507 states have internal predecessors, (10550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:15,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5508 states to 5508 states and 10550 transitions. [2022-02-16 14:04:15,317 INFO L78 Accepts]: Start accepts. Automaton has 5508 states and 10550 transitions. Word has length 32 [2022-02-16 14:04:15,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:15,317 INFO L470 AbstractCegarLoop]: Abstraction has 5508 states and 10550 transitions. [2022-02-16 14:04:15,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:15,317 INFO L276 IsEmpty]: Start isEmpty. Operand 5508 states and 10550 transitions. [2022-02-16 14:04:15,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:04:15,322 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:15,322 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:15,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:15,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:15,523 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:04:15,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:15,523 INFO L85 PathProgramCache]: Analyzing trace with hash 894585806, now seen corresponding path program 39 times [2022-02-16 14:04:15,523 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:15,523 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140125418] [2022-02-16 14:04:15,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:15,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:16,035 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:16,035 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:16,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140125418] [2022-02-16 14:04:16,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140125418] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:16,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548206328] [2022-02-16 14:04:16,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:04:16,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:16,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:16,040 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 14:04:16,041 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 14:04:16,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-16 14:04:16,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:16,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:04:16,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:16,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:19,804 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:19,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548206328] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:19,804 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:19,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:04:19,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146753885] [2022-02-16 14:04:19,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:19,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:04:19,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:19,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:04:19,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:04:19,805 INFO L87 Difference]: Start difference. First operand 5508 states and 10550 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:29,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:29,040 INFO L93 Difference]: Finished difference Result 6737 states and 12733 transitions. [2022-02-16 14:04:29,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-16 14:04:29,041 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:04:29,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:29,049 INFO L225 Difference]: With dead ends: 6737 [2022-02-16 14:04:29,049 INFO L226 Difference]: Without dead ends: 6673 [2022-02-16 14:04:29,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4039 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=2453, Invalid=8259, Unknown=0, NotChecked=0, Total=10712 [2022-02-16 14:04:29,050 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 427 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:29,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 619 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 14:04:29,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6673 states. [2022-02-16 14:04:29,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6673 to 5866. [2022-02-16 14:04:29,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5866 states, 5865 states have (on average 1.9128729752770675) internal successors, (11219), 5865 states have internal predecessors, (11219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:29,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5866 states to 5866 states and 11219 transitions. [2022-02-16 14:04:29,143 INFO L78 Accepts]: Start accepts. Automaton has 5866 states and 11219 transitions. Word has length 32 [2022-02-16 14:04:29,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:29,143 INFO L470 AbstractCegarLoop]: Abstraction has 5866 states and 11219 transitions. [2022-02-16 14:04:29,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:29,144 INFO L276 IsEmpty]: Start isEmpty. Operand 5866 states and 11219 transitions. [2022-02-16 14:04:29,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:04:29,150 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:29,150 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:29,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:29,350 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,SelfDestructingSolverStorable45 [2022-02-16 14:04:29,350 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:04:29,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:29,351 INFO L85 PathProgramCache]: Analyzing trace with hash -2106990958, now seen corresponding path program 40 times [2022-02-16 14:04:29,351 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:29,351 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249119439] [2022-02-16 14:04:29,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:29,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:29,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:29,685 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:29,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249119439] [2022-02-16 14:04:29,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249119439] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:29,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677241498] [2022-02-16 14:04:29,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:04:29,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:29,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:29,687 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 14:04:29,687 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 14:04:29,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:04:29,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:29,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:04:29,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:30,532 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:30,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:33,440 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:33,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677241498] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:33,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:33,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:04:33,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303667521] [2022-02-16 14:04:33,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:33,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:04:33,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:33,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:04:33,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=796, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:04:33,441 INFO L87 Difference]: Start difference. First operand 5866 states and 11219 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:44,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:44,396 INFO L93 Difference]: Finished difference Result 7407 states and 13905 transitions. [2022-02-16 14:04:44,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-16 14:04:44,397 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:04:44,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:44,404 INFO L225 Difference]: With dead ends: 7407 [2022-02-16 14:04:44,404 INFO L226 Difference]: Without dead ends: 7320 [2022-02-16 14:04:44,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4509 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=2667, Invalid=8889, Unknown=0, NotChecked=0, Total=11556 [2022-02-16 14:04:44,405 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 446 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:44,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 491 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 14:04:44,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7320 states. [2022-02-16 14:04:44,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7320 to 6234. [2022-02-16 14:04:44,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6234 states, 6233 states have (on average 1.9159313332263757) internal successors, (11942), 6233 states have internal predecessors, (11942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:44,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6234 states to 6234 states and 11942 transitions. [2022-02-16 14:04:44,512 INFO L78 Accepts]: Start accepts. Automaton has 6234 states and 11942 transitions. Word has length 32 [2022-02-16 14:04:44,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:44,512 INFO L470 AbstractCegarLoop]: Abstraction has 6234 states and 11942 transitions. [2022-02-16 14:04:44,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:44,512 INFO L276 IsEmpty]: Start isEmpty. Operand 6234 states and 11942 transitions. [2022-02-16 14:04:44,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:04:44,520 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:44,520 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:44,536 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 14:04:44,721 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,SelfDestructingSolverStorable46 [2022-02-16 14:04:44,722 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:04:44,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:44,722 INFO L85 PathProgramCache]: Analyzing trace with hash -394469358, now seen corresponding path program 41 times [2022-02-16 14:04:44,722 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:44,722 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753022520] [2022-02-16 14:04:44,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:44,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:44,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:04:45,187 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:45,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:04:45,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753022520] [2022-02-16 14:04:45,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753022520] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:04:45,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334508718] [2022-02-16 14:04:45,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:04:45,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:04:45,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:04:45,189 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 14:04:45,214 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 14:04:45,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-16 14:04:45,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:04:45,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:04:45,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:04:45,998 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:45,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:04:48,883 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:04:48,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334508718] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:04:48,883 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:04:48,883 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:04:48,883 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460726053] [2022-02-16 14:04:48,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:04:48,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:04:48,884 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:04:48,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:04:48,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:04:48,884 INFO L87 Difference]: Start difference. First operand 6234 states and 11942 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:56,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:04:56,531 INFO L93 Difference]: Finished difference Result 7324 states and 13945 transitions. [2022-02-16 14:04:56,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-16 14:04:56,532 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:04:56,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:04:56,540 INFO L225 Difference]: With dead ends: 7324 [2022-02-16 14:04:56,540 INFO L226 Difference]: Without dead ends: 7268 [2022-02-16 14:04:56,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2434 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1725, Invalid=5415, Unknown=0, NotChecked=0, Total=7140 [2022-02-16 14:04:56,541 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 452 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:04:56,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 303 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:04:56,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7268 states. [2022-02-16 14:04:56,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7268 to 6692. [2022-02-16 14:04:56,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6692 states, 6691 states have (on average 1.9170527574353609) internal successors, (12827), 6691 states have internal predecessors, (12827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:56,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6692 states to 6692 states and 12827 transitions. [2022-02-16 14:04:56,625 INFO L78 Accepts]: Start accepts. Automaton has 6692 states and 12827 transitions. Word has length 32 [2022-02-16 14:04:56,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:04:56,626 INFO L470 AbstractCegarLoop]: Abstraction has 6692 states and 12827 transitions. [2022-02-16 14:04:56,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:04:56,626 INFO L276 IsEmpty]: Start isEmpty. Operand 6692 states and 12827 transitions. [2022-02-16 14:04:56,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:04:56,634 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:04:56,634 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:04:56,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-02-16 14:04:56,846 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,SelfDestructingSolverStorable47 [2022-02-16 14:04:56,846 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:04:56,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:04:56,846 INFO L85 PathProgramCache]: Analyzing trace with hash 204178330, now seen corresponding path program 42 times [2022-02-16 14:04:56,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:04:56,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031868972] [2022-02-16 14:04:56,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:04:56,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:04:56,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:05:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:06,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:05:06,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031868972] [2022-02-16 14:05:06,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031868972] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:05:06,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161348119] [2022-02-16 14:05:06,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:05:06,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:05:06,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:05:06,530 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 14:05:06,531 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 14:05:06,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-16 14:05:06,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:05:06,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:05:06,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:05:07,134 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:07,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:05:09,271 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:09,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161348119] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:05:09,271 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:05:09,271 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:05:09,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088872797] [2022-02-16 14:05:09,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:05:09,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:05:09,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:05:09,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:05:09,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:05:09,272 INFO L87 Difference]: Start difference. First operand 6692 states and 12827 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:14,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:05:14,773 INFO L93 Difference]: Finished difference Result 7467 states and 14164 transitions. [2022-02-16 14:05:14,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-16 14:05:14,774 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:05:14,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:05:14,782 INFO L225 Difference]: With dead ends: 7467 [2022-02-16 14:05:14,783 INFO L226 Difference]: Without dead ends: 7389 [2022-02-16 14:05:14,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2895 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1917, Invalid=6273, Unknown=0, NotChecked=0, Total=8190 [2022-02-16 14:05:14,784 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 272 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:05:14,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 629 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:05:14,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7389 states. [2022-02-16 14:05:14,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7389 to 6856. [2022-02-16 14:05:14,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6856 states, 6855 states have (on average 1.9107221006564552) internal successors, (13098), 6855 states have internal predecessors, (13098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:14,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6856 states to 6856 states and 13098 transitions. [2022-02-16 14:05:14,881 INFO L78 Accepts]: Start accepts. Automaton has 6856 states and 13098 transitions. Word has length 32 [2022-02-16 14:05:14,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:05:14,881 INFO L470 AbstractCegarLoop]: Abstraction has 6856 states and 13098 transitions. [2022-02-16 14:05:14,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:14,881 INFO L276 IsEmpty]: Start isEmpty. Operand 6856 states and 13098 transitions. [2022-02-16 14:05:14,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:05:14,891 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:05:14,891 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:05:14,913 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 14:05:15,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:05:15,107 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:05:15,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:05:15,108 INFO L85 PathProgramCache]: Analyzing trace with hash 139484682, now seen corresponding path program 43 times [2022-02-16 14:05:15,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:05:15,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431138053] [2022-02-16 14:05:15,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:05:15,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:05:15,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:05:15,300 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:15,300 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:05:15,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431138053] [2022-02-16 14:05:15,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431138053] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:05:15,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468420395] [2022-02-16 14:05:15,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:05:15,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:05:15,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:05:15,302 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 14:05:15,330 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 14:05:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:05:15,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:05:15,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:05:16,192 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:16,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:05:19,215 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:19,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468420395] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:05:19,216 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:05:19,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:05:19,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972567595] [2022-02-16 14:05:19,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:05:19,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:05:19,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:05:19,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:05:19,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=800, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:05:19,217 INFO L87 Difference]: Start difference. First operand 6856 states and 13098 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:28,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:05:28,465 INFO L93 Difference]: Finished difference Result 8231 states and 15565 transitions. [2022-02-16 14:05:28,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-16 14:05:28,465 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:05:28,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:05:28,476 INFO L225 Difference]: With dead ends: 8231 [2022-02-16 14:05:28,476 INFO L226 Difference]: Without dead ends: 8175 [2022-02-16 14:05:28,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3918 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=2270, Invalid=8032, Unknown=0, NotChecked=0, Total=10302 [2022-02-16 14:05:28,477 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 361 mSDsluCounter, 1364 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-16 14:05:28,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 973 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-16 14:05:28,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8175 states. [2022-02-16 14:05:28,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8175 to 7329. [2022-02-16 14:05:28,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7329 states, 7328 states have (on average 1.9106168122270741) internal successors, (14001), 7328 states have internal predecessors, (14001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:28,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7329 states to 7329 states and 14001 transitions. [2022-02-16 14:05:28,583 INFO L78 Accepts]: Start accepts. Automaton has 7329 states and 14001 transitions. Word has length 32 [2022-02-16 14:05:28,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:05:28,584 INFO L470 AbstractCegarLoop]: Abstraction has 7329 states and 14001 transitions. [2022-02-16 14:05:28,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:28,584 INFO L276 IsEmpty]: Start isEmpty. Operand 7329 states and 14001 transitions. [2022-02-16 14:05:28,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:05:28,592 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:05:28,592 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:05:28,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-02-16 14:05:28,792 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,SelfDestructingSolverStorable49 [2022-02-16 14:05:28,792 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:05:28,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:05:28,793 INFO L85 PathProgramCache]: Analyzing trace with hash 511161046, now seen corresponding path program 44 times [2022-02-16 14:05:28,793 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:05:28,793 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535844795] [2022-02-16 14:05:28,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:05:28,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:05:28,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:05:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:33,380 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:05:33,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535844795] [2022-02-16 14:05:33,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535844795] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:05:33,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312702306] [2022-02-16 14:05:33,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:05:33,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:05:33,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:05:33,381 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 14:05:33,383 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 14:05:33,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:05:33,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:05:33,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:05:33,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:05:34,239 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:34,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:05:37,263 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:37,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312702306] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:05:37,263 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:05:37,263 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:05:37,263 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637805942] [2022-02-16 14:05:37,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:05:37,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:05:37,263 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:05:37,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:05:37,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=791, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:05:37,264 INFO L87 Difference]: Start difference. First operand 7329 states and 14001 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:45,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:05:45,380 INFO L93 Difference]: Finished difference Result 8869 states and 16762 transitions. [2022-02-16 14:05:45,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-16 14:05:45,380 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:05:45,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:05:45,391 INFO L225 Difference]: With dead ends: 8869 [2022-02-16 14:05:45,392 INFO L226 Difference]: Without dead ends: 8796 [2022-02-16 14:05:45,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1840, Invalid=5642, Unknown=0, NotChecked=0, Total=7482 [2022-02-16 14:05:45,393 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 466 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:05:45,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 683 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:05:45,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8796 states. [2022-02-16 14:05:45,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8796 to 7656. [2022-02-16 14:05:45,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7656 states, 7655 states have (on average 1.9093403004572176) internal successors, (14616), 7655 states have internal predecessors, (14616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:45,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7656 states to 7656 states and 14616 transitions. [2022-02-16 14:05:45,513 INFO L78 Accepts]: Start accepts. Automaton has 7656 states and 14616 transitions. Word has length 32 [2022-02-16 14:05:45,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:05:45,514 INFO L470 AbstractCegarLoop]: Abstraction has 7656 states and 14616 transitions. [2022-02-16 14:05:45,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:45,514 INFO L276 IsEmpty]: Start isEmpty. Operand 7656 states and 14616 transitions. [2022-02-16 14:05:45,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:05:45,522 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:05:45,522 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:05:45,537 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 14:05:45,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:05:45,722 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:05:45,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:05:45,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1594442486, now seen corresponding path program 45 times [2022-02-16 14:05:45,723 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:05:45,723 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176755898] [2022-02-16 14:05:45,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:05:45,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:05:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:05:45,940 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:45,940 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:05:45,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176755898] [2022-02-16 14:05:45,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176755898] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:05:45,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990295025] [2022-02-16 14:05:45,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:05:45,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:05:45,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:05:45,943 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 14:05:45,963 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 14:05:45,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-16 14:05:45,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:05:45,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:05:45,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:05:46,765 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:46,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:05:49,905 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:49,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990295025] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:05:49,906 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:05:49,906 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:05:49,906 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893703256] [2022-02-16 14:05:49,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:05:49,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:05:49,906 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:05:49,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:05:49,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:05:49,907 INFO L87 Difference]: Start difference. First operand 7656 states and 14616 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:56,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:05:56,485 INFO L93 Difference]: Finished difference Result 8731 states and 16540 transitions. [2022-02-16 14:05:56,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-16 14:05:56,485 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:05:56,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:05:56,496 INFO L225 Difference]: With dead ends: 8731 [2022-02-16 14:05:56,496 INFO L226 Difference]: Without dead ends: 8677 [2022-02-16 14:05:56,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1590, Invalid=5052, Unknown=0, NotChecked=0, Total=6642 [2022-02-16 14:05:56,497 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 279 mSDsluCounter, 1574 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-16 14:05:56,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 1095 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1128 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-16 14:05:56,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8677 states. [2022-02-16 14:05:56,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8677 to 8016. [2022-02-16 14:05:56,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8016 states, 8015 states have (on average 1.9065502183406113) internal successors, (15281), 8015 states have internal predecessors, (15281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:56,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8016 states to 8016 states and 15281 transitions. [2022-02-16 14:05:56,592 INFO L78 Accepts]: Start accepts. Automaton has 8016 states and 15281 transitions. Word has length 32 [2022-02-16 14:05:56,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:05:56,592 INFO L470 AbstractCegarLoop]: Abstraction has 8016 states and 15281 transitions. [2022-02-16 14:05:56,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:05:56,593 INFO L276 IsEmpty]: Start isEmpty. Operand 8016 states and 15281 transitions. [2022-02-16 14:05:56,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:05:56,600 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:05:56,600 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:05:56,616 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 14:05:56,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-02-16 14:05:56,801 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:05:56,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:05:56,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1645415210, now seen corresponding path program 46 times [2022-02-16 14:05:56,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:05:56,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892746430] [2022-02-16 14:05:56,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:05:56,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:05:56,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:05:57,611 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:57,611 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:05:57,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892746430] [2022-02-16 14:05:57,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892746430] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:05:57,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013308638] [2022-02-16 14:05:57,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:05:57,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:05:57,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:05:57,613 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 14:05:57,613 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 14:05:57,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:05:57,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:05:57,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:05:57,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:05:58,317 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:05:58,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:01,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013308638] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:01,036 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:01,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:06:01,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831739024] [2022-02-16 14:06:01,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:01,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:06:01,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:01,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:06:01,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=787, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:06:01,037 INFO L87 Difference]: Start difference. First operand 8016 states and 15281 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:09,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:09,191 INFO L93 Difference]: Finished difference Result 9539 states and 18090 transitions. [2022-02-16 14:06:09,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-16 14:06:09,192 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:06:09,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:09,201 INFO L225 Difference]: With dead ends: 9539 [2022-02-16 14:06:09,201 INFO L226 Difference]: Without dead ends: 9474 [2022-02-16 14:06:09,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2948 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=2050, Invalid=6140, Unknown=0, NotChecked=0, Total=8190 [2022-02-16 14:06:09,202 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 302 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:09,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 879 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 14:06:09,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9474 states. [2022-02-16 14:06:09,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9474 to 8483. [2022-02-16 14:06:09,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8483 states, 8482 states have (on average 1.9055647253006367) internal successors, (16163), 8482 states have internal predecessors, (16163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:09,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8483 states to 8483 states and 16163 transitions. [2022-02-16 14:06:09,329 INFO L78 Accepts]: Start accepts. Automaton has 8483 states and 16163 transitions. Word has length 32 [2022-02-16 14:06:09,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:09,329 INFO L470 AbstractCegarLoop]: Abstraction has 8483 states and 16163 transitions. [2022-02-16 14:06:09,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:09,329 INFO L276 IsEmpty]: Start isEmpty. Operand 8483 states and 16163 transitions. [2022-02-16 14:06:09,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:06:09,338 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:09,338 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:09,354 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 14:06:09,538 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,SelfDestructingSolverStorable52 [2022-02-16 14:06:09,538 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:09,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:09,539 INFO L85 PathProgramCache]: Analyzing trace with hash 660903510, now seen corresponding path program 47 times [2022-02-16 14:06:09,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:09,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917103220] [2022-02-16 14:06:09,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:09,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:09,882 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:09,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917103220] [2022-02-16 14:06:09,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917103220] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:09,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153075471] [2022-02-16 14:06:09,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:06:09,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:09,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:09,883 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 14:06:09,891 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 14:06:09,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-16 14:06:09,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:09,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:06:09,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:10,537 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:10,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:12,862 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:12,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153075471] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:12,862 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:12,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:06:12,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664648187] [2022-02-16 14:06:12,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:12,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:06:12,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:12,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:06:12,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=777, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:06:12,863 INFO L87 Difference]: Start difference. First operand 8483 states and 16163 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:17,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:17,071 INFO L93 Difference]: Finished difference Result 9315 states and 17602 transitions. [2022-02-16 14:06:17,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-16 14:06:17,071 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:06:17,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:17,084 INFO L225 Difference]: With dead ends: 9315 [2022-02-16 14:06:17,084 INFO L226 Difference]: Without dead ends: 9246 [2022-02-16 14:06:17,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1555, Invalid=5087, Unknown=0, NotChecked=0, Total=6642 [2022-02-16 14:06:17,085 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 281 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:17,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 517 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:06:17,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9246 states. [2022-02-16 14:06:17,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9246 to 8688. [2022-02-16 14:06:17,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8688 states, 8687 states have (on average 1.9060665362035225) internal successors, (16558), 8687 states have internal predecessors, (16558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:17,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8688 states to 8688 states and 16558 transitions. [2022-02-16 14:06:17,201 INFO L78 Accepts]: Start accepts. Automaton has 8688 states and 16558 transitions. Word has length 32 [2022-02-16 14:06:17,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:17,201 INFO L470 AbstractCegarLoop]: Abstraction has 8688 states and 16558 transitions. [2022-02-16 14:06:17,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:17,202 INFO L276 IsEmpty]: Start isEmpty. Operand 8688 states and 16558 transitions. [2022-02-16 14:06:17,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:06:17,210 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:17,210 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:17,226 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 14:06:17,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:17,411 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:17,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:17,411 INFO L85 PathProgramCache]: Analyzing trace with hash 104821966, now seen corresponding path program 48 times [2022-02-16 14:06:17,411 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:17,411 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403100189] [2022-02-16 14:06:17,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:17,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:17,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:19,164 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:19,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403100189] [2022-02-16 14:06:19,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403100189] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:19,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011375284] [2022-02-16 14:06:19,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:06:19,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:19,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:19,165 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 14:06:19,166 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 14:06:19,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 14:06:19,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:19,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:06:19,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:19,978 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:19,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:22,620 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:22,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011375284] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:22,621 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:22,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:06:22,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810752066] [2022-02-16 14:06:22,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:22,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:06:22,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:22,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:06:22,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:06:22,622 INFO L87 Difference]: Start difference. First operand 8688 states and 16558 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:30,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:30,840 INFO L93 Difference]: Finished difference Result 10208 states and 19220 transitions. [2022-02-16 14:06:30,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-16 14:06:30,840 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:06:30,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:30,852 INFO L225 Difference]: With dead ends: 10208 [2022-02-16 14:06:30,852 INFO L226 Difference]: Without dead ends: 10101 [2022-02-16 14:06:30,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4189 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=2553, Invalid=8159, Unknown=0, NotChecked=0, Total=10712 [2022-02-16 14:06:30,854 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 362 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:30,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 845 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 14:06:30,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10101 states. [2022-02-16 14:06:30,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10101 to 9160. [2022-02-16 14:06:30,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9160 states, 9159 states have (on average 1.9068675619609128) internal successors, (17465), 9159 states have internal predecessors, (17465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:30,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9160 states to 9160 states and 17465 transitions. [2022-02-16 14:06:30,993 INFO L78 Accepts]: Start accepts. Automaton has 9160 states and 17465 transitions. Word has length 32 [2022-02-16 14:06:30,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:30,993 INFO L470 AbstractCegarLoop]: Abstraction has 9160 states and 17465 transitions. [2022-02-16 14:06:30,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:30,994 INFO L276 IsEmpty]: Start isEmpty. Operand 9160 states and 17465 transitions. [2022-02-16 14:06:31,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:06:31,003 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:31,003 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:31,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:31,204 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,SelfDestructingSolverStorable54 [2022-02-16 14:06:31,204 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:31,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:31,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1378901494, now seen corresponding path program 49 times [2022-02-16 14:06:31,204 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:31,204 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304547167] [2022-02-16 14:06:31,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:31,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:31,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:32,953 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:32,953 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:32,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304547167] [2022-02-16 14:06:32,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304547167] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:32,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181737975] [2022-02-16 14:06:32,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:06:32,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:32,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:32,955 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 14:06:32,956 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 14:06:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:32,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:06:32,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:33,776 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:33,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:36,632 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:36,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181737975] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:36,632 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:36,632 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:06:36,632 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442854619] [2022-02-16 14:06:36,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:36,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:06:36,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:36,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:06:36,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=796, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:06:36,633 INFO L87 Difference]: Start difference. First operand 9160 states and 17465 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:45,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:45,152 INFO L93 Difference]: Finished difference Result 10310 states and 19477 transitions. [2022-02-16 14:06:45,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-16 14:06:45,153 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:06:45,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:45,166 INFO L225 Difference]: With dead ends: 10310 [2022-02-16 14:06:45,166 INFO L226 Difference]: Without dead ends: 10227 [2022-02-16 14:06:45,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3268 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=2087, Invalid=7033, Unknown=0, NotChecked=0, Total=9120 [2022-02-16 14:06:45,167 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 365 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:45,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 837 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 14:06:45,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10227 states. [2022-02-16 14:06:45,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10227 to 9483. [2022-02-16 14:06:45,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9483 states, 9482 states have (on average 1.9033959080362792) internal successors, (18048), 9482 states have internal predecessors, (18048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:45,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9483 states to 9483 states and 18048 transitions. [2022-02-16 14:06:45,291 INFO L78 Accepts]: Start accepts. Automaton has 9483 states and 18048 transitions. Word has length 32 [2022-02-16 14:06:45,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:45,291 INFO L470 AbstractCegarLoop]: Abstraction has 9483 states and 18048 transitions. [2022-02-16 14:06:45,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:45,291 INFO L276 IsEmpty]: Start isEmpty. Operand 9483 states and 18048 transitions. [2022-02-16 14:06:45,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:06:45,301 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:45,301 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:45,316 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 14:06:45,501 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,SelfDestructingSolverStorable55 [2022-02-16 14:06:45,501 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:45,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:45,501 INFO L85 PathProgramCache]: Analyzing trace with hash -666283194, now seen corresponding path program 50 times [2022-02-16 14:06:45,502 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:45,502 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799495921] [2022-02-16 14:06:45,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:45,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:45,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:46,021 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:46,021 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:46,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799495921] [2022-02-16 14:06:46,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799495921] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:46,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225700736] [2022-02-16 14:06:46,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:06:46,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:46,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:46,022 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 14:06:46,023 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 14:06:46,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:06:46,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:46,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:06:46,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:46,640 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:46,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:48,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225700736] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:48,934 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:48,934 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:06:48,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039638152] [2022-02-16 14:06:48,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:48,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:06:48,934 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:48,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:06:48,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:06:48,935 INFO L87 Difference]: Start difference. First operand 9483 states and 18048 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:55,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:55,555 INFO L93 Difference]: Finished difference Result 10082 states and 19107 transitions. [2022-02-16 14:06:55,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-16 14:06:55,556 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:06:55,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:55,565 INFO L225 Difference]: With dead ends: 10082 [2022-02-16 14:06:55,565 INFO L226 Difference]: Without dead ends: 10059 [2022-02-16 14:06:55,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1582, Invalid=5060, Unknown=0, NotChecked=0, Total=6642 [2022-02-16 14:06:55,566 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 335 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:55,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 827 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:06:55,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10059 states. [2022-02-16 14:06:55,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10059 to 9653. [2022-02-16 14:06:55,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9653 states, 9652 states have (on average 1.9017820140903439) internal successors, (18356), 9652 states have internal predecessors, (18356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:55,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9653 states to 9653 states and 18356 transitions. [2022-02-16 14:06:55,688 INFO L78 Accepts]: Start accepts. Automaton has 9653 states and 18356 transitions. Word has length 32 [2022-02-16 14:06:55,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:55,688 INFO L470 AbstractCegarLoop]: Abstraction has 9653 states and 18356 transitions. [2022-02-16 14:06:55,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:55,688 INFO L276 IsEmpty]: Start isEmpty. Operand 9653 states and 18356 transitions. [2022-02-16 14:06:55,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:06:55,697 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:55,698 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:55,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:55,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:55,898 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:55,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:55,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1945194966, now seen corresponding path program 51 times [2022-02-16 14:06:55,898 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:55,898 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139237065] [2022-02-16 14:06:55,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:55,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:56,246 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:56,247 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:56,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139237065] [2022-02-16 14:06:56,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139237065] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:56,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073618689] [2022-02-16 14:06:56,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:06:56,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:56,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:56,248 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 14:06:56,277 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 14:06:56,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-02-16 14:06:56,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:56,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:06:56,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:56,964 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:56,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:59,808 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:59,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073618689] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:59,809 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:59,809 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:06:59,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111727973] [2022-02-16 14:06:59,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:59,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:06:59,809 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:59,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:06:59,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=796, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:06:59,810 INFO L87 Difference]: Start difference. First operand 9653 states and 18356 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:06,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:06,207 INFO L93 Difference]: Finished difference Result 10471 states and 19783 transitions. [2022-02-16 14:07:06,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-16 14:07:06,208 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:07:06,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:06,221 INFO L225 Difference]: With dead ends: 10471 [2022-02-16 14:07:06,221 INFO L226 Difference]: Without dead ends: 10429 [2022-02-16 14:07:06,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2262 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1593, Invalid=5213, Unknown=0, NotChecked=0, Total=6806 [2022-02-16 14:07:06,222 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 303 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:06,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 883 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 14:07:06,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10429 states. [2022-02-16 14:07:06,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10429 to 9898. [2022-02-16 14:07:06,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9898 states, 9897 states have (on average 1.9081539860563808) internal successors, (18885), 9897 states have internal predecessors, (18885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:06,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9898 states to 9898 states and 18885 transitions. [2022-02-16 14:07:06,397 INFO L78 Accepts]: Start accepts. Automaton has 9898 states and 18885 transitions. Word has length 32 [2022-02-16 14:07:06,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:06,398 INFO L470 AbstractCegarLoop]: Abstraction has 9898 states and 18885 transitions. [2022-02-16 14:07:06,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:06,398 INFO L276 IsEmpty]: Start isEmpty. Operand 9898 states and 18885 transitions. [2022-02-16 14:07:06,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:07:06,409 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:06,409 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:06,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-02-16 14:07:06,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:06,609 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:06,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:06,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1588989098, now seen corresponding path program 52 times [2022-02-16 14:07:06,610 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:06,610 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209323889] [2022-02-16 14:07:06,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:06,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:06,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:06,833 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:06,833 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:06,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209323889] [2022-02-16 14:07:06,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209323889] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:06,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713428090] [2022-02-16 14:07:06,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:07:06,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:06,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:06,834 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 14:07:06,835 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 14:07:06,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:07:06,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:06,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:07:06,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:07,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:10,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713428090] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:10,334 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:10,334 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:07:10,334 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532891900] [2022-02-16 14:07:10,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:10,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:07:10,334 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:10,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:07:10,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=800, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:07:10,335 INFO L87 Difference]: Start difference. First operand 9898 states and 18885 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:18,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:18,123 INFO L93 Difference]: Finished difference Result 10891 states and 20629 transitions. [2022-02-16 14:07:18,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-16 14:07:18,124 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:07:18,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:18,137 INFO L225 Difference]: With dead ends: 10891 [2022-02-16 14:07:18,137 INFO L226 Difference]: Without dead ends: 10836 [2022-02-16 14:07:18,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2859 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1797, Invalid=6575, Unknown=0, NotChecked=0, Total=8372 [2022-02-16 14:07:18,138 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 297 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:18,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 457 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:07:18,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10836 states. [2022-02-16 14:07:18,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10836 to 10183. [2022-02-16 14:07:18,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10183 states, 10182 states have (on average 1.915046159890002) internal successors, (19499), 10182 states have internal predecessors, (19499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:18,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10183 states to 10183 states and 19499 transitions. [2022-02-16 14:07:18,298 INFO L78 Accepts]: Start accepts. Automaton has 10183 states and 19499 transitions. Word has length 32 [2022-02-16 14:07:18,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:18,299 INFO L470 AbstractCegarLoop]: Abstraction has 10183 states and 19499 transitions. [2022-02-16 14:07:18,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:18,299 INFO L276 IsEmpty]: Start isEmpty. Operand 10183 states and 19499 transitions. [2022-02-16 14:07:18,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:07:18,309 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:18,309 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:18,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-02-16 14:07:18,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:18,510 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:18,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:18,510 INFO L85 PathProgramCache]: Analyzing trace with hash -66800426, now seen corresponding path program 53 times [2022-02-16 14:07:18,510 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:18,510 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184948050] [2022-02-16 14:07:18,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:18,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:18,752 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:18,752 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:18,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184948050] [2022-02-16 14:07:18,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184948050] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:18,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028224391] [2022-02-16 14:07:18,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:07:18,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:18,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:18,755 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 14:07:18,755 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 14:07:18,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-16 14:07:18,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:18,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-16 14:07:18,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:19,498 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:19,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:22,332 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:22,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028224391] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:22,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:22,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:07:22,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569226091] [2022-02-16 14:07:22,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:22,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:07:22,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:22,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:07:22,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:07:22,334 INFO L87 Difference]: Start difference. First operand 10183 states and 19499 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:29,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:29,833 INFO L93 Difference]: Finished difference Result 11485 states and 21862 transitions. [2022-02-16 14:07:29,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-16 14:07:29,834 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:07:29,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:29,848 INFO L225 Difference]: With dead ends: 11485 [2022-02-16 14:07:29,848 INFO L226 Difference]: Without dead ends: 11415 [2022-02-16 14:07:29,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2698 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1826, Invalid=5484, Unknown=0, NotChecked=0, Total=7310 [2022-02-16 14:07:29,849 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 475 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:29,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 325 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:07:29,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11415 states. [2022-02-16 14:07:30,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11415 to 10520. [2022-02-16 14:07:30,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10520 states, 10519 states have (on average 1.9199543682859588) internal successors, (20196), 10519 states have internal predecessors, (20196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:30,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10520 states to 10520 states and 20196 transitions. [2022-02-16 14:07:30,034 INFO L78 Accepts]: Start accepts. Automaton has 10520 states and 20196 transitions. Word has length 32 [2022-02-16 14:07:30,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:30,034 INFO L470 AbstractCegarLoop]: Abstraction has 10520 states and 20196 transitions. [2022-02-16 14:07:30,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:30,034 INFO L276 IsEmpty]: Start isEmpty. Operand 10520 states and 20196 transitions. [2022-02-16 14:07:30,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:07:30,044 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:30,044 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:30,061 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 14:07:30,249 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,SelfDestructingSolverStorable59 [2022-02-16 14:07:30,249 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:30,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:30,250 INFO L85 PathProgramCache]: Analyzing trace with hash -2003508590, now seen corresponding path program 54 times [2022-02-16 14:07:30,250 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:30,250 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810190391] [2022-02-16 14:07:30,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:30,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:30,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:30,503 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:30,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810190391] [2022-02-16 14:07:30,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810190391] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:30,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057856855] [2022-02-16 14:07:30,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:07:30,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:30,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:30,504 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 14:07:30,533 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 14:07:30,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 14:07:30,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:30,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:07:30,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:31,302 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:31,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:33,886 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:33,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057856855] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:33,886 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:33,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:07:33,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879104332] [2022-02-16 14:07:33,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:33,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:07:33,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:33,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:07:33,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:07:33,887 INFO L87 Difference]: Start difference. First operand 10520 states and 20196 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:41,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:41,127 INFO L93 Difference]: Finished difference Result 11942 states and 22761 transitions. [2022-02-16 14:07:41,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-16 14:07:41,127 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:07:41,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:41,142 INFO L225 Difference]: With dead ends: 11942 [2022-02-16 14:07:41,142 INFO L226 Difference]: Without dead ends: 11862 [2022-02-16 14:07:41,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3877 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=2391, Invalid=7709, Unknown=0, NotChecked=0, Total=10100 [2022-02-16 14:07:41,143 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 342 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:41,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 719 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 14:07:41,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11862 states. [2022-02-16 14:07:41,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11862 to 10923. [2022-02-16 14:07:41,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10923 states, 10922 states have (on average 1.9123786852224867) internal successors, (20887), 10922 states have internal predecessors, (20887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:41,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10923 states to 10923 states and 20887 transitions. [2022-02-16 14:07:41,298 INFO L78 Accepts]: Start accepts. Automaton has 10923 states and 20887 transitions. Word has length 32 [2022-02-16 14:07:41,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:41,298 INFO L470 AbstractCegarLoop]: Abstraction has 10923 states and 20887 transitions. [2022-02-16 14:07:41,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:41,298 INFO L276 IsEmpty]: Start isEmpty. Operand 10923 states and 20887 transitions. [2022-02-16 14:07:41,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:07:41,310 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:41,310 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:41,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-02-16 14:07:41,511 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,SelfDestructingSolverStorable60 [2022-02-16 14:07:41,511 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:41,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:41,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1953121170, now seen corresponding path program 55 times [2022-02-16 14:07:41,511 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:41,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694245976] [2022-02-16 14:07:41,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:41,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:41,837 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:41,837 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:41,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694245976] [2022-02-16 14:07:41,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694245976] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:41,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962590160] [2022-02-16 14:07:41,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:07:41,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:41,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:41,840 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 14:07:41,865 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 14:07:41,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:41,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:07:41,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:42,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:45,038 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:45,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962590160] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:45,038 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:45,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:07:45,038 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519135634] [2022-02-16 14:07:45,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:45,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:07:45,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:45,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:07:45,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:07:45,039 INFO L87 Difference]: Start difference. First operand 10923 states and 20887 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:51,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:51,074 INFO L93 Difference]: Finished difference Result 12227 states and 23247 transitions. [2022-02-16 14:07:51,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-16 14:07:51,074 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:07:51,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:51,090 INFO L225 Difference]: With dead ends: 12227 [2022-02-16 14:07:51,090 INFO L226 Difference]: Without dead ends: 12156 [2022-02-16 14:07:51,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3071 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1854, Invalid=6336, Unknown=0, NotChecked=0, Total=8190 [2022-02-16 14:07:51,091 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 254 mSDsluCounter, 1142 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:51,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 793 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 14:07:51,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12156 states. [2022-02-16 14:07:51,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12156 to 11219. [2022-02-16 14:07:51,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11219 states, 11218 states have (on average 1.909966125869139) internal successors, (21426), 11218 states have internal predecessors, (21426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:51,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11219 states to 11219 states and 21426 transitions. [2022-02-16 14:07:51,249 INFO L78 Accepts]: Start accepts. Automaton has 11219 states and 21426 transitions. Word has length 32 [2022-02-16 14:07:51,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:51,249 INFO L470 AbstractCegarLoop]: Abstraction has 11219 states and 21426 transitions. [2022-02-16 14:07:51,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:51,249 INFO L276 IsEmpty]: Start isEmpty. Operand 11219 states and 21426 transitions. [2022-02-16 14:07:51,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:07:51,261 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:51,261 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:51,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-02-16 14:07:51,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-02-16 14:07:51,461 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:51,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:51,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1263225002, now seen corresponding path program 56 times [2022-02-16 14:07:51,462 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:51,462 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846575901] [2022-02-16 14:07:51,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:51,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:51,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:51,685 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:51,686 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:51,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846575901] [2022-02-16 14:07:51,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846575901] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:51,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908646872] [2022-02-16 14:07:51,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:07:51,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:51,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:51,687 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 14:07:51,715 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 14:07:51,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:07:51,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:51,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:07:51,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:52,390 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:52,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:54,983 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:54,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908646872] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:54,984 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:54,984 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:07:54,984 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244046088] [2022-02-16 14:07:54,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:54,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:07:54,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:54,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:07:54,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=805, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:07:54,984 INFO L87 Difference]: Start difference. First operand 11219 states and 21426 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:03,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:03,461 INFO L93 Difference]: Finished difference Result 12372 states and 23435 transitions. [2022-02-16 14:08:03,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-16 14:08:03,462 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:08:03,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:03,479 INFO L225 Difference]: With dead ends: 12372 [2022-02-16 14:08:03,479 INFO L226 Difference]: Without dead ends: 12301 [2022-02-16 14:08:03,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3328 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=2316, Invalid=7190, Unknown=0, NotChecked=0, Total=9506 [2022-02-16 14:08:03,480 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 412 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:03,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 735 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 14:08:03,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12301 states. [2022-02-16 14:08:03,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12301 to 11440. [2022-02-16 14:08:03,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11440 states, 11439 states have (on average 1.9126671911880408) internal successors, (21879), 11439 states have internal predecessors, (21879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:03,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11440 states to 11440 states and 21879 transitions. [2022-02-16 14:08:03,652 INFO L78 Accepts]: Start accepts. Automaton has 11440 states and 21879 transitions. Word has length 32 [2022-02-16 14:08:03,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:03,652 INFO L470 AbstractCegarLoop]: Abstraction has 11440 states and 21879 transitions. [2022-02-16 14:08:03,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:03,652 INFO L276 IsEmpty]: Start isEmpty. Operand 11440 states and 21879 transitions. [2022-02-16 14:08:03,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:08:03,664 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:03,664 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:03,680 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 14:08:03,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:03,867 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:03,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:03,868 INFO L85 PathProgramCache]: Analyzing trace with hash -473139506, now seen corresponding path program 57 times [2022-02-16 14:08:03,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:03,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534098328] [2022-02-16 14:08:03,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:03,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:03,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:04,315 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:04,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:04,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534098328] [2022-02-16 14:08:04,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534098328] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:04,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921040103] [2022-02-16 14:08:04,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:08:04,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:04,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:04,316 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 14:08:04,317 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 14:08:04,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-02-16 14:08:04,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:08:04,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:08:04,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:05,028 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:05,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:07,806 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:07,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921040103] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:07,806 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:07,806 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:08:07,807 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334761929] [2022-02-16 14:08:07,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:07,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:08:07,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:07,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:08:07,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=810, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:08:07,807 INFO L87 Difference]: Start difference. First operand 11440 states and 21879 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:15,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:15,348 INFO L93 Difference]: Finished difference Result 13105 states and 24877 transitions. [2022-02-16 14:08:15,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-16 14:08:15,349 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:08:15,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:15,365 INFO L225 Difference]: With dead ends: 13105 [2022-02-16 14:08:15,365 INFO L226 Difference]: Without dead ends: 13023 [2022-02-16 14:08:15,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3175 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=2025, Invalid=6531, Unknown=0, NotChecked=0, Total=8556 [2022-02-16 14:08:15,366 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 314 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:15,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 699 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 14:08:15,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13023 states. [2022-02-16 14:08:15,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13023 to 11912. [2022-02-16 14:08:15,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11912 states, 11911 states have (on average 1.9115943245739233) internal successors, (22769), 11911 states have internal predecessors, (22769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:15,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11912 states to 11912 states and 22769 transitions. [2022-02-16 14:08:15,549 INFO L78 Accepts]: Start accepts. Automaton has 11912 states and 22769 transitions. Word has length 32 [2022-02-16 14:08:15,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:15,549 INFO L470 AbstractCegarLoop]: Abstraction has 11912 states and 22769 transitions. [2022-02-16 14:08:15,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:15,549 INFO L276 IsEmpty]: Start isEmpty. Operand 11912 states and 22769 transitions. [2022-02-16 14:08:15,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:08:15,562 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:15,562 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:15,578 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 14:08:15,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:15,763 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:15,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:15,764 INFO L85 PathProgramCache]: Analyzing trace with hash 2079389390, now seen corresponding path program 58 times [2022-02-16 14:08:15,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:15,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162112984] [2022-02-16 14:08:15,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:15,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:15,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:15,984 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:15,984 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:15,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162112984] [2022-02-16 14:08:15,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162112984] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:15,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428363277] [2022-02-16 14:08:15,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:08:15,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:15,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:15,988 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 14:08:16,019 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 14:08:16,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:08:16,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:08:16,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:08:16,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:16,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:19,066 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:19,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428363277] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:19,067 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:19,067 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:08:19,067 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414442211] [2022-02-16 14:08:19,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:19,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:08:19,067 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:19,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:08:19,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=784, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:08:19,068 INFO L87 Difference]: Start difference. First operand 11912 states and 22769 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:26,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:26,051 INFO L93 Difference]: Finished difference Result 13313 states and 25325 transitions. [2022-02-16 14:08:26,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-16 14:08:26,051 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:08:26,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:26,071 INFO L225 Difference]: With dead ends: 13313 [2022-02-16 14:08:26,072 INFO L226 Difference]: Without dead ends: 13232 [2022-02-16 14:08:26,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3822 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=2474, Invalid=7626, Unknown=0, NotChecked=0, Total=10100 [2022-02-16 14:08:26,073 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 378 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:26,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 761 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 14:08:26,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13232 states. [2022-02-16 14:08:26,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13232 to 12221. [2022-02-16 14:08:26,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12221 states, 12220 states have (on average 1.9089198036006547) internal successors, (23327), 12220 states have internal predecessors, (23327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:26,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12221 states to 12221 states and 23327 transitions. [2022-02-16 14:08:26,269 INFO L78 Accepts]: Start accepts. Automaton has 12221 states and 23327 transitions. Word has length 32 [2022-02-16 14:08:26,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:26,269 INFO L470 AbstractCegarLoop]: Abstraction has 12221 states and 23327 transitions. [2022-02-16 14:08:26,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:26,269 INFO L276 IsEmpty]: Start isEmpty. Operand 12221 states and 23327 transitions. [2022-02-16 14:08:26,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:08:26,282 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:26,282 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:26,298 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 14:08:26,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-02-16 14:08:26,483 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:26,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:26,484 INFO L85 PathProgramCache]: Analyzing trace with hash -703126134, now seen corresponding path program 59 times [2022-02-16 14:08:26,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:26,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774805159] [2022-02-16 14:08:26,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:26,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:27,006 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:27,007 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:27,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774805159] [2022-02-16 14:08:27,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774805159] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:27,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421843456] [2022-02-16 14:08:27,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:08:27,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:27,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:27,008 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 14:08:27,009 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 14:08:27,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-02-16 14:08:27,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:08:27,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:08:27,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:27,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:30,772 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:30,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421843456] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:30,773 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:30,773 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:08:30,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016359129] [2022-02-16 14:08:30,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:30,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:08:30,775 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:30,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:08:30,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:08:30,776 INFO L87 Difference]: Start difference. First operand 12221 states and 23327 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:40,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:40,864 INFO L93 Difference]: Finished difference Result 13711 states and 25980 transitions. [2022-02-16 14:08:40,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-16 14:08:40,865 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:08:40,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:40,884 INFO L225 Difference]: With dead ends: 13711 [2022-02-16 14:08:40,884 INFO L226 Difference]: Without dead ends: 13623 [2022-02-16 14:08:40,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4289 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=2482, Invalid=8438, Unknown=0, NotChecked=0, Total=10920 [2022-02-16 14:08:40,885 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 341 mSDsluCounter, 1486 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 1031 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:40,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 1031 Invalid, 1343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1155 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-16 14:08:40,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13623 states. [2022-02-16 14:08:41,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13623 to 12744. [2022-02-16 14:08:41,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12744 states, 12743 states have (on average 1.904418111904575) internal successors, (24268), 12743 states have internal predecessors, (24268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:41,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12744 states to 12744 states and 24268 transitions. [2022-02-16 14:08:41,096 INFO L78 Accepts]: Start accepts. Automaton has 12744 states and 24268 transitions. Word has length 32 [2022-02-16 14:08:41,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:41,096 INFO L470 AbstractCegarLoop]: Abstraction has 12744 states and 24268 transitions. [2022-02-16 14:08:41,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:41,097 INFO L276 IsEmpty]: Start isEmpty. Operand 12744 states and 24268 transitions. [2022-02-16 14:08:41,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:08:41,112 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:41,112 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:41,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-02-16 14:08:41,312 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,SelfDestructingSolverStorable65 [2022-02-16 14:08:41,313 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:41,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:41,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1515339134, now seen corresponding path program 60 times [2022-02-16 14:08:41,313 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:41,313 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939219574] [2022-02-16 14:08:41,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:41,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:42,680 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:42,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:42,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939219574] [2022-02-16 14:08:42,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939219574] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:42,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055018400] [2022-02-16 14:08:42,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:08:42,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:42,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:42,681 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 14:08:42,684 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 14:08:42,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-02-16 14:08:42,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:08:42,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:08:42,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:43,257 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:43,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:45,791 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:45,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055018400] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:45,791 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:45,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:08:45,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254482662] [2022-02-16 14:08:45,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:45,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:08:45,792 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:45,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:08:45,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:08:45,792 INFO L87 Difference]: Start difference. First operand 12744 states and 24268 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:52,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:52,431 INFO L93 Difference]: Finished difference Result 13573 states and 25659 transitions. [2022-02-16 14:08:52,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-16 14:08:52,431 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:08:52,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:52,445 INFO L225 Difference]: With dead ends: 13573 [2022-02-16 14:08:52,446 INFO L226 Difference]: Without dead ends: 13512 [2022-02-16 14:08:52,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3194 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2151, Invalid=6221, Unknown=0, NotChecked=0, Total=8372 [2022-02-16 14:08:52,446 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 298 mSDsluCounter, 967 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:52,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 699 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-16 14:08:52,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13512 states. [2022-02-16 14:08:52,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13512 to 12932. [2022-02-16 14:08:52,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12932 states, 12931 states have (on average 1.9013997370659654) internal successors, (24587), 12931 states have internal predecessors, (24587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:52,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12932 states to 12932 states and 24587 transitions. [2022-02-16 14:08:52,626 INFO L78 Accepts]: Start accepts. Automaton has 12932 states and 24587 transitions. Word has length 32 [2022-02-16 14:08:52,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:52,626 INFO L470 AbstractCegarLoop]: Abstraction has 12932 states and 24587 transitions. [2022-02-16 14:08:52,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:52,626 INFO L276 IsEmpty]: Start isEmpty. Operand 12932 states and 24587 transitions. [2022-02-16 14:08:52,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:08:52,642 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:52,642 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:52,658 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 14:08:52,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:52,842 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:52,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:52,843 INFO L85 PathProgramCache]: Analyzing trace with hash 553077010, now seen corresponding path program 61 times [2022-02-16 14:08:52,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:52,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862796248] [2022-02-16 14:08:52,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:52,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:52,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:53,011 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:53,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862796248] [2022-02-16 14:08:53,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862796248] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:53,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621303090] [2022-02-16 14:08:53,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:08:53,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:53,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:53,013 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 14:08:53,033 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 14:08:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:53,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:08:53,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:53,774 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:53,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:56,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621303090] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:56,797 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:56,797 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:08:56,797 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218892175] [2022-02-16 14:08:56,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:56,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:08:56,797 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:56,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:08:56,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:08:56,798 INFO L87 Difference]: Start difference. First operand 12932 states and 24587 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:02,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:09:02,309 INFO L93 Difference]: Finished difference Result 13823 states and 26116 transitions. [2022-02-16 14:09:02,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-16 14:09:02,309 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:09:02,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:09:02,329 INFO L225 Difference]: With dead ends: 13823 [2022-02-16 14:09:02,329 INFO L226 Difference]: Without dead ends: 13772 [2022-02-16 14:09:02,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3386 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2122, Invalid=6998, Unknown=0, NotChecked=0, Total=9120 [2022-02-16 14:09:02,330 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 303 mSDsluCounter, 1108 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:09:02,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 785 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 14:09:02,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13772 states. [2022-02-16 14:09:02,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13772 to 13119. [2022-02-16 14:09:02,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13119 states, 13118 states have (on average 1.9055496264674494) internal successors, (24997), 13118 states have internal predecessors, (24997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:02,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13119 states to 13119 states and 24997 transitions. [2022-02-16 14:09:02,562 INFO L78 Accepts]: Start accepts. Automaton has 13119 states and 24997 transitions. Word has length 32 [2022-02-16 14:09:02,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:09:02,562 INFO L470 AbstractCegarLoop]: Abstraction has 13119 states and 24997 transitions. [2022-02-16 14:09:02,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:02,563 INFO L276 IsEmpty]: Start isEmpty. Operand 13119 states and 24997 transitions. [2022-02-16 14:09:02,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:09:02,608 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:09:02,608 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:09:02,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-02-16 14:09:02,809 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,SelfDestructingSolverStorable67 [2022-02-16 14:09:02,809 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:09:02,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:09:02,809 INFO L85 PathProgramCache]: Analyzing trace with hash 899340750, now seen corresponding path program 62 times [2022-02-16 14:09:02,809 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:09:02,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728336209] [2022-02-16 14:09:02,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:09:02,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:09:02,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:09:09,278 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:09,278 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:09:09,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728336209] [2022-02-16 14:09:09,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728336209] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:09:09,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967969070] [2022-02-16 14:09:09,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:09:09,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:09,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:09:09,280 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 14:09:09,280 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 14:09:09,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:09:09,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:09:09,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:09:09,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:09:09,849 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:09,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:09:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:12,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967969070] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:09:12,113 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:09:12,113 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:09:12,113 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584666452] [2022-02-16 14:09:12,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:09:12,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:09:12,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:09:12,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:09:12,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=778, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:09:12,114 INFO L87 Difference]: Start difference. First operand 13119 states and 24997 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:15,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:09:15,766 INFO L93 Difference]: Finished difference Result 13815 states and 26262 transitions. [2022-02-16 14:09:15,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-16 14:09:15,766 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:09:15,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:09:15,784 INFO L225 Difference]: With dead ends: 13815 [2022-02-16 14:09:15,784 INFO L226 Difference]: Without dead ends: 13762 [2022-02-16 14:09:15,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2813 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1928, Invalid=6082, Unknown=0, NotChecked=0, Total=8010 [2022-02-16 14:09:15,785 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 299 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:09:15,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 323 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:09:15,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13762 states. [2022-02-16 14:09:15,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13762 to 13220. [2022-02-16 14:09:15,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13220 states, 13219 states have (on average 1.906573870943339) internal successors, (25203), 13219 states have internal predecessors, (25203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:15,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13220 states to 13220 states and 25203 transitions. [2022-02-16 14:09:15,993 INFO L78 Accepts]: Start accepts. Automaton has 13220 states and 25203 transitions. Word has length 32 [2022-02-16 14:09:15,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:09:15,993 INFO L470 AbstractCegarLoop]: Abstraction has 13220 states and 25203 transitions. [2022-02-16 14:09:15,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:15,994 INFO L276 IsEmpty]: Start isEmpty. Operand 13220 states and 25203 transitions. [2022-02-16 14:09:16,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:09:16,010 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:09:16,010 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:09:16,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-02-16 14:09:16,210 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,SelfDestructingSolverStorable68 [2022-02-16 14:09:16,211 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:09:16,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:09:16,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1087031050, now seen corresponding path program 63 times [2022-02-16 14:09:16,211 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:09:16,211 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118921302] [2022-02-16 14:09:16,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:09:16,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:09:16,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:09:16,503 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:16,503 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:09:16,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118921302] [2022-02-16 14:09:16,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118921302] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:09:16,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110426443] [2022-02-16 14:09:16,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:09:16,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:16,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:09:16,505 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 14:09:16,507 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 14:09:16,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-16 14:09:16,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:09:16,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:09:16,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:09:17,327 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:17,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:09:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:20,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110426443] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:09:20,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:09:20,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:09:20,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906011598] [2022-02-16 14:09:20,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:09:20,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:09:20,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:09:20,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:09:20,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:09:20,451 INFO L87 Difference]: Start difference. First operand 13220 states and 25203 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:30,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:09:30,014 INFO L93 Difference]: Finished difference Result 14204 states and 26915 transitions. [2022-02-16 14:09:30,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-16 14:09:30,015 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:09:30,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:09:30,035 INFO L225 Difference]: With dead ends: 14204 [2022-02-16 14:09:30,035 INFO L226 Difference]: Without dead ends: 14162 [2022-02-16 14:09:30,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3712 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=2370, Invalid=7932, Unknown=0, NotChecked=0, Total=10302 [2022-02-16 14:09:30,037 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 405 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-16 14:09:30,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 767 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-16 14:09:30,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14162 states. [2022-02-16 14:09:30,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14162 to 13483. [2022-02-16 14:09:30,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13483 states, 13482 states have (on average 1.909286456015428) internal successors, (25741), 13482 states have internal predecessors, (25741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:30,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13483 states to 13483 states and 25741 transitions. [2022-02-16 14:09:30,266 INFO L78 Accepts]: Start accepts. Automaton has 13483 states and 25741 transitions. Word has length 32 [2022-02-16 14:09:30,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:09:30,266 INFO L470 AbstractCegarLoop]: Abstraction has 13483 states and 25741 transitions. [2022-02-16 14:09:30,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:30,266 INFO L276 IsEmpty]: Start isEmpty. Operand 13483 states and 25741 transitions. [2022-02-16 14:09:30,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:09:30,283 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:09:30,283 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:09:30,298 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 14:09:30,483 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,SelfDestructingSolverStorable69 [2022-02-16 14:09:30,484 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:09:30,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:09:30,484 INFO L85 PathProgramCache]: Analyzing trace with hash 524506950, now seen corresponding path program 64 times [2022-02-16 14:09:30,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:09:30,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434843325] [2022-02-16 14:09:30,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:09:30,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:09:30,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:09:30,689 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:30,689 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:09:30,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434843325] [2022-02-16 14:09:30,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434843325] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:09:30,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374510628] [2022-02-16 14:09:30,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:09:30,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:30,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:09:30,691 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 14:09:30,691 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 14:09:30,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:09:30,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:09:30,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:09:30,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:09:31,299 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:31,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:09:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:34,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374510628] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:09:34,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:09:34,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-16 14:09:34,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928791415] [2022-02-16 14:09:34,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:09:34,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-16 14:09:34,019 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:09:34,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-16 14:09:34,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=791, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:09:34,019 INFO L87 Difference]: Start difference. First operand 13483 states and 25741 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:44,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:09:44,370 INFO L93 Difference]: Finished difference Result 14644 states and 27793 transitions. [2022-02-16 14:09:44,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-02-16 14:09:44,370 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:09:44,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:09:44,390 INFO L225 Difference]: With dead ends: 14644 [2022-02-16 14:09:44,390 INFO L226 Difference]: Without dead ends: 14582 [2022-02-16 14:09:44,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5769 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=3294, Invalid=11226, Unknown=0, NotChecked=0, Total=14520 [2022-02-16 14:09:44,392 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 306 mSDsluCounter, 1284 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-16 14:09:44,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 895 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-16 14:09:44,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14582 states. [2022-02-16 14:09:44,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14582 to 13744. [2022-02-16 14:09:44,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13744 states, 13743 states have (on average 1.9101360692716292) internal successors, (26251), 13743 states have internal predecessors, (26251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:44,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13744 states to 13744 states and 26251 transitions. [2022-02-16 14:09:44,603 INFO L78 Accepts]: Start accepts. Automaton has 13744 states and 26251 transitions. Word has length 32 [2022-02-16 14:09:44,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:09:44,603 INFO L470 AbstractCegarLoop]: Abstraction has 13744 states and 26251 transitions. [2022-02-16 14:09:44,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:44,603 INFO L276 IsEmpty]: Start isEmpty. Operand 13744 states and 26251 transitions. [2022-02-16 14:09:44,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:09:44,620 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:09:44,620 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:09:44,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-02-16 14:09:44,821 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,SelfDestructingSolverStorable70 [2022-02-16 14:09:44,821 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:09:44,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:09:44,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1989948254, now seen corresponding path program 3 times [2022-02-16 14:09:44,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:09:44,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223708145] [2022-02-16 14:09:44,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:09:44,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:09:44,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:09:59,090 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:59,090 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:09:59,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223708145] [2022-02-16 14:09:59,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223708145] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:09:59,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575823044] [2022-02-16 14:09:59,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:09:59,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:59,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:09:59,091 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 14:09:59,092 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 14:09:59,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-02-16 14:09:59,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:09:59,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:09:59,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:09:59,571 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:59,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:10:00,475 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:00,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575823044] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:10:00,475 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:10:00,475 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-02-16 14:10:00,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844915646] [2022-02-16 14:10:00,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:10:00,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-16 14:10:00,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:10:00,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-16 14:10:00,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2022-02-16 14:10:00,476 INFO L87 Difference]: Start difference. First operand 13744 states and 26251 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:02,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:10:02,200 INFO L93 Difference]: Finished difference Result 14095 states and 26786 transitions. [2022-02-16 14:10:02,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-16 14:10:02,200 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:10:02,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:10:02,219 INFO L225 Difference]: With dead ends: 14095 [2022-02-16 14:10:02,219 INFO L226 Difference]: Without dead ends: 14016 [2022-02-16 14:10:02,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1104, Invalid=3186, Unknown=0, NotChecked=0, Total=4290 [2022-02-16 14:10:02,220 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 183 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:10:02,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 467 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:10:02,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14016 states. [2022-02-16 14:10:02,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14016 to 13796. [2022-02-16 14:10:02,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13796 states, 13795 states have (on average 1.9093874592243567) internal successors, (26340), 13795 states have internal predecessors, (26340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:02,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13796 states to 13796 states and 26340 transitions. [2022-02-16 14:10:02,446 INFO L78 Accepts]: Start accepts. Automaton has 13796 states and 26340 transitions. Word has length 32 [2022-02-16 14:10:02,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:10:02,446 INFO L470 AbstractCegarLoop]: Abstraction has 13796 states and 26340 transitions. [2022-02-16 14:10:02,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:02,447 INFO L276 IsEmpty]: Start isEmpty. Operand 13796 states and 26340 transitions. [2022-02-16 14:10:02,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-16 14:10:02,463 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:10:02,463 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:10:02,479 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 14:10:02,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:10:02,665 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:10:02,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:10:02,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1066697468, now seen corresponding path program 65 times [2022-02-16 14:10:02,665 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:10:02,665 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561054425] [2022-02-16 14:10:02,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:10:02,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:10:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:10:03,851 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:03,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:10:03,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561054425] [2022-02-16 14:10:03,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561054425] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:10:03,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788771026] [2022-02-16 14:10:03,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:10:03,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:10:03,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:10:03,853 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 14:10:03,853 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 14:10:03,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-02-16 14:10:03,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:10:03,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-16 14:10:03,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:10:04,948 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:04,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:10:07,967 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:07,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788771026] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:10:07,967 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:10:07,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-02-16 14:10:07,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737367978] [2022-02-16 14:10:07,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:10:07,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-16 14:10:07,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:10:07,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-16 14:10:07,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=828, Unknown=0, NotChecked=0, Total=1122 [2022-02-16 14:10:07,968 INFO L87 Difference]: Start difference. First operand 13796 states and 26340 transitions. Second operand has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:14,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:10:14,566 INFO L93 Difference]: Finished difference Result 14744 states and 27946 transitions. [2022-02-16 14:10:14,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-16 14:10:14,567 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-02-16 14:10:14,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:10:14,587 INFO L225 Difference]: With dead ends: 14744 [2022-02-16 14:10:14,588 INFO L226 Difference]: Without dead ends: 14683 [2022-02-16 14:10:14,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2863 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=2017, Invalid=5815, Unknown=0, NotChecked=0, Total=7832 [2022-02-16 14:10:14,589 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 479 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-16 14:10:14,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 773 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-16 14:10:14,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14683 states. [2022-02-16 14:10:14,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14683 to 14048. [2022-02-16 14:10:14,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14048 states, 14047 states have (on average 1.9079518758453762) internal successors, (26801), 14047 states have internal predecessors, (26801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:14,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14048 states to 14048 states and 26801 transitions. [2022-02-16 14:10:14,859 INFO L78 Accepts]: Start accepts. Automaton has 14048 states and 26801 transitions. Word has length 34 [2022-02-16 14:10:14,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:10:14,859 INFO L470 AbstractCegarLoop]: Abstraction has 14048 states and 26801 transitions. [2022-02-16 14:10:14,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:14,859 INFO L276 IsEmpty]: Start isEmpty. Operand 14048 states and 26801 transitions. [2022-02-16 14:10:14,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-16 14:10:14,876 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:10:14,876 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:10:14,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-02-16 14:10:15,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:10:15,076 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:10:15,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:10:15,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1562268376, now seen corresponding path program 66 times [2022-02-16 14:10:15,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:10:15,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119043876] [2022-02-16 14:10:15,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:10:15,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:10:15,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2022-02-16 14:12:35,877 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-02-16 14:12:35,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-16 14:12:35,877 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 35 with TraceHistMax 6,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PolyPacSimplificationTermWalker was simplifying a ∧-17-4-11-4-12-4-11-4-11-4-11-4-10-4-10-4-10-4-10-4-10-4-10-4-9-4-8-4-8-4-8-4-7-4-4-4-4-4-4-4-4-4-4-4-3-4-2-4-2-4-2-4-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-2-2-3-3-2-2-2-2-2-2-1 context. [2022-02-16 14:12:35,879 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-02-16 14:12:35,879 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-02-16 14:12:35,879 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-02-16 14:12:35,879 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-16 14:12:35,881 INFO L732 BasicCegarLoop]: Path program histogram: [66, 3, 3, 2] [2022-02-16 14:12:35,883 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-16 14:12:35,883 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-16 14:12:35,884 INFO L202 PluginConnector]: Adding new model misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.02 02:12:35 BasicIcfg [2022-02-16 14:12:35,884 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-16 14:12:35,885 INFO L158 Benchmark]: Toolchain (without parser) took 730377.21ms. Allocated memory was 178.3MB in the beginning and 2.0GB in the end (delta: 1.8GB). Free memory was 143.4MB in the beginning and 1.1GB in the end (delta: -973.4MB). Peak memory consumption was 1.4GB. Max. memory is 8.0GB. [2022-02-16 14:12:35,885 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.14ms. Allocated memory is still 178.3MB. Free memory was 144.6MB in the beginning and 144.5MB in the end (delta: 71.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-16 14:12:35,885 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.24ms. Allocated memory is still 178.3MB. Free memory was 143.3MB in the beginning and 141.8MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-16 14:12:35,885 INFO L158 Benchmark]: Boogie Preprocessor took 16.96ms. Allocated memory is still 178.3MB. Free memory was 141.8MB in the beginning and 140.9MB in the end (delta: 961.0kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-16 14:12:35,885 INFO L158 Benchmark]: RCFGBuilder took 283.85ms. Allocated memory is still 178.3MB. Free memory was 140.8MB in the beginning and 130.9MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-16 14:12:35,886 INFO L158 Benchmark]: TraceAbstraction took 730044.12ms. Allocated memory was 178.3MB in the beginning and 2.0GB in the end (delta: 1.8GB). Free memory was 130.4MB in the beginning and 1.1GB in the end (delta: -986.4MB). Peak memory consumption was 1.3GB. Max. memory is 8.0GB. [2022-02-16 14:12:35,886 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.14ms. Allocated memory is still 178.3MB. Free memory was 144.6MB in the beginning and 144.5MB in the end (delta: 71.4kB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 26.24ms. Allocated memory is still 178.3MB. Free memory was 143.3MB in the beginning and 141.8MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 16.96ms. Allocated memory is still 178.3MB. Free memory was 141.8MB in the beginning and 140.9MB in the end (delta: 961.0kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 283.85ms. Allocated memory is still 178.3MB. Free memory was 140.8MB in the beginning and 130.9MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 730044.12ms. Allocated memory was 178.3MB in the beginning and 2.0GB in the end (delta: 1.8GB). Free memory was 130.4MB in the beginning and 1.1GB in the end (delta: -986.4MB). Peak memory consumption was 1.3GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 35 with TraceHistMax 6,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PolyPacSimplificationTermWalker was simplifying a ∧-17-4-11-4-12-4-11-4-11-4-11-4-10-4-10-4-10-4-10-4-10-4-10-4-9-4-8-4-8-4-8-4-7-4-4-4-4-4-4-4-4-4-4-4-3-4-2-4-2-4-2-4-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-2-2-3-3-2-2-2-2-2-2-1 context. - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 35 with TraceHistMax 6,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PolyPacSimplificationTermWalker was simplifying a ∧-17-4-11-4-12-4-11-4-11-4-11-4-10-4-10-4-10-4-10-4-10-4-10-4-9-4-8-4-8-4-8-4-7-4-4-4-4-4-4-4-4-4-4-4-3-4-2-4-2-4-2-4-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-2-2-3-3-2-2-2-2-2-2-1 context. - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 35 with TraceHistMax 6,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PolyPacSimplificationTermWalker was simplifying a ∧-17-4-11-4-12-4-11-4-11-4-11-4-10-4-10-4-10-4-10-4-10-4-10-4-9-4-8-4-8-4-8-4-7-4-4-4-4-4-4-4-4-4-4-4-3-4-2-4-2-4-2-4-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-2-2-3-3-2-2-2-2-2-2-1 context. - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 35 with TraceHistMax 6,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PolyPacSimplificationTermWalker was simplifying a ∧-17-4-11-4-12-4-11-4-11-4-11-4-10-4-10-4-10-4-10-4-10-4-10-4-9-4-8-4-8-4-8-4-7-4-4-4-4-4-4-4-4-4-4-4-3-4-2-4-2-4-2-4-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-2-2-3-3-2-2-2-2-2-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 36 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 729.9s, OverallIterations: 74, TraceHistogramMax: 9, PathProgramHistogramMax: 66, EmptinessCheckTime: 0.7s, AutomataDifference: 328.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.9s, PartialOrderReductionTime: 0.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 19916 SdHoareTripleChecker+Valid, 30.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19916 mSDsluCounter, 33850 SdHoareTripleChecker+Invalid, 25.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 48023 mSDsCounter, 11677 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 45505 IncrementalHoareTripleChecker+Invalid, 57182 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11677 mSolverCounterUnsat, 2816 mSDtfsCounter, 45505 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 7878 GetRequests, 2811 SyntacticMatches, 4 SemanticMatches, 5063 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146782 ImplicationChecksByTransitivity, 350.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14920occurred in iteration=0, InterpolantAutomatonStates: 3730, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.7s AutomataMinimizationTime, 73 MinimizatonAttempts, 36807 StatesRemovedByMinimization, 72 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 235.6s InterpolantComputationTime, 4108 NumberOfCodeBlocks, 4108 NumberOfCodeBlocksAsserted, 334 NumberOfCheckSat, 5927 ConstructedInterpolants, 0 QuantifiedInterpolants, 224849 SizeOfPredicates, 205 NumberOfNonLiveVariables, 3852 ConjunctsInSsa, 944 ConjunctsInUnsatCore, 213 InterpolantComputations, 3 PerfectInterpolantSequences, 729/7291 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown