/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/MirabelleConcurrentIncrement.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-16 13:25:44,041 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-16 13:25:44,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-16 13:25:44,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-16 13:25:44,135 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-MCRwithDepranks-BasicCegarLoop.epf [2022-02-16 13:25:44,159 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-16 13:25:44,159 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-16 13:25:44,160 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-16 13:25:44,160 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-16 13:25:44,160 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-16 13:25:44,160 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-16 13:25:44,161 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-16 13:25:44,161 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-16 13:25:44,161 INFO L138 SettingsManager]: * Use SBE=true [2022-02-16 13:25:44,161 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-16 13:25:44,162 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-16 13:25:44,162 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-16 13:25:44,162 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-16 13:25:44,162 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-16 13:25:44,162 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-16 13:25:44,162 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-16 13:25:44,162 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-16 13:25:44,162 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-16 13:25:44,162 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-16 13:25:44,162 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-16 13:25:44,162 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-16 13:25:44,163 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-16 13:25:44,163 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-16 13:25:44,163 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-16 13:25:44,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-16 13:25:44,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-16 13:25:44,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-16 13:25:44,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-16 13:25:44,164 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-16 13:25:44,164 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-16 13:25:44,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-16 13:25:44,164 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-16 13:25:44,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-16 13:25:44,164 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITH_DEPRANKS [2022-02-16 13:25:44,165 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-16 13:25:44,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-16 13:25:44,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-16 13:25:44,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-16 13:25:44,365 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-16 13:25:44,366 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-16 13:25:44,367 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/MirabelleConcurrentIncrement.bpl [2022-02-16 13:25:44,367 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/MirabelleConcurrentIncrement.bpl' [2022-02-16 13:25:44,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-16 13:25:44,385 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-16 13:25:44,386 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-16 13:25:44,386 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-16 13:25:44,386 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-16 13:25:44,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:25:44" (1/1) ... [2022-02-16 13:25:44,399 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:25:44" (1/1) ... [2022-02-16 13:25:44,403 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-16 13:25:44,405 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-16 13:25:44,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-16 13:25:44,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-16 13:25:44,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-16 13:25:44,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:25:44" (1/1) ... [2022-02-16 13:25:44,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:25:44" (1/1) ... [2022-02-16 13:25:44,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:25:44" (1/1) ... [2022-02-16 13:25:44,412 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:25:44" (1/1) ... [2022-02-16 13:25:44,413 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:25:44" (1/1) ... [2022-02-16 13:25:44,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:25:44" (1/1) ... [2022-02-16 13:25:44,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:25:44" (1/1) ... [2022-02-16 13:25:44,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-16 13:25:44,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-16 13:25:44,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-16 13:25:44,418 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-16 13:25:44,419 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:25:44" (1/1) ... [2022-02-16 13:25:44,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-16 13:25:44,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:44,441 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-16 13:25:44,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-16 13:25:44,472 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-16 13:25:44,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-16 13:25:44,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-16 13:25:44,473 INFO L124 BoogieDeclarations]: Specification and implementation of procedure T1 given in one single declaration [2022-02-16 13:25:44,473 INFO L130 BoogieDeclarations]: Found specification of procedure T1 [2022-02-16 13:25:44,473 INFO L138 BoogieDeclarations]: Found implementation of procedure T1 [2022-02-16 13:25:44,473 INFO L124 BoogieDeclarations]: Specification and implementation of procedure T2 given in one single declaration [2022-02-16 13:25:44,473 INFO L130 BoogieDeclarations]: Found specification of procedure T2 [2022-02-16 13:25:44,474 INFO L138 BoogieDeclarations]: Found implementation of procedure T2 [2022-02-16 13:25:44,474 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-16 13:25:44,505 INFO L234 CfgBuilder]: Building ICFG [2022-02-16 13:25:44,506 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-16 13:25:44,560 INFO L275 CfgBuilder]: Performing block encoding [2022-02-16 13:25:44,565 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-16 13:25:44,565 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-16 13:25:44,566 INFO L202 PluginConnector]: Adding new model MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:25:44 BoogieIcfgContainer [2022-02-16 13:25:44,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-16 13:25:44,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-16 13:25:44,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-16 13:25:44,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-16 13:25:44,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:25:44" (1/2) ... [2022-02-16 13:25:44,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e9586eb and model type MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 01:25:44, skipping insertion in model container [2022-02-16 13:25:44,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:25:44" (2/2) ... [2022-02-16 13:25:44,574 INFO L111 eAbstractionObserver]: Analyzing ICFG MirabelleConcurrentIncrement.bpl [2022-02-16 13:25:44,586 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-16 13:25:44,587 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-16 13:25:44,587 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-16 13:25:44,587 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-16 13:25:44,606 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-02-16 13:25:44,633 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-16 13:25:44,637 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-16 13:25:44,637 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-02-16 13:25:44,643 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 20 transitions, 62 flow [2022-02-16 13:25:44,654 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:44,720 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 729 transitions and produced 366 states. [2022-02-16 13:25:44,727 INFO L276 IsEmpty]: Start isEmpty. Operand has 366 states, 274 states have (on average 1.7481751824817517) internal successors, (479), 365 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:44,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-02-16 13:25:44,735 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:44,735 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:44,736 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:44,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:44,740 INFO L85 PathProgramCache]: Analyzing trace with hash -303159428, now seen corresponding path program 1 times [2022-02-16 13:25:44,746 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:44,746 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188333835] [2022-02-16 13:25:44,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:44,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:44,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:44,847 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:44,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188333835] [2022-02-16 13:25:44,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188333835] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:25:44,848 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 13:25:44,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-16 13:25:44,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905597228] [2022-02-16 13:25:44,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:25:44,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-16 13:25:44,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:44,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-16 13:25:44,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-16 13:25:44,868 INFO L87 Difference]: Start difference. First operand has 366 states, 274 states have (on average 1.7481751824817517) internal successors, (479), 365 states have internal predecessors, (479), 0 states have call successors, (0), 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 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:44,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:44,891 INFO L93 Difference]: Finished difference Result 298 states and 405 transitions. [2022-02-16 13:25:44,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-16 13:25:44,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-02-16 13:25:44,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:44,899 INFO L225 Difference]: With dead ends: 298 [2022-02-16 13:25:44,899 INFO L226 Difference]: Without dead ends: 156 [2022-02-16 13:25:44,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 13:25:44,903 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:44,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 19 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:25:44,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-02-16 13:25:44,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 20. [2022-02-16 13:25:44,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:44,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2022-02-16 13:25:44,987 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 10 [2022-02-16 13:25:44,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:44,988 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2022-02-16 13:25:44,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:44,988 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2022-02-16 13:25:44,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-02-16 13:25:44,989 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:44,989 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:44,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-16 13:25:44,989 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:44,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:44,990 INFO L85 PathProgramCache]: Analyzing trace with hash -303158498, now seen corresponding path program 1 times [2022-02-16 13:25:44,990 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:44,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159819906] [2022-02-16 13:25:44,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:44,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:45,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:45,013 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:45,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159819906] [2022-02-16 13:25:45,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159819906] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:25:45,013 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 13:25:45,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-02-16 13:25:45,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746585265] [2022-02-16 13:25:45,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:25:45,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-16 13:25:45,014 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:45,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-16 13:25:45,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-16 13:25:45,015 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:45,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:45,034 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2022-02-16 13:25:45,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-16 13:25:45,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-02-16 13:25:45,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:45,035 INFO L225 Difference]: With dead ends: 35 [2022-02-16 13:25:45,035 INFO L226 Difference]: Without dead ends: 30 [2022-02-16 13:25:45,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 13:25:45,037 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:45,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 6 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:25:45,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-16 13:25:45,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2022-02-16 13:25:45,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:45,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2022-02-16 13:25:45,046 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 10 [2022-02-16 13:25:45,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:45,046 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2022-02-16 13:25:45,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:45,047 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2022-02-16 13:25:45,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-16 13:25:45,047 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:45,047 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:45,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-16 13:25:45,048 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:45,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:45,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1409966684, now seen corresponding path program 1 times [2022-02-16 13:25:45,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:45,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384481283] [2022-02-16 13:25:45,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:45,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:45,102 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 13:25:45,103 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:45,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384481283] [2022-02-16 13:25:45,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384481283] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:45,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522865611] [2022-02-16 13:25:45,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:45,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:45,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:45,107 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:45,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-16 13:25:45,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:45,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-16 13:25:45,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:45,186 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 13:25:45,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:25:45,217 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 13:25:45,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522865611] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:25:45,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:25:45,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-02-16 13:25:45,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776865639] [2022-02-16 13:25:45,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:25:45,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-16 13:25:45,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:45,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-16 13:25:45,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-16 13:25:45,219 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:45,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:45,273 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2022-02-16 13:25:45,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-16 13:25:45,274 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-02-16 13:25:45,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:45,274 INFO L225 Difference]: With dead ends: 41 [2022-02-16 13:25:45,274 INFO L226 Difference]: Without dead ends: 41 [2022-02-16 13:25:45,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-16 13:25:45,275 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 23 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:45,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 15 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:25:45,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-02-16 13:25:45,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2022-02-16 13:25:45,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:45,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2022-02-16 13:25:45,278 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 12 [2022-02-16 13:25:45,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:45,279 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2022-02-16 13:25:45,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:45,279 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2022-02-16 13:25:45,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-16 13:25:45,279 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:45,279 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:45,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-16 13:25:45,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:45,492 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:45,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:45,492 INFO L85 PathProgramCache]: Analyzing trace with hash -201246244, now seen corresponding path program 1 times [2022-02-16 13:25:45,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:45,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595471784] [2022-02-16 13:25:45,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:45,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:45,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:45,533 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 13:25:45,533 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:45,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595471784] [2022-02-16 13:25:45,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595471784] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:25:45,534 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 13:25:45,534 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-16 13:25:45,534 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450966475] [2022-02-16 13:25:45,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:25:45,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-16 13:25:45,535 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:45,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-16 13:25:45,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-16 13:25:45,535 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:45,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:45,563 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2022-02-16 13:25:45,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-16 13:25:45,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-02-16 13:25:45,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:45,564 INFO L225 Difference]: With dead ends: 28 [2022-02-16 13:25:45,564 INFO L226 Difference]: Without dead ends: 25 [2022-02-16 13:25:45,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-16 13:25:45,565 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:45,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 8 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:25:45,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-02-16 13:25:45,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2022-02-16 13:25:45,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:45,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2022-02-16 13:25:45,567 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 12 [2022-02-16 13:25:45,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:45,568 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2022-02-16 13:25:45,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:45,568 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2022-02-16 13:25:45,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-16 13:25:45,568 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:45,568 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:45,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-16 13:25:45,568 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:45,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:45,569 INFO L85 PathProgramCache]: Analyzing trace with hash 347332256, now seen corresponding path program 2 times [2022-02-16 13:25:45,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:45,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104976437] [2022-02-16 13:25:45,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:45,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:45,618 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 13:25:45,619 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:45,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104976437] [2022-02-16 13:25:45,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104976437] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:45,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484502486] [2022-02-16 13:25:45,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:25:45,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:45,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:45,621 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:45,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-16 13:25:45,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:25:45,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:25:45,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-16 13:25:45,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:45,692 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 13:25:45,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:25:45,728 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 13:25:45,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484502486] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:25:45,728 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:25:45,728 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-02-16 13:25:45,728 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742611667] [2022-02-16 13:25:45,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:25:45,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-16 13:25:45,729 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:45,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-16 13:25:45,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-16 13:25:45,729 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:45,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:45,773 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2022-02-16 13:25:45,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-16 13:25:45,774 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-02-16 13:25:45,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:45,774 INFO L225 Difference]: With dead ends: 30 [2022-02-16 13:25:45,774 INFO L226 Difference]: Without dead ends: 30 [2022-02-16 13:25:45,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-16 13:25:45,775 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:45,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 10 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:25:45,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-16 13:25:45,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2022-02-16 13:25:45,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:45,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2022-02-16 13:25:45,778 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 12 [2022-02-16 13:25:45,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:45,778 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2022-02-16 13:25:45,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:45,778 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2022-02-16 13:25:45,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:25:45,779 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:45,779 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:45,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-16 13:25:46,000 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 13:25:46,001 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:46,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:46,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1139579290, now seen corresponding path program 1 times [2022-02-16 13:25:46,002 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:46,002 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704386620] [2022-02-16 13:25:46,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:46,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:46,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:46,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:46,055 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:46,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704386620] [2022-02-16 13:25:46,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704386620] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:46,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990801321] [2022-02-16 13:25:46,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:46,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:46,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:46,071 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:46,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-16 13:25:46,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:46,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:25:46,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:46,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:46,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:25:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:46,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990801321] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:25:46,236 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:25:46,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2022-02-16 13:25:46,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804737498] [2022-02-16 13:25:46,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:25:46,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-16 13:25:46,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:46,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-16 13:25:46,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-16 13:25:46,238 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) 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 13:25:46,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:46,267 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2022-02-16 13:25:46,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-16 13:25:46,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) 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 13:25:46,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:46,268 INFO L225 Difference]: With dead ends: 56 [2022-02-16 13:25:46,268 INFO L226 Difference]: Without dead ends: 51 [2022-02-16 13:25:46,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-16 13:25:46,269 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:46,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 13 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:25:46,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-16 13:25:46,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2022-02-16 13:25:46,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:46,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 53 transitions. [2022-02-16 13:25:46,276 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 53 transitions. Word has length 14 [2022-02-16 13:25:46,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:46,276 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 53 transitions. [2022-02-16 13:25:46,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) 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 13:25:46,276 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 53 transitions. [2022-02-16 13:25:46,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:25:46,277 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:46,277 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:46,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-16 13:25:46,491 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 13:25:46,492 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:46,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:46,492 INFO L85 PathProgramCache]: Analyzing trace with hash 262307298, now seen corresponding path program 2 times [2022-02-16 13:25:46,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:46,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781071602] [2022-02-16 13:25:46,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:46,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:46,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:46,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:46,524 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:46,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781071602] [2022-02-16 13:25:46,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781071602] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:46,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806382647] [2022-02-16 13:25:46,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:25:46,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:46,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:46,526 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:46,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-16 13:25:46,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:25:46,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:25:46,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-16 13:25:46,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:46,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:46,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:25:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:46,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806382647] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:25:46,734 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:25:46,735 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 4, 4] total 6 [2022-02-16 13:25:46,735 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885153378] [2022-02-16 13:25:46,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:25:46,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-16 13:25:46,735 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:46,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-16 13:25:46,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-16 13:25:46,736 INFO L87 Difference]: Start difference. First operand 36 states and 53 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:46,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:46,811 INFO L93 Difference]: Finished difference Result 80 states and 108 transitions. [2022-02-16 13:25:46,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-16 13:25:46,811 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:25:46,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:46,812 INFO L225 Difference]: With dead ends: 80 [2022-02-16 13:25:46,812 INFO L226 Difference]: Without dead ends: 75 [2022-02-16 13:25:46,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-02-16 13:25:46,813 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 21 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:46,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:25:46,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-16 13:25:46,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 45. [2022-02-16 13:25:46,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 44 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 13:25:46,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 69 transitions. [2022-02-16 13:25:46,816 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 69 transitions. Word has length 14 [2022-02-16 13:25:46,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:46,817 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 69 transitions. [2022-02-16 13:25:46,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:46,817 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 69 transitions. [2022-02-16 13:25:46,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:25:46,817 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:46,817 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:46,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-16 13:25:47,024 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 13:25:47,024 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:47,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:47,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1182728664, now seen corresponding path program 3 times [2022-02-16 13:25:47,025 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:47,025 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194720903] [2022-02-16 13:25:47,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:47,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:47,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:47,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:47,059 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:47,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194720903] [2022-02-16 13:25:47,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194720903] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:47,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652667974] [2022-02-16 13:25:47,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:25:47,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:47,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:47,061 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:47,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-16 13:25:47,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:25:47,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:25:47,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-16 13:25:47,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:47,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:25:47,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:47,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652667974] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:25:47,147 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:25:47,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-16 13:25:47,148 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298843730] [2022-02-16 13:25:47,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:25:47,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-16 13:25:47,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:47,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-16 13:25:47,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-16 13:25:47,149 INFO L87 Difference]: Start difference. First operand 45 states and 69 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:47,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:47,223 INFO L93 Difference]: Finished difference Result 84 states and 116 transitions. [2022-02-16 13:25:47,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:25:47,223 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 13:25:47,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:47,224 INFO L225 Difference]: With dead ends: 84 [2022-02-16 13:25:47,224 INFO L226 Difference]: Without dead ends: 84 [2022-02-16 13:25:47,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-02-16 13:25:47,227 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 31 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:47,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 28 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:25:47,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-02-16 13:25:47,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 51. [2022-02-16 13:25:47,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.64) internal successors, (82), 50 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 13:25:47,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 82 transitions. [2022-02-16 13:25:47,253 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 82 transitions. Word has length 16 [2022-02-16 13:25:47,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:47,253 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 82 transitions. [2022-02-16 13:25:47,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:47,253 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 82 transitions. [2022-02-16 13:25:47,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:25:47,254 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:47,254 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:47,270 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 13:25:47,459 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 13:25:47,460 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:47,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:47,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1004668584, now seen corresponding path program 4 times [2022-02-16 13:25:47,461 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:47,461 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53531381] [2022-02-16 13:25:47,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:47,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:47,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:47,490 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:47,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53531381] [2022-02-16 13:25:47,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53531381] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:47,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2678225] [2022-02-16 13:25:47,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:25:47,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:47,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:47,491 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:47,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-16 13:25:47,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:25:47,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:25:47,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-16 13:25:47,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:47,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:25:47,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:47,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2678225] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:25:47,565 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:25:47,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-16 13:25:47,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855208132] [2022-02-16 13:25:47,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:25:47,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-16 13:25:47,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:47,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-16 13:25:47,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-16 13:25:47,566 INFO L87 Difference]: Start difference. First operand 51 states and 82 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:47,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:47,615 INFO L93 Difference]: Finished difference Result 84 states and 119 transitions. [2022-02-16 13:25:47,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:25:47,615 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 13:25:47,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:47,615 INFO L225 Difference]: With dead ends: 84 [2022-02-16 13:25:47,615 INFO L226 Difference]: Without dead ends: 79 [2022-02-16 13:25:47,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-16 13:25:47,616 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 41 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:47,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 14 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:25:47,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-16 13:25:47,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2022-02-16 13:25:47,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.6140350877192982) internal successors, (92), 57 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:47,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 92 transitions. [2022-02-16 13:25:47,619 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 92 transitions. Word has length 16 [2022-02-16 13:25:47,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:47,619 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 92 transitions. [2022-02-16 13:25:47,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:47,619 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 92 transitions. [2022-02-16 13:25:47,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:25:47,620 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:47,620 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:47,636 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 13:25:47,838 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 13:25:47,839 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:47,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:47,840 INFO L85 PathProgramCache]: Analyzing trace with hash 593250652, now seen corresponding path program 5 times [2022-02-16 13:25:47,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:47,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114875406] [2022-02-16 13:25:47,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:47,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:47,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:47,869 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:47,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114875406] [2022-02-16 13:25:47,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114875406] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:47,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163743737] [2022-02-16 13:25:47,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:25:47,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:47,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:47,870 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:47,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-16 13:25:47,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:25:47,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:25:47,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-16 13:25:47,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:47,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:25:47,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:47,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163743737] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:25:47,935 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:25:47,935 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-16 13:25:47,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230132785] [2022-02-16 13:25:47,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:25:47,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-16 13:25:47,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:47,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-16 13:25:47,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-16 13:25:47,938 INFO L87 Difference]: Start difference. First operand 58 states and 92 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:47,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:47,978 INFO L93 Difference]: Finished difference Result 82 states and 115 transitions. [2022-02-16 13:25:47,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:25:47,978 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 13:25:47,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:47,979 INFO L225 Difference]: With dead ends: 82 [2022-02-16 13:25:47,979 INFO L226 Difference]: Without dead ends: 82 [2022-02-16 13:25:47,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-16 13:25:47,979 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 25 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:47,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 18 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:25:47,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-02-16 13:25:47,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 56. [2022-02-16 13:25:47,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.5636363636363637) internal successors, (86), 55 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:47,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 86 transitions. [2022-02-16 13:25:47,982 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 86 transitions. Word has length 16 [2022-02-16 13:25:47,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:47,982 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 86 transitions. [2022-02-16 13:25:47,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:47,982 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 86 transitions. [2022-02-16 13:25:47,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:25:47,983 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:47,983 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:48,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-16 13:25:48,201 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 13:25:48,201 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:48,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:48,202 INFO L85 PathProgramCache]: Analyzing trace with hash 305456672, now seen corresponding path program 6 times [2022-02-16 13:25:48,202 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:48,202 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396940149] [2022-02-16 13:25:48,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:48,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:48,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:48,234 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:48,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396940149] [2022-02-16 13:25:48,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396940149] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:48,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993156544] [2022-02-16 13:25:48,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:25:48,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:48,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:48,235 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:48,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-16 13:25:48,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 13:25:48,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:25:48,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-16 13:25:48,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:48,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:48,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:25:48,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:48,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993156544] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:25:48,305 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:25:48,305 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-16 13:25:48,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361740761] [2022-02-16 13:25:48,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:25:48,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-16 13:25:48,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:48,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-16 13:25:48,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-16 13:25:48,306 INFO L87 Difference]: Start difference. First operand 56 states and 86 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:48,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:48,356 INFO L93 Difference]: Finished difference Result 70 states and 99 transitions. [2022-02-16 13:25:48,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-16 13:25:48,356 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 13:25:48,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:48,356 INFO L225 Difference]: With dead ends: 70 [2022-02-16 13:25:48,356 INFO L226 Difference]: Without dead ends: 69 [2022-02-16 13:25:48,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-16 13:25:48,357 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 23 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:48,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 14 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:25:48,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-02-16 13:25:48,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2022-02-16 13:25:48,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.5357142857142858) internal successors, (86), 56 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:48,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 86 transitions. [2022-02-16 13:25:48,364 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 86 transitions. Word has length 16 [2022-02-16 13:25:48,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:48,364 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 86 transitions. [2022-02-16 13:25:48,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:48,365 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 86 transitions. [2022-02-16 13:25:48,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:25:48,366 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:48,366 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:48,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-02-16 13:25:48,575 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 13:25:48,576 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:48,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:48,576 INFO L85 PathProgramCache]: Analyzing trace with hash 434992160, now seen corresponding path program 7 times [2022-02-16 13:25:48,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:48,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450455891] [2022-02-16 13:25:48,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:48,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:48,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:48,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:48,601 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:48,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450455891] [2022-02-16 13:25:48,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450455891] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:48,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375268720] [2022-02-16 13:25:48,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:25:48,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:48,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:48,602 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:48,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-16 13:25:48,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:48,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-16 13:25:48,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:48,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:25:48,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:48,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375268720] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:25:48,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:25:48,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-16 13:25:48,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989646112] [2022-02-16 13:25:48,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:25:48,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-16 13:25:48,674 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:48,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-16 13:25:48,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-16 13:25:48,674 INFO L87 Difference]: Start difference. First operand 57 states and 86 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:48,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:48,733 INFO L93 Difference]: Finished difference Result 78 states and 109 transitions. [2022-02-16 13:25:48,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:25:48,733 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 13:25:48,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:48,733 INFO L225 Difference]: With dead ends: 78 [2022-02-16 13:25:48,733 INFO L226 Difference]: Without dead ends: 78 [2022-02-16 13:25:48,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-02-16 13:25:48,734 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:48,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 22 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:25:48,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-02-16 13:25:48,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 60. [2022-02-16 13:25:48,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.5254237288135593) internal successors, (90), 59 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:48,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 90 transitions. [2022-02-16 13:25:48,736 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 90 transitions. Word has length 16 [2022-02-16 13:25:48,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:48,736 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 90 transitions. [2022-02-16 13:25:48,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:48,737 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 90 transitions. [2022-02-16 13:25:48,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:25:48,737 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:48,737 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:48,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-16 13:25:48,954 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 13:25:48,954 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:48,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:48,955 INFO L85 PathProgramCache]: Analyzing trace with hash 157701284, now seen corresponding path program 8 times [2022-02-16 13:25:48,955 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:48,955 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191649327] [2022-02-16 13:25:48,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:48,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:48,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:48,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:48,976 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:48,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191649327] [2022-02-16 13:25:48,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191649327] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:48,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317091456] [2022-02-16 13:25:48,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:25:48,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:48,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:48,977 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:48,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-16 13:25:48,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:25:48,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:25:48,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-16 13:25:48,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:49,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:25:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:49,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317091456] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:25:49,054 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:25:49,054 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-16 13:25:49,054 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446263278] [2022-02-16 13:25:49,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:25:49,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-16 13:25:49,054 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:49,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-16 13:25:49,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-16 13:25:49,055 INFO L87 Difference]: Start difference. First operand 60 states and 90 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:49,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:49,110 INFO L93 Difference]: Finished difference Result 89 states and 123 transitions. [2022-02-16 13:25:49,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:25:49,110 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 13:25:49,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:49,111 INFO L225 Difference]: With dead ends: 89 [2022-02-16 13:25:49,111 INFO L226 Difference]: Without dead ends: 86 [2022-02-16 13:25:49,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-16 13:25:49,112 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 42 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:49,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 11 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:25:49,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-16 13:25:49,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 66. [2022-02-16 13:25:49,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.5538461538461539) internal successors, (101), 65 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:49,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 101 transitions. [2022-02-16 13:25:49,114 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 101 transitions. Word has length 16 [2022-02-16 13:25:49,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:49,114 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 101 transitions. [2022-02-16 13:25:49,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:49,114 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 101 transitions. [2022-02-16 13:25:49,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:25:49,115 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:49,115 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:49,133 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 13:25:49,329 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 13:25:49,329 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:49,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:49,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1807174166, now seen corresponding path program 9 times [2022-02-16 13:25:49,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:49,330 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966542761] [2022-02-16 13:25:49,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:49,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:49,365 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:49,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966542761] [2022-02-16 13:25:49,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966542761] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:49,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675345379] [2022-02-16 13:25:49,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:25:49,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:49,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:49,367 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:49,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-16 13:25:49,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:25:49,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:25:49,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 13:25:49,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:49,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:49,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:25:49,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:49,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675345379] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:25:49,590 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:25:49,590 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 7, 7] total 13 [2022-02-16 13:25:49,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700312553] [2022-02-16 13:25:49,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:25:49,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:25:49,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:49,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:25:49,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:25:49,592 INFO L87 Difference]: Start difference. First operand 66 states and 101 transitions. Second operand has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:49,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:49,784 INFO L93 Difference]: Finished difference Result 195 states and 269 transitions. [2022-02-16 13:25:49,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:25:49,784 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:25:49,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:49,785 INFO L225 Difference]: With dead ends: 195 [2022-02-16 13:25:49,785 INFO L226 Difference]: Without dead ends: 185 [2022-02-16 13:25:49,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:25:49,786 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 136 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:49,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 61 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:25:49,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-02-16 13:25:49,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 80. [2022-02-16 13:25:49,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.6075949367088607) internal successors, (127), 79 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:49,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 127 transitions. [2022-02-16 13:25:49,789 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 127 transitions. Word has length 18 [2022-02-16 13:25:49,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:49,789 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 127 transitions. [2022-02-16 13:25:49,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:49,789 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 127 transitions. [2022-02-16 13:25:49,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:25:49,790 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:49,790 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:49,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-02-16 13:25:49,995 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 13:25:49,996 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:49,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:49,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1834949026, now seen corresponding path program 10 times [2022-02-16 13:25:49,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:49,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799359452] [2022-02-16 13:25:49,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:49,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:50,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:25:50,043 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:50,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799359452] [2022-02-16 13:25:50,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799359452] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:50,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991724161] [2022-02-16 13:25:50,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:25:50,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:50,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:50,044 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:50,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-16 13:25:50,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:25:50,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:25:50,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 13:25:50,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:50,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:25:50,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:25:50,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:25:50,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991724161] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:25:50,145 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:25:50,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 3] total 7 [2022-02-16 13:25:50,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623336154] [2022-02-16 13:25:50,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:25:50,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-16 13:25:50,146 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:50,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-16 13:25:50,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-02-16 13:25:50,146 INFO L87 Difference]: Start difference. First operand 80 states and 127 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:50,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:50,236 INFO L93 Difference]: Finished difference Result 160 states and 234 transitions. [2022-02-16 13:25:50,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 13:25:50,236 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:25:50,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:50,237 INFO L225 Difference]: With dead ends: 160 [2022-02-16 13:25:50,237 INFO L226 Difference]: Without dead ends: 150 [2022-02-16 13:25:50,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-02-16 13:25:50,238 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 70 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:50,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 30 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:25:50,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-02-16 13:25:50,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 93. [2022-02-16 13:25:50,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.641304347826087) internal successors, (151), 92 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:50,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 151 transitions. [2022-02-16 13:25:50,240 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 151 transitions. Word has length 18 [2022-02-16 13:25:50,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:50,241 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 151 transitions. [2022-02-16 13:25:50,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:50,241 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 151 transitions. [2022-02-16 13:25:50,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:25:50,241 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:50,241 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:50,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-16 13:25:50,453 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 13:25:50,453 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:50,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:50,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1612417822, now seen corresponding path program 11 times [2022-02-16 13:25:50,454 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:50,454 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257015363] [2022-02-16 13:25:50,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:50,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:50,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:50,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:50,493 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:50,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257015363] [2022-02-16 13:25:50,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257015363] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:50,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494053987] [2022-02-16 13:25:50,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:25:50,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:50,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:50,495 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:50,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-16 13:25:50,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:25:50,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:25:50,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 13:25:50,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:50,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:50,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:25:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:50,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494053987] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:25:50,610 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:25:50,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-02-16 13:25:50,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194320874] [2022-02-16 13:25:50,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:25:50,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-16 13:25:50,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:50,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-16 13:25:50,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-16 13:25:50,611 INFO L87 Difference]: Start difference. First operand 93 states and 151 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:50,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:50,645 INFO L93 Difference]: Finished difference Result 143 states and 215 transitions. [2022-02-16 13:25:50,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-16 13:25:50,646 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:25:50,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:50,646 INFO L225 Difference]: With dead ends: 143 [2022-02-16 13:25:50,646 INFO L226 Difference]: Without dead ends: 138 [2022-02-16 13:25:50,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-16 13:25:50,647 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:50,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 26 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:25:50,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-02-16 13:25:50,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 111. [2022-02-16 13:25:50,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.6636363636363636) internal successors, (183), 110 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:50,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 183 transitions. [2022-02-16 13:25:50,650 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 183 transitions. Word has length 18 [2022-02-16 13:25:50,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:50,650 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 183 transitions. [2022-02-16 13:25:50,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:50,650 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 183 transitions. [2022-02-16 13:25:50,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:25:50,651 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:50,651 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:50,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-16 13:25:50,859 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 13:25:50,859 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:50,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:50,860 INFO L85 PathProgramCache]: Analyzing trace with hash 603880148, now seen corresponding path program 12 times [2022-02-16 13:25:50,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:50,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377760073] [2022-02-16 13:25:50,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:50,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:50,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:50,904 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:50,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377760073] [2022-02-16 13:25:50,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377760073] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:50,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962623928] [2022-02-16 13:25:50,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:25:50,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:50,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:50,910 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:50,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-16 13:25:50,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 13:25:50,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:25:50,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:25:50,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:50,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:50,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:25:51,001 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:51,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962623928] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:25:51,002 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:25:51,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-02-16 13:25:51,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545717553] [2022-02-16 13:25:51,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:25:51,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-16 13:25:51,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:51,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-16 13:25:51,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-02-16 13:25:51,004 INFO L87 Difference]: Start difference. First operand 111 states and 183 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:51,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:51,060 INFO L93 Difference]: Finished difference Result 159 states and 239 transitions. [2022-02-16 13:25:51,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:25:51,061 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:25:51,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:51,063 INFO L225 Difference]: With dead ends: 159 [2022-02-16 13:25:51,063 INFO L226 Difference]: Without dead ends: 151 [2022-02-16 13:25:51,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-02-16 13:25:51,065 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 53 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:51,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 20 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:25:51,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-02-16 13:25:51,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 124. [2022-02-16 13:25:51,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.6422764227642277) internal successors, (202), 123 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:51,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 202 transitions. [2022-02-16 13:25:51,069 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 202 transitions. Word has length 20 [2022-02-16 13:25:51,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:51,069 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 202 transitions. [2022-02-16 13:25:51,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:51,070 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 202 transitions. [2022-02-16 13:25:51,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:25:51,072 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:51,072 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:51,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-02-16 13:25:51,274 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 13:25:51,275 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:51,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:51,275 INFO L85 PathProgramCache]: Analyzing trace with hash -900701480, now seen corresponding path program 13 times [2022-02-16 13:25:51,275 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:51,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79695546] [2022-02-16 13:25:51,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:51,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:51,307 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:51,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79695546] [2022-02-16 13:25:51,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79695546] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:51,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014624039] [2022-02-16 13:25:51,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:25:51,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:51,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:51,312 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:51,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-16 13:25:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:51,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:25:51,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:51,359 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:51,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:25:51,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:51,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014624039] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:25:51,394 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:25:51,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-16 13:25:51,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146485714] [2022-02-16 13:25:51,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:25:51,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-16 13:25:51,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:51,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-16 13:25:51,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-16 13:25:51,395 INFO L87 Difference]: Start difference. First operand 124 states and 202 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:51,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:51,444 INFO L93 Difference]: Finished difference Result 162 states and 237 transitions. [2022-02-16 13:25:51,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:25:51,444 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:25:51,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:51,445 INFO L225 Difference]: With dead ends: 162 [2022-02-16 13:25:51,445 INFO L226 Difference]: Without dead ends: 162 [2022-02-16 13:25:51,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-02-16 13:25:51,446 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 49 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:51,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 23 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:25:51,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-02-16 13:25:51,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 116. [2022-02-16 13:25:51,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.5826086956521739) internal successors, (182), 115 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:51,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 182 transitions. [2022-02-16 13:25:51,450 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 182 transitions. Word has length 20 [2022-02-16 13:25:51,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:51,450 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 182 transitions. [2022-02-16 13:25:51,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:51,450 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 182 transitions. [2022-02-16 13:25:51,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:25:51,450 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:51,450 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:51,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-16 13:25:51,663 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 13:25:51,664 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:51,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:51,664 INFO L85 PathProgramCache]: Analyzing trace with hash -688673380, now seen corresponding path program 14 times [2022-02-16 13:25:51,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:51,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878393999] [2022-02-16 13:25:51,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:51,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:51,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:51,691 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:51,692 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:51,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878393999] [2022-02-16 13:25:51,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878393999] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:51,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462154695] [2022-02-16 13:25:51,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:25:51,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:51,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:51,693 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:51,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-16 13:25:51,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:25:51,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:25:51,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:25:51,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:51,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:25:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:51,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462154695] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:25:51,785 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:25:51,786 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-02-16 13:25:51,786 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24267838] [2022-02-16 13:25:51,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:25:51,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-16 13:25:51,786 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:51,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-16 13:25:51,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-16 13:25:51,786 INFO L87 Difference]: Start difference. First operand 116 states and 182 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:51,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:51,856 INFO L93 Difference]: Finished difference Result 165 states and 234 transitions. [2022-02-16 13:25:51,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:25:51,856 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:25:51,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:51,857 INFO L225 Difference]: With dead ends: 165 [2022-02-16 13:25:51,857 INFO L226 Difference]: Without dead ends: 164 [2022-02-16 13:25:51,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-02-16 13:25:51,858 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 40 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:51,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 28 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:25:51,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-16 13:25:51,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 113. [2022-02-16 13:25:51,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.5625) internal successors, (175), 112 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:51,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 175 transitions. [2022-02-16 13:25:51,869 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 175 transitions. Word has length 20 [2022-02-16 13:25:51,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:51,869 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 175 transitions. [2022-02-16 13:25:51,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:51,869 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 175 transitions. [2022-02-16 13:25:51,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:25:51,869 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:51,869 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:51,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-16 13:25:52,071 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 13:25:52,072 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:52,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:52,072 INFO L85 PathProgramCache]: Analyzing trace with hash 532058276, now seen corresponding path program 15 times [2022-02-16 13:25:52,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:52,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844786405] [2022-02-16 13:25:52,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:52,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:52,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:52,107 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:52,107 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:52,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844786405] [2022-02-16 13:25:52,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844786405] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:52,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932388479] [2022-02-16 13:25:52,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:25:52,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:52,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:52,108 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:52,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-16 13:25:52,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-16 13:25:52,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:25:52,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:25:52,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:52,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-16 13:25:52,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-16 13:25:52,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932388479] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:25:52,208 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-16 13:25:52,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-02-16 13:25:52,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022603217] [2022-02-16 13:25:52,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:25:52,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-16 13:25:52,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:52,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-16 13:25:52,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:25:52,209 INFO L87 Difference]: Start difference. First operand 113 states and 175 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:52,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:52,266 INFO L93 Difference]: Finished difference Result 133 states and 205 transitions. [2022-02-16 13:25:52,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:25:52,266 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:25:52,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:52,268 INFO L225 Difference]: With dead ends: 133 [2022-02-16 13:25:52,268 INFO L226 Difference]: Without dead ends: 110 [2022-02-16 13:25:52,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:25:52,268 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:52,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 18 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:25:52,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-16 13:25:52,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2022-02-16 13:25:52,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.5480769230769231) internal successors, (161), 104 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:52,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 161 transitions. [2022-02-16 13:25:52,275 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 161 transitions. Word has length 20 [2022-02-16 13:25:52,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:52,275 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 161 transitions. [2022-02-16 13:25:52,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:52,275 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 161 transitions. [2022-02-16 13:25:52,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:25:52,276 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:52,276 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:52,294 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 13:25:52,491 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 13:25:52,491 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:52,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:52,492 INFO L85 PathProgramCache]: Analyzing trace with hash -2008777372, now seen corresponding path program 16 times [2022-02-16 13:25:52,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:52,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829314861] [2022-02-16 13:25:52,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:52,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:52,523 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:52,523 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:52,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829314861] [2022-02-16 13:25:52,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829314861] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:52,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578688695] [2022-02-16 13:25:52,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:25:52,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:52,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:52,525 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:52,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-16 13:25:52,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:25:52,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:25:52,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:25:52,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:52,582 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:52,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:25:52,613 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:52,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578688695] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:25:52,614 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:25:52,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-02-16 13:25:52,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513661481] [2022-02-16 13:25:52,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:25:52,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-16 13:25:52,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:52,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-16 13:25:52,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-16 13:25:52,614 INFO L87 Difference]: Start difference. First operand 105 states and 161 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:52,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:52,698 INFO L93 Difference]: Finished difference Result 133 states and 192 transitions. [2022-02-16 13:25:52,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:25:52,699 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:25:52,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:52,699 INFO L225 Difference]: With dead ends: 133 [2022-02-16 13:25:52,699 INFO L226 Difference]: Without dead ends: 133 [2022-02-16 13:25:52,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-02-16 13:25:52,700 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 32 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:52,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 27 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:25:52,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-02-16 13:25:52,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 108. [2022-02-16 13:25:52,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.5420560747663552) internal successors, (165), 107 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:52,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 165 transitions. [2022-02-16 13:25:52,703 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 165 transitions. Word has length 20 [2022-02-16 13:25:52,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:52,703 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 165 transitions. [2022-02-16 13:25:52,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:52,703 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 165 transitions. [2022-02-16 13:25:52,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:25:52,703 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:52,703 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:52,729 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 13:25:52,919 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 13:25:52,919 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:52,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:52,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1333967840, now seen corresponding path program 17 times [2022-02-16 13:25:52,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:52,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430333901] [2022-02-16 13:25:52,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:52,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:52,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:52,954 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:52,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430333901] [2022-02-16 13:25:52,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430333901] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:52,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363756571] [2022-02-16 13:25:52,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:25:52,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:52,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:52,955 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:52,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-16 13:25:52,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:25:52,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:25:52,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:25:52,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:53,015 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:53,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:25:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:53,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363756571] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:25:53,062 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:25:53,062 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-02-16 13:25:53,062 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048488888] [2022-02-16 13:25:53,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:25:53,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-16 13:25:53,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:53,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-16 13:25:53,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-02-16 13:25:53,063 INFO L87 Difference]: Start difference. First operand 108 states and 165 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:53,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:53,145 INFO L93 Difference]: Finished difference Result 139 states and 201 transitions. [2022-02-16 13:25:53,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:25:53,145 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:25:53,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:53,146 INFO L225 Difference]: With dead ends: 139 [2022-02-16 13:25:53,146 INFO L226 Difference]: Without dead ends: 139 [2022-02-16 13:25:53,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:25:53,147 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 19 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:53,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 28 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:25:53,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-02-16 13:25:53,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2022-02-16 13:25:53,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.5585585585585586) internal successors, (173), 111 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:53,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 173 transitions. [2022-02-16 13:25:53,150 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 173 transitions. Word has length 20 [2022-02-16 13:25:53,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:53,150 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 173 transitions. [2022-02-16 13:25:53,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:53,150 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 173 transitions. [2022-02-16 13:25:53,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:25:53,150 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:53,150 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:53,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-16 13:25:53,363 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 13:25:53,363 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:53,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:53,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1861842012, now seen corresponding path program 18 times [2022-02-16 13:25:53,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:53,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766960722] [2022-02-16 13:25:53,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:53,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:53,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:53,397 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:53,398 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:53,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766960722] [2022-02-16 13:25:53,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766960722] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:53,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48801792] [2022-02-16 13:25:53,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:25:53,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:53,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:53,399 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:53,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-16 13:25:53,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 13:25:53,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:25:53,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:25:53,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:53,447 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:53,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:25:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:53,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48801792] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:25:53,478 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:25:53,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-02-16 13:25:53,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908273258] [2022-02-16 13:25:53,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:25:53,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-16 13:25:53,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:53,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-16 13:25:53,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-02-16 13:25:53,479 INFO L87 Difference]: Start difference. First operand 112 states and 173 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:53,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:53,558 INFO L93 Difference]: Finished difference Result 161 states and 230 transitions. [2022-02-16 13:25:53,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:25:53,558 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:25:53,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:53,559 INFO L225 Difference]: With dead ends: 161 [2022-02-16 13:25:53,559 INFO L226 Difference]: Without dead ends: 156 [2022-02-16 13:25:53,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:25:53,559 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 57 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:53,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 15 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:25:53,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-02-16 13:25:53,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 124. [2022-02-16 13:25:53,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.5691056910569106) internal successors, (193), 123 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:53,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 193 transitions. [2022-02-16 13:25:53,562 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 193 transitions. Word has length 20 [2022-02-16 13:25:53,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:53,562 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 193 transitions. [2022-02-16 13:25:53,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:53,563 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 193 transitions. [2022-02-16 13:25:53,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-16 13:25:53,563 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:53,563 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:53,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-16 13:25:53,779 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 13:25:53,780 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:53,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:53,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1372560278, now seen corresponding path program 19 times [2022-02-16 13:25:53,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:53,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202974676] [2022-02-16 13:25:53,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:53,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:25:53,825 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:53,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202974676] [2022-02-16 13:25:53,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202974676] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:53,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287602896] [2022-02-16 13:25:53,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:25:53,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:53,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:53,827 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:53,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:53,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 13:25:53,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:53,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-16 13:25:53,895 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:25:53,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:25:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:25:53,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287602896] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:25:53,948 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:25:53,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-02-16 13:25:53,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681878308] [2022-02-16 13:25:53,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:25:53,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-16 13:25:53,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:53,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-16 13:25:53,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-16 13:25:53,949 INFO L87 Difference]: Start difference. First operand 124 states and 193 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:54,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:54,009 INFO L93 Difference]: Finished difference Result 193 states and 284 transitions. [2022-02-16 13:25:54,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-16 13:25:54,010 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 13:25:54,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:54,010 INFO L225 Difference]: With dead ends: 193 [2022-02-16 13:25:54,011 INFO L226 Difference]: Without dead ends: 188 [2022-02-16 13:25:54,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-16 13:25:54,011 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:54,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 37 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:25:54,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-16 13:25:54,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 153. [2022-02-16 13:25:54,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.5986842105263157) internal successors, (243), 152 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:54,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 243 transitions. [2022-02-16 13:25:54,015 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 243 transitions. Word has length 22 [2022-02-16 13:25:54,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:54,015 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 243 transitions. [2022-02-16 13:25:54,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:54,015 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 243 transitions. [2022-02-16 13:25:54,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-16 13:25:54,016 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:54,016 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:54,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-16 13:25:54,227 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 13:25:54,227 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:54,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:54,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1291096282, now seen corresponding path program 20 times [2022-02-16 13:25:54,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:54,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366739338] [2022-02-16 13:25:54,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:54,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:54,275 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:25:54,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:54,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366739338] [2022-02-16 13:25:54,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366739338] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:54,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734784645] [2022-02-16 13:25:54,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:25:54,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:54,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:54,277 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:54,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-16 13:25:54,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:25:54,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:25:54,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 13:25:54,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:54,396 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:54,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:25:54,508 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:54,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734784645] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:25:54,509 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:25:54,509 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-02-16 13:25:54,509 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329352767] [2022-02-16 13:25:54,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:25:54,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:25:54,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:54,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:25:54,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:25:54,510 INFO L87 Difference]: Start difference. First operand 153 states and 243 transitions. Second operand has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:54,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:54,875 INFO L93 Difference]: Finished difference Result 352 states and 499 transitions. [2022-02-16 13:25:54,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-16 13:25:54,876 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-16 13:25:54,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:54,877 INFO L225 Difference]: With dead ends: 352 [2022-02-16 13:25:54,877 INFO L226 Difference]: Without dead ends: 335 [2022-02-16 13:25:54,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=1233, Unknown=0, NotChecked=0, Total=1560 [2022-02-16 13:25:54,878 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 199 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:54,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 96 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:25:54,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-02-16 13:25:54,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 186. [2022-02-16 13:25:54,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.6378378378378378) internal successors, (303), 185 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:54,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 303 transitions. [2022-02-16 13:25:54,882 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 303 transitions. Word has length 22 [2022-02-16 13:25:54,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:54,882 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 303 transitions. [2022-02-16 13:25:54,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:54,882 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 303 transitions. [2022-02-16 13:25:54,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-16 13:25:54,883 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:54,883 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:54,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-16 13:25:55,083 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 13:25:55,083 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:55,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:55,084 INFO L85 PathProgramCache]: Analyzing trace with hash 876756830, now seen corresponding path program 21 times [2022-02-16 13:25:55,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:55,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074408796] [2022-02-16 13:25:55,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:55,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:55,130 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:25:55,131 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:55,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074408796] [2022-02-16 13:25:55,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074408796] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:55,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889490983] [2022-02-16 13:25:55,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:25:55,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:55,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:55,132 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:55,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-16 13:25:55,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-16 13:25:55,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:25:55,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:25:55,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:55,235 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-16 13:25:55,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-16 13:25:55,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889490983] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:25:55,235 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-16 13:25:55,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 10 [2022-02-16 13:25:55,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225434209] [2022-02-16 13:25:55,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:25:55,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-16 13:25:55,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:55,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-16 13:25:55,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-16 13:25:55,237 INFO L87 Difference]: Start difference. First operand 186 states and 303 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:55,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:55,280 INFO L93 Difference]: Finished difference Result 197 states and 315 transitions. [2022-02-16 13:25:55,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:25:55,280 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-16 13:25:55,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:55,281 INFO L225 Difference]: With dead ends: 197 [2022-02-16 13:25:55,281 INFO L226 Difference]: Without dead ends: 179 [2022-02-16 13:25:55,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-02-16 13:25:55,282 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 43 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:55,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 14 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:25:55,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-02-16 13:25:55,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 139. [2022-02-16 13:25:55,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.5869565217391304) internal successors, (219), 138 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:55,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 219 transitions. [2022-02-16 13:25:55,287 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 219 transitions. Word has length 22 [2022-02-16 13:25:55,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:55,287 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 219 transitions. [2022-02-16 13:25:55,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:55,288 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 219 transitions. [2022-02-16 13:25:55,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-16 13:25:55,288 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:55,288 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:55,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-16 13:25:55,488 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 13:25:55,489 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:55,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:55,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1981566626, now seen corresponding path program 22 times [2022-02-16 13:25:55,489 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:55,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526053708] [2022-02-16 13:25:55,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:55,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:55,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:55,527 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 13:25:55,528 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:55,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526053708] [2022-02-16 13:25:55,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526053708] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:55,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096465808] [2022-02-16 13:25:55,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:25:55,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:55,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:55,529 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:55,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-16 13:25:55,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:25:55,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:25:55,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 13:25:55,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:55,614 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 13:25:55,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:25:55,668 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 13:25:55,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096465808] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:25:55,669 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:25:55,669 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-02-16 13:25:55,669 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683486853] [2022-02-16 13:25:55,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:25:55,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-16 13:25:55,669 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:55,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-16 13:25:55,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-16 13:25:55,670 INFO L87 Difference]: Start difference. First operand 139 states and 219 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:55,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:55,725 INFO L93 Difference]: Finished difference Result 183 states and 273 transitions. [2022-02-16 13:25:55,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-16 13:25:55,726 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 13:25:55,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:55,739 INFO L225 Difference]: With dead ends: 183 [2022-02-16 13:25:55,739 INFO L226 Difference]: Without dead ends: 177 [2022-02-16 13:25:55,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 12 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-16 13:25:55,740 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:55,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 29 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:25:55,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-02-16 13:25:55,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 157. [2022-02-16 13:25:55,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.5833333333333333) internal successors, (247), 156 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:55,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 247 transitions. [2022-02-16 13:25:55,744 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 247 transitions. Word has length 22 [2022-02-16 13:25:55,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:55,744 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 247 transitions. [2022-02-16 13:25:55,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:55,744 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 247 transitions. [2022-02-16 13:25:55,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 13:25:55,744 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:55,744 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:55,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-16 13:25:55,945 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 13:25:55,945 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:55,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:55,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1477240276, now seen corresponding path program 23 times [2022-02-16 13:25:55,946 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:55,946 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360286344] [2022-02-16 13:25:55,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:55,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:55,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:55,987 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 13:25:55,987 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:55,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360286344] [2022-02-16 13:25:55,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360286344] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:55,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506360644] [2022-02-16 13:25:55,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:25:55,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:55,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:55,989 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:55,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-16 13:25:56,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-16 13:25:56,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:25:56,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 13:25:56,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:56,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:25:56,091 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:56,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506360644] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:25:56,091 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:25:56,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-02-16 13:25:56,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765319771] [2022-02-16 13:25:56,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:25:56,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-16 13:25:56,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:56,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-16 13:25:56,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-02-16 13:25:56,092 INFO L87 Difference]: Start difference. First operand 157 states and 247 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:56,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:56,221 INFO L93 Difference]: Finished difference Result 205 states and 310 transitions. [2022-02-16 13:25:56,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 13:25:56,221 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-16 13:25:56,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:56,222 INFO L225 Difference]: With dead ends: 205 [2022-02-16 13:25:56,222 INFO L226 Difference]: Without dead ends: 205 [2022-02-16 13:25:56,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:25:56,223 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 36 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:56,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 27 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:25:56,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-02-16 13:25:56,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 155. [2022-02-16 13:25:56,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.577922077922078) internal successors, (243), 154 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:56,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 243 transitions. [2022-02-16 13:25:56,226 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 243 transitions. Word has length 24 [2022-02-16 13:25:56,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:56,226 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 243 transitions. [2022-02-16 13:25:56,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:56,227 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 243 transitions. [2022-02-16 13:25:56,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 13:25:56,227 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:56,227 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:56,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-16 13:25:56,443 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 13:25:56,443 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:56,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:56,444 INFO L85 PathProgramCache]: Analyzing trace with hash -448238508, now seen corresponding path program 24 times [2022-02-16 13:25:56,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:56,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409142377] [2022-02-16 13:25:56,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:56,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:56,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:56,478 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:25:56,478 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:56,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409142377] [2022-02-16 13:25:56,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409142377] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:56,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251794365] [2022-02-16 13:25:56,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:25:56,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:56,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:56,480 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:56,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-16 13:25:56,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 13:25:56,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:25:56,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 13:25:56,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:56,533 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:25:56,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:25:56,579 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:25:56,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251794365] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:25:56,580 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:25:56,580 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2022-02-16 13:25:56,580 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84162258] [2022-02-16 13:25:56,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:25:56,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-16 13:25:56,581 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:56,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-16 13:25:56,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-02-16 13:25:56,582 INFO L87 Difference]: Start difference. First operand 155 states and 243 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:56,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:56,654 INFO L93 Difference]: Finished difference Result 210 states and 307 transitions. [2022-02-16 13:25:56,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 13:25:56,654 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-16 13:25:56,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:56,655 INFO L225 Difference]: With dead ends: 210 [2022-02-16 13:25:56,655 INFO L226 Difference]: Without dead ends: 204 [2022-02-16 13:25:56,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:25:56,656 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 68 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:56,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 26 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:25:56,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-02-16 13:25:56,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 174. [2022-02-16 13:25:56,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.5664739884393064) internal successors, (271), 173 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:56,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 271 transitions. [2022-02-16 13:25:56,659 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 271 transitions. Word has length 24 [2022-02-16 13:25:56,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:56,660 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 271 transitions. [2022-02-16 13:25:56,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:56,660 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 271 transitions. [2022-02-16 13:25:56,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 13:25:56,660 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:56,660 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:56,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-16 13:25:56,875 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 13:25:56,875 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:56,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:56,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1683570260, now seen corresponding path program 25 times [2022-02-16 13:25:56,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:56,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145947474] [2022-02-16 13:25:56,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:56,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:56,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:56,902 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:56,902 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:56,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145947474] [2022-02-16 13:25:56,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145947474] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:56,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403175886] [2022-02-16 13:25:56,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:25:56,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:56,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:56,905 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:56,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-16 13:25:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:56,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 13:25:56,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:56,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:25:56,993 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:56,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403175886] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:25:56,994 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:25:56,994 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-02-16 13:25:56,994 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888691829] [2022-02-16 13:25:56,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:25:56,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-16 13:25:56,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:56,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-16 13:25:56,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-16 13:25:56,995 INFO L87 Difference]: Start difference. First operand 174 states and 271 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:57,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:57,061 INFO L93 Difference]: Finished difference Result 209 states and 301 transitions. [2022-02-16 13:25:57,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 13:25:57,062 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-16 13:25:57,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:57,062 INFO L225 Difference]: With dead ends: 209 [2022-02-16 13:25:57,062 INFO L226 Difference]: Without dead ends: 208 [2022-02-16 13:25:57,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-02-16 13:25:57,063 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 33 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:57,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 30 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:25:57,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-02-16 13:25:57,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 175. [2022-02-16 13:25:57,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.5517241379310345) internal successors, (270), 174 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:57,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 270 transitions. [2022-02-16 13:25:57,066 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 270 transitions. Word has length 24 [2022-02-16 13:25:57,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:57,067 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 270 transitions. [2022-02-16 13:25:57,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:57,067 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 270 transitions. [2022-02-16 13:25:57,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 13:25:57,067 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:57,067 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:57,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-16 13:25:57,267 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 13:25:57,268 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:57,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:57,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1533911140, now seen corresponding path program 26 times [2022-02-16 13:25:57,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:57,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023644952] [2022-02-16 13:25:57,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:57,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:57,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:57,308 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:57,308 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:57,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023644952] [2022-02-16 13:25:57,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023644952] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:57,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482320710] [2022-02-16 13:25:57,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:25:57,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:57,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:57,324 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:57,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:25:57,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:25:57,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 13:25:57,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:57,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-16 13:25:57,406 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:57,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:25:57,450 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:57,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482320710] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:25:57,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:25:57,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-02-16 13:25:57,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906005384] [2022-02-16 13:25:57,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:25:57,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-16 13:25:57,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:57,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-16 13:25:57,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-16 13:25:57,451 INFO L87 Difference]: Start difference. First operand 175 states and 270 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:57,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:57,531 INFO L93 Difference]: Finished difference Result 199 states and 298 transitions. [2022-02-16 13:25:57,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 13:25:57,532 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-16 13:25:57,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:57,532 INFO L225 Difference]: With dead ends: 199 [2022-02-16 13:25:57,532 INFO L226 Difference]: Without dead ends: 198 [2022-02-16 13:25:57,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:25:57,533 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:57,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 21 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:25:57,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-02-16 13:25:57,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 165. [2022-02-16 13:25:57,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.5426829268292683) internal successors, (253), 164 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:57,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 253 transitions. [2022-02-16 13:25:57,538 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 253 transitions. Word has length 24 [2022-02-16 13:25:57,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:57,538 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 253 transitions. [2022-02-16 13:25:57,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:57,538 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 253 transitions. [2022-02-16 13:25:57,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 13:25:57,538 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:57,538 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:57,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-16 13:25:57,741 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 13:25:57,741 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:57,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:57,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1927852060, now seen corresponding path program 27 times [2022-02-16 13:25:57,741 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:57,741 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944310363] [2022-02-16 13:25:57,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:57,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:57,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:57,782 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:57,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:57,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944310363] [2022-02-16 13:25:57,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944310363] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:57,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291315260] [2022-02-16 13:25:57,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:25:57,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:57,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:57,784 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:57,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-16 13:25:57,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:25:57,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:25:57,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:25:57,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:57,895 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-02-16 13:25:57,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-16 13:25:57,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291315260] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:25:57,895 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-16 13:25:57,895 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2022-02-16 13:25:57,895 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082742064] [2022-02-16 13:25:57,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:25:57,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-16 13:25:57,896 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:57,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-16 13:25:57,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:25:57,896 INFO L87 Difference]: Start difference. First operand 165 states and 253 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:57,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:57,964 INFO L93 Difference]: Finished difference Result 177 states and 268 transitions. [2022-02-16 13:25:57,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:25:57,965 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 13:25:57,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:57,966 INFO L225 Difference]: With dead ends: 177 [2022-02-16 13:25:57,966 INFO L226 Difference]: Without dead ends: 155 [2022-02-16 13:25:57,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:25:57,967 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:57,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 13 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:25:57,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-02-16 13:25:57,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 138. [2022-02-16 13:25:57,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.4744525547445255) internal successors, (202), 137 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:57,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 202 transitions. [2022-02-16 13:25:57,971 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 202 transitions. Word has length 24 [2022-02-16 13:25:57,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:57,971 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 202 transitions. [2022-02-16 13:25:57,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:57,971 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 202 transitions. [2022-02-16 13:25:57,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 13:25:57,971 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:57,971 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:57,989 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 13:25:58,172 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 13:25:58,172 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:58,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:58,172 INFO L85 PathProgramCache]: Analyzing trace with hash -173720412, now seen corresponding path program 28 times [2022-02-16 13:25:58,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:58,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355472623] [2022-02-16 13:25:58,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:58,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:58,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:58,214 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:58,214 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:58,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355472623] [2022-02-16 13:25:58,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355472623] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:58,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925422190] [2022-02-16 13:25:58,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:25:58,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:58,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:58,216 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:58,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-16 13:25:58,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:25:58,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:25:58,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 13:25:58,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:58,273 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:58,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:25:58,318 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:58,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925422190] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:25:58,318 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:25:58,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-02-16 13:25:58,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887888178] [2022-02-16 13:25:58,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:25:58,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-16 13:25:58,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:58,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-16 13:25:58,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-16 13:25:58,319 INFO L87 Difference]: Start difference. First operand 138 states and 202 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:58,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:58,422 INFO L93 Difference]: Finished difference Result 176 states and 247 transitions. [2022-02-16 13:25:58,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 13:25:58,422 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-16 13:25:58,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:58,423 INFO L225 Difference]: With dead ends: 176 [2022-02-16 13:25:58,423 INFO L226 Difference]: Without dead ends: 176 [2022-02-16 13:25:58,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:25:58,423 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:58,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 32 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:25:58,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-16 13:25:58,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 133. [2022-02-16 13:25:58,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.4621212121212122) internal successors, (193), 132 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:58,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 193 transitions. [2022-02-16 13:25:58,427 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 193 transitions. Word has length 24 [2022-02-16 13:25:58,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:58,427 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 193 transitions. [2022-02-16 13:25:58,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:58,427 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 193 transitions. [2022-02-16 13:25:58,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 13:25:58,427 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:58,427 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:58,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-16 13:25:58,628 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 13:25:58,628 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:58,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:58,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1344454820, now seen corresponding path program 29 times [2022-02-16 13:25:58,629 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:58,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344381684] [2022-02-16 13:25:58,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:58,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:58,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:58,664 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:58,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:58,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344381684] [2022-02-16 13:25:58,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344381684] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:58,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758251002] [2022-02-16 13:25:58,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:25:58,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:58,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:58,666 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:58,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-16 13:25:58,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-16 13:25:58,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:25:58,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 13:25:58,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:58,718 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:58,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:25:58,754 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:58,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758251002] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:25:58,754 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:25:58,754 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-02-16 13:25:58,754 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646690138] [2022-02-16 13:25:58,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:25:58,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-16 13:25:58,754 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:58,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-16 13:25:58,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-02-16 13:25:58,755 INFO L87 Difference]: Start difference. First operand 133 states and 193 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:58,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:58,847 INFO L93 Difference]: Finished difference Result 178 states and 247 transitions. [2022-02-16 13:25:58,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 13:25:58,848 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-16 13:25:58,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:58,848 INFO L225 Difference]: With dead ends: 178 [2022-02-16 13:25:58,848 INFO L226 Difference]: Without dead ends: 178 [2022-02-16 13:25:58,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:25:58,849 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:58,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 38 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:25:58,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-02-16 13:25:58,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 146. [2022-02-16 13:25:58,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.4758620689655173) internal successors, (214), 145 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:58,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 214 transitions. [2022-02-16 13:25:58,852 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 214 transitions. Word has length 24 [2022-02-16 13:25:58,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:58,852 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 214 transitions. [2022-02-16 13:25:58,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:58,852 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 214 transitions. [2022-02-16 13:25:58,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-16 13:25:58,853 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:58,853 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:58,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-16 13:25:59,067 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 13:25:59,067 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:59,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:59,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1296353376, now seen corresponding path program 30 times [2022-02-16 13:25:59,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:59,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975083815] [2022-02-16 13:25:59,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:59,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:59,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:59,112 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 13:25:59,112 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:59,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975083815] [2022-02-16 13:25:59,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975083815] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:59,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657388024] [2022-02-16 13:25:59,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:25:59,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:59,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:59,113 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:59,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-16 13:25:59,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 13:25:59,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:25:59,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 13:25:59,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:59,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:25:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:59,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657388024] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:25:59,229 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:25:59,229 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-02-16 13:25:59,229 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048710818] [2022-02-16 13:25:59,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:25:59,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-16 13:25:59,230 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:59,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-16 13:25:59,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-02-16 13:25:59,230 INFO L87 Difference]: Start difference. First operand 146 states and 214 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:59,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:59,320 INFO L93 Difference]: Finished difference Result 174 states and 252 transitions. [2022-02-16 13:25:59,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:25:59,320 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-16 13:25:59,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:59,321 INFO L225 Difference]: With dead ends: 174 [2022-02-16 13:25:59,321 INFO L226 Difference]: Without dead ends: 173 [2022-02-16 13:25:59,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:25:59,321 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:59,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 10 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:25:59,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-02-16 13:25:59,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 168. [2022-02-16 13:25:59,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.473053892215569) internal successors, (246), 167 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:59,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 246 transitions. [2022-02-16 13:25:59,325 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 246 transitions. Word has length 24 [2022-02-16 13:25:59,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:59,325 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 246 transitions. [2022-02-16 13:25:59,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:59,325 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 246 transitions. [2022-02-16 13:25:59,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 13:25:59,326 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:59,326 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:59,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-16 13:25:59,526 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 13:25:59,526 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:25:59,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:59,527 INFO L85 PathProgramCache]: Analyzing trace with hash 955964882, now seen corresponding path program 31 times [2022-02-16 13:25:59,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:59,527 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038479501] [2022-02-16 13:25:59,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:59,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:59,575 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:25:59,575 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:59,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038479501] [2022-02-16 13:25:59,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038479501] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:25:59,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745577190] [2022-02-16 13:25:59,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:25:59,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:25:59,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:59,577 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:25:59,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-16 13:25:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:59,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-16 13:25:59,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:25:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:25:59,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:25:59,707 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:25:59,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745577190] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:25:59,708 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:25:59,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-02-16 13:25:59,709 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843978589] [2022-02-16 13:25:59,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:25:59,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-16 13:25:59,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:59,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-16 13:25:59,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-16 13:25:59,710 INFO L87 Difference]: Start difference. First operand 168 states and 246 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:59,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:59,785 INFO L93 Difference]: Finished difference Result 230 states and 322 transitions. [2022-02-16 13:25:59,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-16 13:25:59,785 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 13:25:59,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:59,786 INFO L225 Difference]: With dead ends: 230 [2022-02-16 13:25:59,786 INFO L226 Difference]: Without dead ends: 224 [2022-02-16 13:25:59,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-16 13:25:59,786 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:59,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 44 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:25:59,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-16 13:25:59,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 200. [2022-02-16 13:25:59,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.4824120603015076) internal successors, (295), 199 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:59,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 295 transitions. [2022-02-16 13:25:59,792 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 295 transitions. Word has length 26 [2022-02-16 13:25:59,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:59,792 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 295 transitions. [2022-02-16 13:25:59,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:25:59,792 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 295 transitions. [2022-02-16 13:25:59,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 13:25:59,792 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:59,792 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:25:59,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-16 13:26:00,009 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 13:26:00,010 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:26:00,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:26:00,010 INFO L85 PathProgramCache]: Analyzing trace with hash -211174686, now seen corresponding path program 32 times [2022-02-16 13:26:00,010 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:26:00,011 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571813733] [2022-02-16 13:26:00,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:26:00,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:26:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:26:00,067 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 13:26:00,067 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:26:00,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571813733] [2022-02-16 13:26:00,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571813733] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:26:00,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948837877] [2022-02-16 13:26:00,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:26:00,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:26:00,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:26:00,069 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:26:00,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-16 13:26:00,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:26:00,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:26:00,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 13:26:00,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:26:00,209 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:26:00,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:26:00,382 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:26:00,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948837877] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:26:00,383 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:26:00,383 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 10] total 19 [2022-02-16 13:26:00,383 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277974365] [2022-02-16 13:26:00,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:26:00,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:26:00,383 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:26:00,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:26:00,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:26:00,384 INFO L87 Difference]: Start difference. First operand 200 states and 295 transitions. Second operand has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:26:00,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:26:00,707 INFO L93 Difference]: Finished difference Result 382 states and 556 transitions. [2022-02-16 13:26:00,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-16 13:26:00,708 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 13:26:00,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:26:00,709 INFO L225 Difference]: With dead ends: 382 [2022-02-16 13:26:00,709 INFO L226 Difference]: Without dead ends: 370 [2022-02-16 13:26:00,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=318, Invalid=872, Unknown=0, NotChecked=0, Total=1190 [2022-02-16 13:26:00,709 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 88 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:26:00,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 84 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:26:00,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-02-16 13:26:00,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 226. [2022-02-16 13:26:00,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.4933333333333334) internal successors, (336), 225 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:26:00,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 336 transitions. [2022-02-16 13:26:00,714 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 336 transitions. Word has length 26 [2022-02-16 13:26:00,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:26:00,714 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 336 transitions. [2022-02-16 13:26:00,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:26:00,714 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 336 transitions. [2022-02-16 13:26:00,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 13:26:00,715 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:26:00,715 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:26:00,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-16 13:26:00,919 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 13:26:00,920 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:26:00,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:26:00,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1533657374, now seen corresponding path program 33 times [2022-02-16 13:26:00,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:26:00,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155725697] [2022-02-16 13:26:00,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:26:00,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:26:00,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:26:00,973 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 13:26:00,973 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:26:00,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155725697] [2022-02-16 13:26:00,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155725697] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:26:00,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172034878] [2022-02-16 13:26:00,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:26:00,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:26:00,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:26:00,975 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:26:00,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-16 13:26:00,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-16 13:26:00,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:26:00,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:26:00,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:26:01,075 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-02-16 13:26:01,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-16 13:26:01,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172034878] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:26:01,087 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-16 13:26:01,087 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2022-02-16 13:26:01,087 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986032163] [2022-02-16 13:26:01,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:26:01,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-16 13:26:01,089 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:26:01,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-16 13:26:01,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:26:01,089 INFO L87 Difference]: Start difference. First operand 226 states and 336 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:26:01,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:26:01,150 INFO L93 Difference]: Finished difference Result 232 states and 345 transitions. [2022-02-16 13:26:01,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:26:01,150 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 13:26:01,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:26:01,151 INFO L225 Difference]: With dead ends: 232 [2022-02-16 13:26:01,151 INFO L226 Difference]: Without dead ends: 0 [2022-02-16 13:26:01,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:26:01,151 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:26:01,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 7 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:26:01,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-16 13:26:01,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-16 13:26:01,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:26:01,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-16 13:26:01,152 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2022-02-16 13:26:01,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:26:01,152 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-16 13:26:01,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:26:01,152 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-16 13:26:01,152 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-16 13:26:01,154 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-02-16 13:26:01,154 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-02-16 13:26:01,154 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-02-16 13:26:01,178 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 13:26:01,371 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 13:26:01,373 INFO L732 BasicCegarLoop]: Path program histogram: [33, 2, 1, 1, 1] [2022-02-16 13:26:01,375 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-16 13:26:01,375 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-16 13:26:01,376 INFO L202 PluginConnector]: Adding new model MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.02 01:26:01 BasicIcfg [2022-02-16 13:26:01,376 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-16 13:26:01,377 INFO L158 Benchmark]: Toolchain (without parser) took 16991.91ms. Allocated memory was 194.0MB in the beginning and 232.8MB in the end (delta: 38.8MB). Free memory was 157.5MB in the beginning and 137.7MB in the end (delta: 19.8MB). Peak memory consumption was 59.1MB. Max. memory is 8.0GB. [2022-02-16 13:26:01,377 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 194.0MB. Free memory was 158.6MB in the beginning and 158.4MB in the end (delta: 143.3kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-16 13:26:01,377 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.12ms. Allocated memory is still 194.0MB. Free memory was 157.5MB in the beginning and 155.9MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-16 13:26:01,377 INFO L158 Benchmark]: Boogie Preprocessor took 11.93ms. Allocated memory is still 194.0MB. Free memory was 155.9MB in the beginning and 155.0MB in the end (delta: 882.0kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-16 13:26:01,377 INFO L158 Benchmark]: RCFGBuilder took 147.79ms. Allocated memory is still 194.0MB. Free memory was 154.9MB in the beginning and 146.6MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-02-16 13:26:01,377 INFO L158 Benchmark]: TraceAbstraction took 16809.20ms. Allocated memory was 194.0MB in the beginning and 232.8MB in the end (delta: 38.8MB). Free memory was 146.2MB in the beginning and 137.7MB in the end (delta: 8.5MB). Peak memory consumption was 47.6MB. Max. memory is 8.0GB. [2022-02-16 13:26:01,378 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 0.12ms. Allocated memory is still 194.0MB. Free memory was 158.6MB in the beginning and 158.4MB in the end (delta: 143.3kB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 19.12ms. Allocated memory is still 194.0MB. Free memory was 157.5MB in the beginning and 155.9MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 11.93ms. Allocated memory is still 194.0MB. Free memory was 155.9MB in the beginning and 155.0MB in the end (delta: 882.0kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 147.79ms. Allocated memory is still 194.0MB. Free memory was 154.9MB in the beginning and 146.6MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 16809.20ms. Allocated memory was 194.0MB in the beginning and 232.8MB in the end (delta: 38.8MB). Free memory was 146.2MB in the beginning and 137.7MB in the end (delta: 8.5MB). Peak memory consumption was 47.6MB. 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 - PositiveResult [Line: 24]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 27 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 16.7s, OverallIterations: 38, TraceHistogramMax: 4, PathProgramHistogramMax: 33, EmptinessCheckTime: 0.0s, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1407 SdHoareTripleChecker+Valid, 1.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1407 mSDsluCounter, 993 SdHoareTripleChecker+Invalid, 1.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1586 mSDsCounter, 510 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4492 IncrementalHoareTripleChecker+Invalid, 5002 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 510 mSolverCounterUnsat, 268 mSDtfsCounter, 4492 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1646 GetRequests, 1126 SyntacticMatches, 110 SemanticMatches, 410 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1481 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=366occurred in iteration=0, InterpolantAutomatonStates: 414, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 38 MinimizatonAttempts, 1398 StatesRemovedByMinimization, 37 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.7s InterpolantComputationTime, 1432 NumberOfCodeBlocks, 1416 NumberOfCodeBlocksAsserted, 131 NumberOfCheckSat, 1936 ConstructedInterpolants, 0 QuantifiedInterpolants, 9985 SizeOfPredicates, 54 NumberOfNonLiveVariables, 1096 ConjunctsInSsa, 288 ConjunctsInUnsatCore, 104 InterpolantComputations, 7 PerfectInterpolantSequences, 607/1470 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-02-16 13:26:01,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...