/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-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-01 17:43:53,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-01 17:43:53,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-01 17:43:53,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-01 17:43:53,581 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-FA-NoLbe.epf [2022-03-01 17:43:53,603 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-01 17:43:53,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-01 17:43:53,604 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-01 17:43:53,604 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-01 17:43:53,604 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-01 17:43:53,604 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-01 17:43:53,605 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-01 17:43:53,605 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-01 17:43:53,605 INFO L138 SettingsManager]: * Use SBE=true [2022-03-01 17:43:53,605 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-01 17:43:53,605 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-01 17:43:53,606 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-01 17:43:53,606 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-01 17:43:53,606 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-01 17:43:53,606 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-01 17:43:53,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-01 17:43:53,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-01 17:43:53,606 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-01 17:43:53,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-01 17:43:53,606 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-01 17:43:53,606 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-01 17:43:53,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-01 17:43:53,606 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-01 17:43:53,607 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-01 17:43:53,607 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-01 17:43:53,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 17:43:53,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-01 17:43:53,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-01 17:43:53,608 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-01 17:43:53,608 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-01 17:43:53,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-01 17:43:53,608 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-01 17:43:53,608 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-01 17:43:53,608 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-01 17:43:53,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-01 17:43:53,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-01 17:43:53,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-01 17:43:53,817 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-01 17:43:53,817 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-01 17:43:53,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-2.wvr.bpl [2022-03-01 17:43:53,818 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-2.wvr.bpl' [2022-03-01 17:43:53,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-01 17:43:53,838 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-01 17:43:53,839 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-01 17:43:53,839 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-01 17:43:53,839 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-01 17:43:53,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:43:53" (1/1) ... [2022-03-01 17:43:53,852 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:43:53" (1/1) ... [2022-03-01 17:43:53,856 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-01 17:43:53,857 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-01 17:43:53,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-01 17:43:53,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-01 17:43:53,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-01 17:43:53,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:43:53" (1/1) ... [2022-03-01 17:43:53,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:43:53" (1/1) ... [2022-03-01 17:43:53,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:43:53" (1/1) ... [2022-03-01 17:43:53,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:43:53" (1/1) ... [2022-03-01 17:43:53,866 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:43:53" (1/1) ... [2022-03-01 17:43:53,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:43:53" (1/1) ... [2022-03-01 17:43:53,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:43:53" (1/1) ... [2022-03-01 17:43:53,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-01 17:43:53,872 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-01 17:43:53,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-01 17:43:53,872 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-01 17:43:53,873 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:43:53" (1/1) ... [2022-03-01 17:43:53,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 17:43:53,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:43:53,894 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) [2022-03-01 17:43:53,908 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 [2022-03-01 17:43:53,918 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-01 17:43:53,919 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-01 17:43:53,919 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-01 17:43:53,919 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-01 17:43:53,919 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-01 17:43:53,919 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-01 17:43:53,919 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-01 17:43:53,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-01 17:43:53,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-01 17:43:53,919 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-01 17:43:53,949 INFO L234 CfgBuilder]: Building ICFG [2022-03-01 17:43:53,950 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-01 17:43:54,074 INFO L275 CfgBuilder]: Performing block encoding [2022-03-01 17:43:54,094 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-01 17:43:54,094 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-01 17:43:54,095 INFO L202 PluginConnector]: Adding new model misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 05:43:54 BoogieIcfgContainer [2022-03-01 17:43:54,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-01 17:43:54,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-01 17:43:54,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-01 17:43:54,129 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-01 17:43:54,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:43:53" (1/2) ... [2022-03-01 17:43:54,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24da3535 and model type misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.03 05:43:54, skipping insertion in model container [2022-03-01 17:43:54,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 05:43:54" (2/2) ... [2022-03-01 17:43:54,131 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-2.wvr.bpl [2022-03-01 17:43:54,134 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-01 17:43:54,134 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-01 17:43:54,134 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-01 17:43:54,134 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-01 17:43:54,184 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-01 17:43:54,227 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-01 17:43:54,233 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, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-01 17:43:54,234 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-01 17:43:54,243 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 29 transitions, 74 flow [2022-03-01 17:43:54,268 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 85 states, 84 states have (on average 2.1785714285714284) internal successors, (183), 84 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) [2022-03-01 17:43:54,271 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 84 states have (on average 2.1785714285714284) internal successors, (183), 84 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) [2022-03-01 17:43:54,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-01 17:43:54,278 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:43:54,278 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:43:54,278 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:43:54,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:43:54,285 INFO L85 PathProgramCache]: Analyzing trace with hash -830155331, now seen corresponding path program 1 times [2022-03-01 17:43:54,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:43:54,291 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769810462] [2022-03-01 17:43:54,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:43:54,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:43:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:43:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:43:54,379 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:43:54,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769810462] [2022-03-01 17:43:54,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769810462] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:43:54,380 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:43:54,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-01 17:43:54,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569214844] [2022-03-01 17:43:54,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:43:54,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 17:43:54,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:43:54,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 17:43:54,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 17:43:54,416 INFO L87 Difference]: Start difference. First operand has 85 states, 84 states have (on average 2.1785714285714284) internal successors, (183), 84 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) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:54,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:43:54,447 INFO L93 Difference]: Finished difference Result 134 states and 294 transitions. [2022-03-01 17:43:54,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 17:43:54,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-03-01 17:43:54,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:43:54,456 INFO L225 Difference]: With dead ends: 134 [2022-03-01 17:43:54,457 INFO L226 Difference]: Without dead ends: 127 [2022-03-01 17:43:54,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 17:43:54,460 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:43:54,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 32 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:43:54,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-01 17:43:54,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 94. [2022-03-01 17:43:54,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.161290322580645) internal successors, (201), 93 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:54,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 201 transitions. [2022-03-01 17:43:54,519 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 201 transitions. Word has length 11 [2022-03-01 17:43:54,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:43:54,519 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 201 transitions. [2022-03-01 17:43:54,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:54,520 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 201 transitions. [2022-03-01 17:43:54,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:43:54,521 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:43:54,521 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:43:54,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-01 17:43:54,521 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:43:54,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:43:54,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1624855747, now seen corresponding path program 1 times [2022-03-01 17:43:54,522 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:43:54,522 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105571176] [2022-03-01 17:43:54,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:43:54,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:43:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:43:54,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:43:54,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:43:54,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105571176] [2022-03-01 17:43:54,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105571176] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:43:54,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863928837] [2022-03-01 17:43:54,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:43:54,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:43:54,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:43:54,560 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) [2022-03-01 17:43:54,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-01 17:43:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:43:54,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-01 17:43:54,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:43:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:43:54,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:43:54,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:43:54,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863928837] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:43:54,755 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:43:54,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2022-03-01 17:43:54,756 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936793503] [2022-03-01 17:43:54,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:43:54,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:43:54,756 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:43:54,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:43:54,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:43:54,757 INFO L87 Difference]: Start difference. First operand 94 states and 201 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 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) [2022-03-01 17:43:54,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:43:54,814 INFO L93 Difference]: Finished difference Result 169 states and 356 transitions. [2022-03-01 17:43:54,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:43:54,816 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 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 16 [2022-03-01 17:43:54,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:43:54,817 INFO L225 Difference]: With dead ends: 169 [2022-03-01 17:43:54,818 INFO L226 Difference]: Without dead ends: 169 [2022-03-01 17:43:54,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:43:54,819 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 61 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:43:54,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 49 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:43:54,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-01 17:43:54,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 98. [2022-03-01 17:43:54,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.185567010309278) internal successors, (212), 97 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:54,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 212 transitions. [2022-03-01 17:43:54,832 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 212 transitions. Word has length 16 [2022-03-01 17:43:54,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:43:54,832 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 212 transitions. [2022-03-01 17:43:54,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 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) [2022-03-01 17:43:54,833 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 212 transitions. [2022-03-01 17:43:54,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:43:54,833 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:43:54,834 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:43:54,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-01 17:43:55,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:43:55,052 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:43:55,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:43:55,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1687027948, now seen corresponding path program 1 times [2022-03-01 17:43:55,053 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:43:55,053 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011264345] [2022-03-01 17:43:55,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:43:55,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:43:55,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:43:55,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:43:55,086 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:43:55,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011264345] [2022-03-01 17:43:55,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011264345] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:43:55,086 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:43:55,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 17:43:55,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839034202] [2022-03-01 17:43:55,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:43:55,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:43:55,087 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:43:55,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:43:55,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:43:55,088 INFO L87 Difference]: Start difference. First operand 98 states and 212 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:55,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:43:55,126 INFO L93 Difference]: Finished difference Result 188 states and 400 transitions. [2022-03-01 17:43:55,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:43:55,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:43:55,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:43:55,128 INFO L225 Difference]: With dead ends: 188 [2022-03-01 17:43:55,128 INFO L226 Difference]: Without dead ends: 183 [2022-03-01 17:43:55,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:43:55,129 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 48 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:43:55,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 56 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:43:55,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-01 17:43:55,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 122. [2022-03-01 17:43:55,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.1735537190082646) internal successors, (263), 121 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:55,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 263 transitions. [2022-03-01 17:43:55,143 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 263 transitions. Word has length 16 [2022-03-01 17:43:55,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:43:55,143 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 263 transitions. [2022-03-01 17:43:55,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:55,144 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 263 transitions. [2022-03-01 17:43:55,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:43:55,145 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:43:55,145 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:43:55,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-01 17:43:55,145 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:43:55,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:43:55,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1046891778, now seen corresponding path program 2 times [2022-03-01 17:43:55,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:43:55,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841444794] [2022-03-01 17:43:55,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:43:55,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:43:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:43:55,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:43:55,189 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:43:55,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841444794] [2022-03-01 17:43:55,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841444794] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:43:55,190 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:43:55,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 17:43:55,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848118878] [2022-03-01 17:43:55,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:43:55,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:43:55,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:43:55,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:43:55,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:43:55,191 INFO L87 Difference]: Start difference. First operand 122 states and 263 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:55,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:43:55,219 INFO L93 Difference]: Finished difference Result 156 states and 342 transitions. [2022-03-01 17:43:55,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:43:55,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:43:55,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:43:55,220 INFO L225 Difference]: With dead ends: 156 [2022-03-01 17:43:55,220 INFO L226 Difference]: Without dead ends: 156 [2022-03-01 17:43:55,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:43:55,221 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:43:55,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 47 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:43:55,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-01 17:43:55,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 104. [2022-03-01 17:43:55,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.174757281553398) internal successors, (224), 103 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:55,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 224 transitions. [2022-03-01 17:43:55,233 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 224 transitions. Word has length 16 [2022-03-01 17:43:55,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:43:55,233 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 224 transitions. [2022-03-01 17:43:55,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:55,233 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 224 transitions. [2022-03-01 17:43:55,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:43:55,234 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:43:55,234 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:43:55,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-01 17:43:55,234 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:43:55,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:43:55,235 INFO L85 PathProgramCache]: Analyzing trace with hash 283704697, now seen corresponding path program 2 times [2022-03-01 17:43:55,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:43:55,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822070557] [2022-03-01 17:43:55,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:43:55,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:43:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:43:55,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:43:55,258 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:43:55,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822070557] [2022-03-01 17:43:55,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822070557] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:43:55,258 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:43:55,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 17:43:55,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77343107] [2022-03-01 17:43:55,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:43:55,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:43:55,259 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:43:55,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:43:55,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:43:55,260 INFO L87 Difference]: Start difference. First operand 104 states and 224 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:55,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:43:55,289 INFO L93 Difference]: Finished difference Result 156 states and 340 transitions. [2022-03-01 17:43:55,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:43:55,289 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:43:55,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:43:55,290 INFO L225 Difference]: With dead ends: 156 [2022-03-01 17:43:55,290 INFO L226 Difference]: Without dead ends: 154 [2022-03-01 17:43:55,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:43:55,295 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 39 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:43:55,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 51 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:43:55,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-03-01 17:43:55,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 104. [2022-03-01 17:43:55,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.1650485436893203) internal successors, (223), 103 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:55,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 223 transitions. [2022-03-01 17:43:55,302 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 223 transitions. Word has length 16 [2022-03-01 17:43:55,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:43:55,302 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 223 transitions. [2022-03-01 17:43:55,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:55,302 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 223 transitions. [2022-03-01 17:43:55,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 17:43:55,303 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:43:55,303 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:43:55,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-01 17:43:55,303 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:43:55,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:43:55,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1511627156, now seen corresponding path program 1 times [2022-03-01 17:43:55,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:43:55,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213779505] [2022-03-01 17:43:55,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:43:55,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:43:55,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:43:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:43:55,420 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:43:55,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213779505] [2022-03-01 17:43:55,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213779505] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:43:55,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196703948] [2022-03-01 17:43:55,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:43:55,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:43:55,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:43:55,436 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) [2022-03-01 17:43:55,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-01 17:43:55,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:43:55,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:43:55,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:43:55,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:43:55,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:43:55,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:43:55,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196703948] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:43:55,625 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:43:55,625 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2022-03-01 17:43:55,625 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805298059] [2022-03-01 17:43:55,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:43:55,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:43:55,626 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:43:55,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:43:55,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:43:55,626 INFO L87 Difference]: Start difference. First operand 104 states and 223 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:55,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:43:55,746 INFO L93 Difference]: Finished difference Result 226 states and 505 transitions. [2022-03-01 17:43:55,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:43:55,747 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 17:43:55,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:43:55,748 INFO L225 Difference]: With dead ends: 226 [2022-03-01 17:43:55,748 INFO L226 Difference]: Without dead ends: 226 [2022-03-01 17:43:55,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:43:55,751 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 137 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:43:55,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 135 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:43:55,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-03-01 17:43:55,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 164. [2022-03-01 17:43:55,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.2024539877300615) internal successors, (359), 163 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:55,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 359 transitions. [2022-03-01 17:43:55,769 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 359 transitions. Word has length 21 [2022-03-01 17:43:55,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:43:55,769 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 359 transitions. [2022-03-01 17:43:55,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:55,770 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 359 transitions. [2022-03-01 17:43:55,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:43:55,771 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:43:55,771 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:43:55,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-01 17:43:55,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-03-01 17:43:55,987 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:43:55,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:43:55,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1098323698, now seen corresponding path program 2 times [2022-03-01 17:43:55,987 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:43:55,987 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017364620] [2022-03-01 17:43:55,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:43:55,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:43:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:43:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:43:56,008 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:43:56,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017364620] [2022-03-01 17:43:56,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017364620] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:43:56,009 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:43:56,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 17:43:56,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660796831] [2022-03-01 17:43:56,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:43:56,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:43:56,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:43:56,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:43:56,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:43:56,010 INFO L87 Difference]: Start difference. First operand 164 states and 359 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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) [2022-03-01 17:43:56,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:43:56,023 INFO L93 Difference]: Finished difference Result 266 states and 560 transitions. [2022-03-01 17:43:56,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 17:43:56,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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 [2022-03-01 17:43:56,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:43:56,025 INFO L225 Difference]: With dead ends: 266 [2022-03-01 17:43:56,025 INFO L226 Difference]: Without dead ends: 266 [2022-03-01 17:43:56,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:43:56,025 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 34 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:43:56,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 99 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:43:56,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-03-01 17:43:56,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 234. [2022-03-01 17:43:56,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.171673819742489) internal successors, (506), 233 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:56,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 506 transitions. [2022-03-01 17:43:56,031 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 506 transitions. Word has length 26 [2022-03-01 17:43:56,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:43:56,032 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 506 transitions. [2022-03-01 17:43:56,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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) [2022-03-01 17:43:56,032 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 506 transitions. [2022-03-01 17:43:56,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:43:56,033 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:43:56,033 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:43:56,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-01 17:43:56,033 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:43:56,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:43:56,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1941099218, now seen corresponding path program 1 times [2022-03-01 17:43:56,034 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:43:56,034 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962942805] [2022-03-01 17:43:56,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:43:56,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:43:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:43:56,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:43:56,085 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:43:56,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962942805] [2022-03-01 17:43:56,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962942805] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:43:56,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144734403] [2022-03-01 17:43:56,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:43:56,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:43:56,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:43:56,088 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) [2022-03-01 17:43:56,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-01 17:43:56,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:43:56,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:43:56,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:43:56,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:43:56,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:43:56,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:43:56,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144734403] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:43:56,226 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:43:56,227 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-01 17:43:56,227 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666875613] [2022-03-01 17:43:56,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:43:56,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-01 17:43:56,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:43:56,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-01 17:43:56,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:43:56,228 INFO L87 Difference]: Start difference. First operand 234 states and 506 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:56,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:43:56,307 INFO L93 Difference]: Finished difference Result 577 states and 1233 transitions. [2022-03-01 17:43:56,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:43:56,307 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:43:56,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:43:56,309 INFO L225 Difference]: With dead ends: 577 [2022-03-01 17:43:56,309 INFO L226 Difference]: Without dead ends: 577 [2022-03-01 17:43:56,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:43:56,310 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 138 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:43:56,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 132 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:43:56,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-03-01 17:43:56,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 457. [2022-03-01 17:43:56,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 2.2565789473684212) internal successors, (1029), 456 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:56,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1029 transitions. [2022-03-01 17:43:56,321 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1029 transitions. Word has length 26 [2022-03-01 17:43:56,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:43:56,321 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 1029 transitions. [2022-03-01 17:43:56,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:56,321 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1029 transitions. [2022-03-01 17:43:56,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:43:56,323 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:43:56,323 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:43:56,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-01 17:43:56,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:43:56,552 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:43:56,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:43:56,552 INFO L85 PathProgramCache]: Analyzing trace with hash 2033158722, now seen corresponding path program 2 times [2022-03-01 17:43:56,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:43:56,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660743826] [2022-03-01 17:43:56,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:43:56,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:43:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:43:56,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:43:56,586 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:43:56,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660743826] [2022-03-01 17:43:56,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660743826] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:43:56,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525211757] [2022-03-01 17:43:56,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:43:56,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:43:56,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:43:56,603 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) [2022-03-01 17:43:56,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-01 17:43:56,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:43:56,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:43:56,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:43:56,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:43:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:43:56,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:43:56,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:43:56,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525211757] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:43:56,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:43:56,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 7 [2022-03-01 17:43:56,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587730626] [2022-03-01 17:43:56,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:43:56,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-01 17:43:56,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:43:56,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-01 17:43:56,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:43:56,749 INFO L87 Difference]: Start difference. First operand 457 states and 1029 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:56,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:43:56,800 INFO L93 Difference]: Finished difference Result 791 states and 1738 transitions. [2022-03-01 17:43:56,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:43:56,800 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:43:56,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:43:56,803 INFO L225 Difference]: With dead ends: 791 [2022-03-01 17:43:56,803 INFO L226 Difference]: Without dead ends: 791 [2022-03-01 17:43:56,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:43:56,804 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 88 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:43:56,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 116 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:43:56,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-03-01 17:43:56,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 641. [2022-03-01 17:43:56,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 640 states have (on average 2.3171875) internal successors, (1483), 640 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:56,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1483 transitions. [2022-03-01 17:43:56,816 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1483 transitions. Word has length 26 [2022-03-01 17:43:56,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:43:56,816 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 1483 transitions. [2022-03-01 17:43:56,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:56,816 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1483 transitions. [2022-03-01 17:43:56,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:43:56,818 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:43:56,818 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:43:56,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-01 17:43:57,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:43:57,031 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:43:57,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:43:57,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1091752574, now seen corresponding path program 3 times [2022-03-01 17:43:57,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:43:57,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059864028] [2022-03-01 17:43:57,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:43:57,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:43:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:43:57,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:43:57,069 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:43:57,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059864028] [2022-03-01 17:43:57,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059864028] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:43:57,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033498514] [2022-03-01 17:43:57,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:43:57,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:43:57,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:43:57,072 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) [2022-03-01 17:43:57,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-01 17:43:57,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:43:57,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:43:57,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:43:57,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:43:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:43:57,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:43:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:43:57,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033498514] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:43:57,235 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:43:57,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 7 [2022-03-01 17:43:57,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529186767] [2022-03-01 17:43:57,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:43:57,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-01 17:43:57,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:43:57,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-01 17:43:57,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:43:57,236 INFO L87 Difference]: Start difference. First operand 641 states and 1483 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:57,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:43:57,292 INFO L93 Difference]: Finished difference Result 770 states and 1694 transitions. [2022-03-01 17:43:57,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:43:57,292 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:43:57,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:43:57,295 INFO L225 Difference]: With dead ends: 770 [2022-03-01 17:43:57,295 INFO L226 Difference]: Without dead ends: 766 [2022-03-01 17:43:57,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:43:57,296 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 109 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:43:57,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 113 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:43:57,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-03-01 17:43:57,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 641. [2022-03-01 17:43:57,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 640 states have (on average 2.3125) internal successors, (1480), 640 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:57,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1480 transitions. [2022-03-01 17:43:57,308 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1480 transitions. Word has length 26 [2022-03-01 17:43:57,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:43:57,308 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 1480 transitions. [2022-03-01 17:43:57,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:57,308 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1480 transitions. [2022-03-01 17:43:57,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:43:57,309 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:43:57,309 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:43:57,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-01 17:43:57,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-01 17:43:57,523 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:43:57,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:43:57,524 INFO L85 PathProgramCache]: Analyzing trace with hash 666474856, now seen corresponding path program 4 times [2022-03-01 17:43:57,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:43:57,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061154269] [2022-03-01 17:43:57,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:43:57,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:43:57,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:43:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:43:57,554 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:43:57,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061154269] [2022-03-01 17:43:57,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061154269] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:43:57,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816607284] [2022-03-01 17:43:57,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:43:57,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:43:57,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:43:57,555 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) [2022-03-01 17:43:57,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-01 17:43:57,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:43:57,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:43:57,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:43:57,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:43:57,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:43:57,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:43:57,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:43:57,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816607284] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:43:57,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:43:57,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-01 17:43:57,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26330865] [2022-03-01 17:43:57,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:43:57,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-01 17:43:57,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:43:57,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-01 17:43:57,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:43:57,674 INFO L87 Difference]: Start difference. First operand 641 states and 1480 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:57,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:43:57,745 INFO L93 Difference]: Finished difference Result 776 states and 1698 transitions. [2022-03-01 17:43:57,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:43:57,746 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:43:57,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:43:57,748 INFO L225 Difference]: With dead ends: 776 [2022-03-01 17:43:57,748 INFO L226 Difference]: Without dead ends: 742 [2022-03-01 17:43:57,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:43:57,749 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 102 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:43:57,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 138 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:43:57,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2022-03-01 17:43:57,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 654. [2022-03-01 17:43:57,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.2833078101071975) internal successors, (1491), 653 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:57,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1491 transitions. [2022-03-01 17:43:57,760 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1491 transitions. Word has length 26 [2022-03-01 17:43:57,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:43:57,760 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 1491 transitions. [2022-03-01 17:43:57,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:57,760 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1491 transitions. [2022-03-01 17:43:57,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 17:43:57,761 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:43:57,761 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:43:57,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-01 17:43:57,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:43:57,980 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:43:57,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:43:57,980 INFO L85 PathProgramCache]: Analyzing trace with hash 139454239, now seen corresponding path program 5 times [2022-03-01 17:43:57,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:43:57,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115101688] [2022-03-01 17:43:57,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:43:57,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:43:57,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:43:57,997 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:43:57,998 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:43:57,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115101688] [2022-03-01 17:43:57,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115101688] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:43:57,998 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:43:57,998 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 17:43:57,998 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370189028] [2022-03-01 17:43:57,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:43:57,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:43:57,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:43:57,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:43:57,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:43:57,999 INFO L87 Difference]: Start difference. First operand 654 states and 1491 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:58,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:43:58,013 INFO L93 Difference]: Finished difference Result 1106 states and 2391 transitions. [2022-03-01 17:43:58,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 17:43:58,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-01 17:43:58,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:43:58,016 INFO L225 Difference]: With dead ends: 1106 [2022-03-01 17:43:58,017 INFO L226 Difference]: Without dead ends: 1106 [2022-03-01 17:43:58,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:43:58,017 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 33 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:43:58,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 99 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:43:58,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2022-03-01 17:43:58,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1035. [2022-03-01 17:43:58,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 1034 states have (on average 2.2030947775628626) internal successors, (2278), 1034 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:58,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 2278 transitions. [2022-03-01 17:43:58,038 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 2278 transitions. Word has length 31 [2022-03-01 17:43:58,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:43:58,041 INFO L470 AbstractCegarLoop]: Abstraction has 1035 states and 2278 transitions. [2022-03-01 17:43:58,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:58,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 2278 transitions. [2022-03-01 17:43:58,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 17:43:58,044 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:43:58,044 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:43:58,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-01 17:43:58,044 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:43:58,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:43:58,044 INFO L85 PathProgramCache]: Analyzing trace with hash 204098367, now seen corresponding path program 1 times [2022-03-01 17:43:58,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:43:58,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305460875] [2022-03-01 17:43:58,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:43:58,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:43:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:43:58,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:43:58,084 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:43:58,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305460875] [2022-03-01 17:43:58,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305460875] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:43:58,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499944938] [2022-03-01 17:43:58,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:43:58,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:43:58,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:43:58,085 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) [2022-03-01 17:43:58,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-01 17:43:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:43:58,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:43:58,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:43:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:43:58,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:43:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:43:58,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499944938] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:43:58,307 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:43:58,307 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-03-01 17:43:58,307 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027153562] [2022-03-01 17:43:58,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:43:58,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:43:58,308 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:43:58,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:43:58,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:43:58,308 INFO L87 Difference]: Start difference. First operand 1035 states and 2278 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) [2022-03-01 17:43:58,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:43:58,341 INFO L93 Difference]: Finished difference Result 1734 states and 3766 transitions. [2022-03-01 17:43:58,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:43:58,342 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-01 17:43:58,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:43:58,348 INFO L225 Difference]: With dead ends: 1734 [2022-03-01 17:43:58,348 INFO L226 Difference]: Without dead ends: 1715 [2022-03-01 17:43:58,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:43:58,350 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 29 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:43:58,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 140 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:43:58,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2022-03-01 17:43:58,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1574. [2022-03-01 17:43:58,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1574 states, 1573 states have (on average 2.2148760330578514) internal successors, (3484), 1573 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:58,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 3484 transitions. [2022-03-01 17:43:58,377 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 3484 transitions. Word has length 31 [2022-03-01 17:43:58,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:43:58,377 INFO L470 AbstractCegarLoop]: Abstraction has 1574 states and 3484 transitions. [2022-03-01 17:43:58,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) [2022-03-01 17:43:58,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 3484 transitions. [2022-03-01 17:43:58,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 17:43:58,379 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:43:58,379 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:43:58,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-01 17:43:58,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:43:58,598 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:43:58,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:43:58,598 INFO L85 PathProgramCache]: Analyzing trace with hash 938415871, now seen corresponding path program 2 times [2022-03-01 17:43:58,598 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:43:58,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492884499] [2022-03-01 17:43:58,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:43:58,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:43:58,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:43:58,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:43:58,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:43:58,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492884499] [2022-03-01 17:43:58,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492884499] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:43:58,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815382904] [2022-03-01 17:43:58,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:43:58,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:43:58,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:43:58,635 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) [2022-03-01 17:43:58,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-01 17:43:58,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:43:58,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:43:58,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:43:58,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:43:58,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:43:58,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:43:58,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:43:58,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815382904] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:43:58,840 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:43:58,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-03-01 17:43:58,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060930156] [2022-03-01 17:43:58,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:43:58,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:43:58,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:43:58,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:43:58,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:43:58,841 INFO L87 Difference]: Start difference. First operand 1574 states and 3484 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) [2022-03-01 17:43:58,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:43:58,875 INFO L93 Difference]: Finished difference Result 2699 states and 5894 transitions. [2022-03-01 17:43:58,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:43:58,876 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-01 17:43:58,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:43:58,883 INFO L225 Difference]: With dead ends: 2699 [2022-03-01 17:43:58,883 INFO L226 Difference]: Without dead ends: 2680 [2022-03-01 17:43:58,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:43:58,884 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 30 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:43:58,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 158 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:43:58,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2022-03-01 17:43:58,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2424. [2022-03-01 17:43:58,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2424 states, 2423 states have (on average 2.23607098638052) internal successors, (5418), 2423 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:58,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2424 states to 2424 states and 5418 transitions. [2022-03-01 17:43:58,926 INFO L78 Accepts]: Start accepts. Automaton has 2424 states and 5418 transitions. Word has length 31 [2022-03-01 17:43:58,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:43:58,926 INFO L470 AbstractCegarLoop]: Abstraction has 2424 states and 5418 transitions. [2022-03-01 17:43:58,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) [2022-03-01 17:43:58,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2424 states and 5418 transitions. [2022-03-01 17:43:58,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 17:43:58,929 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:43:58,929 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:43:58,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-01 17:43:59,143 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,SelfDestructingSolverStorable13 [2022-03-01 17:43:59,144 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:43:59,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:43:59,144 INFO L85 PathProgramCache]: Analyzing trace with hash 564205335, now seen corresponding path program 3 times [2022-03-01 17:43:59,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:43:59,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694763252] [2022-03-01 17:43:59,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:43:59,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:43:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:43:59,182 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:43:59,182 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:43:59,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694763252] [2022-03-01 17:43:59,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694763252] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:43:59,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825554284] [2022-03-01 17:43:59,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:43:59,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:43:59,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:43:59,196 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) [2022-03-01 17:43:59,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-01 17:43:59,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:43:59,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:43:59,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:43:59,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:43:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:43:59,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:43:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:43:59,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825554284] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:43:59,376 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:43:59,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-03-01 17:43:59,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803411780] [2022-03-01 17:43:59,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:43:59,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:43:59,376 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:43:59,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:43:59,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:43:59,376 INFO L87 Difference]: Start difference. First operand 2424 states and 5418 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2022-03-01 17:43:59,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:43:59,459 INFO L93 Difference]: Finished difference Result 4273 states and 9405 transitions. [2022-03-01 17:43:59,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 17:43:59,460 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-01 17:43:59,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:43:59,472 INFO L225 Difference]: With dead ends: 4273 [2022-03-01 17:43:59,472 INFO L226 Difference]: Without dead ends: 4248 [2022-03-01 17:43:59,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:43:59,472 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 49 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:43:59,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 243 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:43:59,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4248 states. [2022-03-01 17:43:59,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4248 to 3431. [2022-03-01 17:43:59,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3431 states, 3430 states have (on average 2.2504373177842565) internal successors, (7719), 3430 states have internal predecessors, (7719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:43:59,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3431 states to 3431 states and 7719 transitions. [2022-03-01 17:43:59,533 INFO L78 Accepts]: Start accepts. Automaton has 3431 states and 7719 transitions. Word has length 31 [2022-03-01 17:43:59,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:43:59,533 INFO L470 AbstractCegarLoop]: Abstraction has 3431 states and 7719 transitions. [2022-03-01 17:43:59,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2022-03-01 17:43:59,533 INFO L276 IsEmpty]: Start isEmpty. Operand 3431 states and 7719 transitions. [2022-03-01 17:43:59,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 17:43:59,538 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:43:59,538 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:43:59,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-01 17:43:59,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-01 17:43:59,752 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:43:59,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:43:59,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1752857303, now seen corresponding path program 4 times [2022-03-01 17:43:59,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:43:59,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810823224] [2022-03-01 17:43:59,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:43:59,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:43:59,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:43:59,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:43:59,794 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:43:59,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810823224] [2022-03-01 17:43:59,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810823224] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:43:59,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284628542] [2022-03-01 17:43:59,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:43:59,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:43:59,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:43:59,795 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) [2022-03-01 17:43:59,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-01 17:43:59,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:43:59,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:43:59,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:43:59,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:43:59,910 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:43:59,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:43:59,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:43:59,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284628542] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:43:59,994 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:43:59,994 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-03-01 17:43:59,994 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010772490] [2022-03-01 17:43:59,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:43:59,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:43:59,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:43:59,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:43:59,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:43:59,995 INFO L87 Difference]: Start difference. First operand 3431 states and 7719 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2022-03-01 17:44:00,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:44:00,053 INFO L93 Difference]: Finished difference Result 4375 states and 9644 transitions. [2022-03-01 17:44:00,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 17:44:00,054 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-01 17:44:00,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:44:00,066 INFO L225 Difference]: With dead ends: 4375 [2022-03-01 17:44:00,066 INFO L226 Difference]: Without dead ends: 4356 [2022-03-01 17:44:00,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:44:00,067 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 46 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:44:00,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 258 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:44:00,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4356 states. [2022-03-01 17:44:00,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4356 to 3567. [2022-03-01 17:44:00,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3567 states, 3566 states have (on average 2.2543466068424003) internal successors, (8039), 3566 states have internal predecessors, (8039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:00,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3567 states to 3567 states and 8039 transitions. [2022-03-01 17:44:00,136 INFO L78 Accepts]: Start accepts. Automaton has 3567 states and 8039 transitions. Word has length 31 [2022-03-01 17:44:00,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:44:00,136 INFO L470 AbstractCegarLoop]: Abstraction has 3567 states and 8039 transitions. [2022-03-01 17:44:00,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2022-03-01 17:44:00,136 INFO L276 IsEmpty]: Start isEmpty. Operand 3567 states and 8039 transitions. [2022-03-01 17:44:00,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 17:44:00,141 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:44:00,141 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:44:00,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-01 17:44:00,357 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,SelfDestructingSolverStorable15 [2022-03-01 17:44:00,357 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:44:00,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:44:00,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1753562787, now seen corresponding path program 5 times [2022-03-01 17:44:00,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:44:00,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722187116] [2022-03-01 17:44:00,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:44:00,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:44:00,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:44:00,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:44:00,392 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:44:00,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722187116] [2022-03-01 17:44:00,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722187116] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:44:00,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896398778] [2022-03-01 17:44:00,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:44:00,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:00,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:44:00,394 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) [2022-03-01 17:44:00,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-01 17:44:00,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:44:00,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:44:00,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:44:00,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:44:00,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:44:00,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:44:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:44:00,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896398778] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:44:00,623 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:44:00,623 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-03-01 17:44:00,623 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284381203] [2022-03-01 17:44:00,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:44:00,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:44:00,623 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:44:00,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:44:00,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:44:00,624 INFO L87 Difference]: Start difference. First operand 3567 states and 8039 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) [2022-03-01 17:44:00,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:44:00,671 INFO L93 Difference]: Finished difference Result 4194 states and 9351 transitions. [2022-03-01 17:44:00,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:44:00,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-01 17:44:00,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:44:00,682 INFO L225 Difference]: With dead ends: 4194 [2022-03-01 17:44:00,682 INFO L226 Difference]: Without dead ends: 4175 [2022-03-01 17:44:00,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:44:00,683 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 29 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:44:00,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 170 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:44:00,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4175 states. [2022-03-01 17:44:00,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4175 to 3956. [2022-03-01 17:44:00,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3956 states, 3955 states have (on average 2.260429835651075) internal successors, (8940), 3955 states have internal predecessors, (8940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:00,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3956 states to 3956 states and 8940 transitions. [2022-03-01 17:44:00,750 INFO L78 Accepts]: Start accepts. Automaton has 3956 states and 8940 transitions. Word has length 31 [2022-03-01 17:44:00,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:44:00,751 INFO L470 AbstractCegarLoop]: Abstraction has 3956 states and 8940 transitions. [2022-03-01 17:44:00,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) [2022-03-01 17:44:00,751 INFO L276 IsEmpty]: Start isEmpty. Operand 3956 states and 8940 transitions. [2022-03-01 17:44:00,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 17:44:00,756 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:44:00,757 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:44:00,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-01 17:44:00,971 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,SelfDestructingSolverStorable16 [2022-03-01 17:44:00,972 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:44:00,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:44:00,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1405888233, now seen corresponding path program 6 times [2022-03-01 17:44:00,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:44:00,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979385109] [2022-03-01 17:44:00,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:44:00,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:44:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:44:01,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:01,012 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:44:01,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979385109] [2022-03-01 17:44:01,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979385109] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:44:01,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114639970] [2022-03-01 17:44:01,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:44:01,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:01,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:44:01,013 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) [2022-03-01 17:44:01,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-01 17:44:01,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:44:01,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:44:01,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:44:01,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:44:01,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:01,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:44:01,209 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:01,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114639970] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:44:01,209 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:44:01,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-03-01 17:44:01,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012407349] [2022-03-01 17:44:01,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:44:01,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:44:01,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:44:01,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:44:01,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:44:01,210 INFO L87 Difference]: Start difference. First operand 3956 states and 8940 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2022-03-01 17:44:01,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:44:01,271 INFO L93 Difference]: Finished difference Result 5381 states and 11942 transitions. [2022-03-01 17:44:01,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 17:44:01,271 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-01 17:44:01,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:44:01,280 INFO L225 Difference]: With dead ends: 5381 [2022-03-01 17:44:01,280 INFO L226 Difference]: Without dead ends: 5362 [2022-03-01 17:44:01,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:44:01,281 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 46 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:44:01,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 258 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:44:01,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5362 states. [2022-03-01 17:44:01,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5362 to 4122. [2022-03-01 17:44:01,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4122 states, 4121 states have (on average 2.2630429507401115) internal successors, (9326), 4121 states have internal predecessors, (9326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:01,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4122 states to 4122 states and 9326 transitions. [2022-03-01 17:44:01,377 INFO L78 Accepts]: Start accepts. Automaton has 4122 states and 9326 transitions. Word has length 31 [2022-03-01 17:44:01,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:44:01,377 INFO L470 AbstractCegarLoop]: Abstraction has 4122 states and 9326 transitions. [2022-03-01 17:44:01,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2022-03-01 17:44:01,378 INFO L276 IsEmpty]: Start isEmpty. Operand 4122 states and 9326 transitions. [2022-03-01 17:44:01,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 17:44:01,382 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:44:01,383 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:44:01,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-01 17:44:01,600 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,SelfDestructingSolverStorable17 [2022-03-01 17:44:01,601 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:44:01,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:44:01,601 INFO L85 PathProgramCache]: Analyzing trace with hash -217236265, now seen corresponding path program 7 times [2022-03-01 17:44:01,601 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:44:01,601 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093671026] [2022-03-01 17:44:01,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:44:01,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:44:01,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:44:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:01,637 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:44:01,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093671026] [2022-03-01 17:44:01,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093671026] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:44:01,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612191042] [2022-03-01 17:44:01,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:44:01,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:01,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:44:01,638 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) [2022-03-01 17:44:01,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:44:01,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:44:01,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:44:01,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-01 17:44:01,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:01,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:44:01,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:01,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612191042] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:44:01,828 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:44:01,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-03-01 17:44:01,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253752991] [2022-03-01 17:44:01,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:44:01,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:44:01,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:44:01,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:44:01,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:44:01,829 INFO L87 Difference]: Start difference. First operand 4122 states and 9326 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2022-03-01 17:44:01,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:44:01,887 INFO L93 Difference]: Finished difference Result 5455 states and 12068 transitions. [2022-03-01 17:44:01,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 17:44:01,887 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-01 17:44:01,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:44:01,897 INFO L225 Difference]: With dead ends: 5455 [2022-03-01 17:44:01,897 INFO L226 Difference]: Without dead ends: 5436 [2022-03-01 17:44:01,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:44:01,897 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 49 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:44:01,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 259 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:44:01,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5436 states. [2022-03-01 17:44:01,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5436 to 2909. [2022-03-01 17:44:01,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2909 states, 2908 states have (on average 2.2427785419532325) internal successors, (6522), 2908 states have internal predecessors, (6522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:01,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2909 states to 2909 states and 6522 transitions. [2022-03-01 17:44:01,955 INFO L78 Accepts]: Start accepts. Automaton has 2909 states and 6522 transitions. Word has length 31 [2022-03-01 17:44:01,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:44:01,955 INFO L470 AbstractCegarLoop]: Abstraction has 2909 states and 6522 transitions. [2022-03-01 17:44:01,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2022-03-01 17:44:01,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2909 states and 6522 transitions. [2022-03-01 17:44:01,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:44:01,959 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:44:01,960 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:44:01,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-01 17:44:02,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:02,176 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:44:02,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:44:02,177 INFO L85 PathProgramCache]: Analyzing trace with hash 580181725, now seen corresponding path program 8 times [2022-03-01 17:44:02,177 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:44:02,177 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928387182] [2022-03-01 17:44:02,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:44:02,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:44:02,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:44:02,207 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:02,207 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:44:02,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928387182] [2022-03-01 17:44:02,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928387182] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:44:02,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877663247] [2022-03-01 17:44:02,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:44:02,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:02,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:44:02,216 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) [2022-03-01 17:44:02,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-01 17:44:02,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:44:02,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:44:02,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:44:02,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:44:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:02,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:44:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:02,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877663247] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:44:02,387 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:44:02,387 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:44:02,387 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860268413] [2022-03-01 17:44:02,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:44:02,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:44:02,387 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:44:02,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:44:02,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:44:02,388 INFO L87 Difference]: Start difference. First operand 2909 states and 6522 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:02,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:44:02,514 INFO L93 Difference]: Finished difference Result 5757 states and 12535 transitions. [2022-03-01 17:44:02,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:44:02,514 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:44:02,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:44:02,524 INFO L225 Difference]: With dead ends: 5757 [2022-03-01 17:44:02,524 INFO L226 Difference]: Without dead ends: 5757 [2022-03-01 17:44:02,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:44:02,525 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 155 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:44:02,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 238 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:44:02,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5757 states. [2022-03-01 17:44:02,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5757 to 3879. [2022-03-01 17:44:02,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3879 states, 3878 states have (on average 2.2449716348633317) internal successors, (8706), 3878 states have internal predecessors, (8706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:02,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3879 states to 3879 states and 8706 transitions. [2022-03-01 17:44:02,604 INFO L78 Accepts]: Start accepts. Automaton has 3879 states and 8706 transitions. Word has length 36 [2022-03-01 17:44:02,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:44:02,604 INFO L470 AbstractCegarLoop]: Abstraction has 3879 states and 8706 transitions. [2022-03-01 17:44:02,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:02,604 INFO L276 IsEmpty]: Start isEmpty. Operand 3879 states and 8706 transitions. [2022-03-01 17:44:02,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:44:02,609 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:44:02,609 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:44:02,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-01 17:44:02,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:02,818 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:44:02,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:44:02,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1581012270, now seen corresponding path program 9 times [2022-03-01 17:44:02,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:44:02,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511322253] [2022-03-01 17:44:02,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:44:02,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:44:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:44:02,857 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:02,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:44:02,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511322253] [2022-03-01 17:44:02,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511322253] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:44:02,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792033550] [2022-03-01 17:44:02,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:44:02,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:02,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:44:02,859 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) [2022-03-01 17:44:02,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-01 17:44:02,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:44:02,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:44:02,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:44:02,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:44:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:02,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:44:03,027 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:03,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792033550] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:44:03,027 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:44:03,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:44:03,027 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778220727] [2022-03-01 17:44:03,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:44:03,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:44:03,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:44:03,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:44:03,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:44:03,028 INFO L87 Difference]: Start difference. First operand 3879 states and 8706 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:03,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:44:03,131 INFO L93 Difference]: Finished difference Result 7174 states and 15955 transitions. [2022-03-01 17:44:03,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:44:03,139 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:44:03,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:44:03,152 INFO L225 Difference]: With dead ends: 7174 [2022-03-01 17:44:03,152 INFO L226 Difference]: Without dead ends: 7076 [2022-03-01 17:44:03,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:44:03,152 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 238 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:44:03,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 202 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:44:03,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7076 states. [2022-03-01 17:44:03,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7076 to 6656. [2022-03-01 17:44:03,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6656 states, 6655 states have (on average 2.2516904583020287) internal successors, (14985), 6655 states have internal predecessors, (14985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:03,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6656 states to 6656 states and 14985 transitions. [2022-03-01 17:44:03,247 INFO L78 Accepts]: Start accepts. Automaton has 6656 states and 14985 transitions. Word has length 36 [2022-03-01 17:44:03,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:44:03,247 INFO L470 AbstractCegarLoop]: Abstraction has 6656 states and 14985 transitions. [2022-03-01 17:44:03,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:03,247 INFO L276 IsEmpty]: Start isEmpty. Operand 6656 states and 14985 transitions. [2022-03-01 17:44:03,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:44:03,255 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:44:03,255 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:44:03,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-01 17:44:03,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:03,471 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:44:03,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:44:03,472 INFO L85 PathProgramCache]: Analyzing trace with hash -784153882, now seen corresponding path program 10 times [2022-03-01 17:44:03,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:44:03,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735492313] [2022-03-01 17:44:03,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:44:03,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:44:03,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:44:03,499 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:03,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:44:03,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735492313] [2022-03-01 17:44:03,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735492313] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:44:03,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594676457] [2022-03-01 17:44:03,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:44:03,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:03,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:44:03,508 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) [2022-03-01 17:44:03,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-01 17:44:03,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:44:03,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:44:03,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:44:03,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:44:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:03,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:44:03,690 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:03,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594676457] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:44:03,690 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:44:03,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 9 [2022-03-01 17:44:03,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268551584] [2022-03-01 17:44:03,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:44:03,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:44:03,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:44:03,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:44:03,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:44:03,692 INFO L87 Difference]: Start difference. First operand 6656 states and 14985 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:03,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:44:03,776 INFO L93 Difference]: Finished difference Result 6988 states and 15417 transitions. [2022-03-01 17:44:03,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:44:03,776 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:44:03,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:44:03,788 INFO L225 Difference]: With dead ends: 6988 [2022-03-01 17:44:03,789 INFO L226 Difference]: Without dead ends: 6988 [2022-03-01 17:44:03,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:44:03,790 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 163 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:44:03,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 138 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:44:03,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6988 states. [2022-03-01 17:44:03,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6988 to 6596. [2022-03-01 17:44:03,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6596 states, 6595 states have (on average 2.2351781652767246) internal successors, (14741), 6595 states have internal predecessors, (14741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:03,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6596 states to 6596 states and 14741 transitions. [2022-03-01 17:44:03,879 INFO L78 Accepts]: Start accepts. Automaton has 6596 states and 14741 transitions. Word has length 36 [2022-03-01 17:44:03,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:44:03,880 INFO L470 AbstractCegarLoop]: Abstraction has 6596 states and 14741 transitions. [2022-03-01 17:44:03,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:03,880 INFO L276 IsEmpty]: Start isEmpty. Operand 6596 states and 14741 transitions. [2022-03-01 17:44:03,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:44:03,887 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:44:03,888 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:44:03,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-01 17:44:04,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-01 17:44:04,104 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:44:04,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:44:04,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1547340963, now seen corresponding path program 11 times [2022-03-01 17:44:04,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:44:04,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878733345] [2022-03-01 17:44:04,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:44:04,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:44:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:44:04,141 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:04,141 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:44:04,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878733345] [2022-03-01 17:44:04,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878733345] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:44:04,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355420468] [2022-03-01 17:44:04,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:44:04,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:04,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:44:04,143 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) [2022-03-01 17:44:04,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-01 17:44:04,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:44:04,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:44:04,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:44:04,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:44:04,216 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:04,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:44:04,322 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:04,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355420468] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:44:04,322 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:44:04,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 9 [2022-03-01 17:44:04,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377219179] [2022-03-01 17:44:04,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:44:04,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:44:04,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:44:04,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:44:04,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:44:04,325 INFO L87 Difference]: Start difference. First operand 6596 states and 14741 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:04,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:44:04,506 INFO L93 Difference]: Finished difference Result 11272 states and 24886 transitions. [2022-03-01 17:44:04,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:44:04,506 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:44:04,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:44:04,558 INFO L225 Difference]: With dead ends: 11272 [2022-03-01 17:44:04,558 INFO L226 Difference]: Without dead ends: 11196 [2022-03-01 17:44:04,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:44:04,558 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 218 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:44:04,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 335 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:44:04,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11196 states. [2022-03-01 17:44:04,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11196 to 9644. [2022-03-01 17:44:04,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9644 states, 9643 states have (on average 2.2686923156693974) internal successors, (21877), 9643 states have internal predecessors, (21877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:04,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9644 states to 9644 states and 21877 transitions. [2022-03-01 17:44:04,709 INFO L78 Accepts]: Start accepts. Automaton has 9644 states and 21877 transitions. Word has length 36 [2022-03-01 17:44:04,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:44:04,710 INFO L470 AbstractCegarLoop]: Abstraction has 9644 states and 21877 transitions. [2022-03-01 17:44:04,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:04,710 INFO L276 IsEmpty]: Start isEmpty. Operand 9644 states and 21877 transitions. [2022-03-01 17:44:04,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:44:04,719 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:44:04,719 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:44:04,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-01 17:44:04,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:04,923 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:44:04,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:44:04,924 INFO L85 PathProgramCache]: Analyzing trace with hash -429715939, now seen corresponding path program 12 times [2022-03-01 17:44:04,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:44:04,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814457992] [2022-03-01 17:44:04,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:44:04,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:44:04,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:44:04,946 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:44:04,947 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:44:04,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814457992] [2022-03-01 17:44:04,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814457992] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:44:04,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623904598] [2022-03-01 17:44:04,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:44:04,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:04,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:44:04,964 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) [2022-03-01 17:44:04,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-01 17:44:04,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:44:04,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:44:04,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:44:04,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:44:05,037 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:44:05,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:44:05,137 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:44:05,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623904598] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:44:05,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:44:05,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 9 [2022-03-01 17:44:05,138 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147589112] [2022-03-01 17:44:05,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:44:05,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:44:05,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:44:05,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:44:05,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:44:05,138 INFO L87 Difference]: Start difference. First operand 9644 states and 21877 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:05,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:44:05,238 INFO L93 Difference]: Finished difference Result 13376 states and 29728 transitions. [2022-03-01 17:44:05,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:44:05,239 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:44:05,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:44:05,264 INFO L225 Difference]: With dead ends: 13376 [2022-03-01 17:44:05,264 INFO L226 Difference]: Without dead ends: 13376 [2022-03-01 17:44:05,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:44:05,265 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 163 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:44:05,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 135 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:44:05,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13376 states. [2022-03-01 17:44:05,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13376 to 10756. [2022-03-01 17:44:05,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10756 states, 10755 states have (on average 2.2546722454672246) internal successors, (24249), 10755 states have internal predecessors, (24249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:05,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10756 states to 10756 states and 24249 transitions. [2022-03-01 17:44:05,463 INFO L78 Accepts]: Start accepts. Automaton has 10756 states and 24249 transitions. Word has length 36 [2022-03-01 17:44:05,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:44:05,463 INFO L470 AbstractCegarLoop]: Abstraction has 10756 states and 24249 transitions. [2022-03-01 17:44:05,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:05,463 INFO L276 IsEmpty]: Start isEmpty. Operand 10756 states and 24249 transitions. [2022-03-01 17:44:05,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:44:05,471 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:44:05,471 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:44:05,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-01 17:44:05,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:05,687 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:44:05,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:44:05,688 INFO L85 PathProgramCache]: Analyzing trace with hash 565238930, now seen corresponding path program 13 times [2022-03-01 17:44:05,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:44:05,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024353147] [2022-03-01 17:44:05,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:44:05,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:44:05,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:44:05,717 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:44:05,717 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:44:05,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024353147] [2022-03-01 17:44:05,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024353147] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:44:05,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043801812] [2022-03-01 17:44:05,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:44:05,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:05,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:44:05,719 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) [2022-03-01 17:44:05,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-01 17:44:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:44:05,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:44:05,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:44:05,791 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:44:05,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:44:05,913 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:44:05,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043801812] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:44:05,914 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:44:05,914 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 9 [2022-03-01 17:44:05,914 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824060945] [2022-03-01 17:44:05,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:44:05,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:44:05,914 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:44:05,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:44:05,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:44:05,915 INFO L87 Difference]: Start difference. First operand 10756 states and 24249 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:06,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:44:06,071 INFO L93 Difference]: Finished difference Result 13267 states and 29560 transitions. [2022-03-01 17:44:06,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:44:06,071 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:44:06,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:44:06,093 INFO L225 Difference]: With dead ends: 13267 [2022-03-01 17:44:06,093 INFO L226 Difference]: Without dead ends: 13255 [2022-03-01 17:44:06,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:44:06,094 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 188 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:44:06,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 203 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:44:06,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13255 states. [2022-03-01 17:44:06,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13255 to 12816. [2022-03-01 17:44:06,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12816 states, 12815 states have (on average 2.247132266874756) internal successors, (28797), 12815 states have internal predecessors, (28797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:06,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12816 states to 12816 states and 28797 transitions. [2022-03-01 17:44:06,346 INFO L78 Accepts]: Start accepts. Automaton has 12816 states and 28797 transitions. Word has length 36 [2022-03-01 17:44:06,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:44:06,346 INFO L470 AbstractCegarLoop]: Abstraction has 12816 states and 28797 transitions. [2022-03-01 17:44:06,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:06,347 INFO L276 IsEmpty]: Start isEmpty. Operand 12816 states and 28797 transitions. [2022-03-01 17:44:06,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:44:06,355 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:44:06,355 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:44:06,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-01 17:44:06,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:06,571 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:44:06,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:44:06,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1839626470, now seen corresponding path program 14 times [2022-03-01 17:44:06,571 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:44:06,571 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227834758] [2022-03-01 17:44:06,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:44:06,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:44:06,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:44:06,598 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:44:06,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:44:06,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227834758] [2022-03-01 17:44:06,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227834758] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:44:06,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516216707] [2022-03-01 17:44:06,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:44:06,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:06,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:44:06,600 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) [2022-03-01 17:44:06,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-01 17:44:06,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:44:06,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:44:06,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:44:06,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:44:06,677 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:44:06,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:44:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:06,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516216707] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:44:06,786 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:44:06,786 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 9 [2022-03-01 17:44:06,786 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262303673] [2022-03-01 17:44:06,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:44:06,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:44:06,786 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:44:06,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:44:06,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:44:06,787 INFO L87 Difference]: Start difference. First operand 12816 states and 28797 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:06,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:44:06,976 INFO L93 Difference]: Finished difference Result 13555 states and 30066 transitions. [2022-03-01 17:44:06,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:44:06,977 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:44:06,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:44:06,995 INFO L225 Difference]: With dead ends: 13555 [2022-03-01 17:44:06,995 INFO L226 Difference]: Without dead ends: 13553 [2022-03-01 17:44:06,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:44:06,996 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 209 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:44:06,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 171 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:44:07,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13553 states. [2022-03-01 17:44:07,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13553 to 12936. [2022-03-01 17:44:07,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12936 states, 12935 states have (on average 2.238345574023966) internal successors, (28953), 12935 states have internal predecessors, (28953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:07,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12936 states to 12936 states and 28953 transitions. [2022-03-01 17:44:07,209 INFO L78 Accepts]: Start accepts. Automaton has 12936 states and 28953 transitions. Word has length 36 [2022-03-01 17:44:07,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:44:07,209 INFO L470 AbstractCegarLoop]: Abstraction has 12936 states and 28953 transitions. [2022-03-01 17:44:07,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:07,210 INFO L276 IsEmpty]: Start isEmpty. Operand 12936 states and 28953 transitions. [2022-03-01 17:44:07,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:44:07,219 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:44:07,219 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:44:07,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-01 17:44:07,435 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,SelfDestructingSolverStorable25 [2022-03-01 17:44:07,435 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:44:07,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:44:07,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1076439389, now seen corresponding path program 15 times [2022-03-01 17:44:07,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:44:07,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331834980] [2022-03-01 17:44:07,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:44:07,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:44:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:44:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:44:07,466 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:44:07,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331834980] [2022-03-01 17:44:07,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331834980] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:44:07,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091550751] [2022-03-01 17:44:07,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:44:07,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:07,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:44:07,467 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) [2022-03-01 17:44:07,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-01 17:44:07,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:44:07,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:44:07,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:44:07,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:44:07,566 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 17:44:07,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:44:07,695 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-01 17:44:07,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091550751] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:44:07,696 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:44:07,696 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 14 [2022-03-01 17:44:07,696 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863638300] [2022-03-01 17:44:07,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:44:07,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:44:07,696 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:44:07,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:44:07,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:44:07,697 INFO L87 Difference]: Start difference. First operand 12936 states and 28953 transitions. Second operand has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 14 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) [2022-03-01 17:44:08,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:44:08,275 INFO L93 Difference]: Finished difference Result 19743 states and 41291 transitions. [2022-03-01 17:44:08,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 17:44:08,276 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 14 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) Word has length 36 [2022-03-01 17:44:08,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:44:08,302 INFO L225 Difference]: With dead ends: 19743 [2022-03-01 17:44:08,302 INFO L226 Difference]: Without dead ends: 19411 [2022-03-01 17:44:08,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=429, Invalid=2327, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:44:08,304 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1077 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:44:08,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1077 Valid, 658 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:44:08,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19411 states. [2022-03-01 17:44:08,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19411 to 10350. [2022-03-01 17:44:08,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10350 states, 10349 states have (on average 2.101362450478307) internal successors, (21747), 10349 states have internal predecessors, (21747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:08,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10350 states to 10350 states and 21747 transitions. [2022-03-01 17:44:08,470 INFO L78 Accepts]: Start accepts. Automaton has 10350 states and 21747 transitions. Word has length 36 [2022-03-01 17:44:08,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:44:08,471 INFO L470 AbstractCegarLoop]: Abstraction has 10350 states and 21747 transitions. [2022-03-01 17:44:08,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 14 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) [2022-03-01 17:44:08,471 INFO L276 IsEmpty]: Start isEmpty. Operand 10350 states and 21747 transitions. [2022-03-01 17:44:08,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:44:08,477 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:44:08,477 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:44:08,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-01 17:44:08,689 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,SelfDestructingSolverStorable26 [2022-03-01 17:44:08,689 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:44:08,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:44:08,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1260168476, now seen corresponding path program 16 times [2022-03-01 17:44:08,689 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:44:08,689 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272361437] [2022-03-01 17:44:08,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:44:08,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:44:08,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:44:08,713 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:08,713 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:44:08,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272361437] [2022-03-01 17:44:08,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272361437] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:44:08,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022741767] [2022-03-01 17:44:08,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:44:08,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:08,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:44:08,714 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) [2022-03-01 17:44:08,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-01 17:44:08,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:44:08,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:44:08,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:44:08,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:44:08,795 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:08,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:44:08,905 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:08,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022741767] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:44:08,905 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:44:08,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2022-03-01 17:44:08,905 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480168518] [2022-03-01 17:44:08,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:44:08,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:44:08,906 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:44:08,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:44:08,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:44:08,906 INFO L87 Difference]: Start difference. First operand 10350 states and 21747 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:09,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:44:09,091 INFO L93 Difference]: Finished difference Result 10759 states and 22444 transitions. [2022-03-01 17:44:09,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:44:09,091 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:44:09,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:44:09,104 INFO L225 Difference]: With dead ends: 10759 [2022-03-01 17:44:09,105 INFO L226 Difference]: Without dead ends: 10757 [2022-03-01 17:44:09,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:44:09,105 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 227 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:44:09,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 198 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:44:09,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10757 states. [2022-03-01 17:44:09,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10757 to 10354. [2022-03-01 17:44:09,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10354 states, 10353 states have (on average 2.0980392156862746) internal successors, (21721), 10353 states have internal predecessors, (21721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:09,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10354 states to 10354 states and 21721 transitions. [2022-03-01 17:44:09,236 INFO L78 Accepts]: Start accepts. Automaton has 10354 states and 21721 transitions. Word has length 36 [2022-03-01 17:44:09,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:44:09,236 INFO L470 AbstractCegarLoop]: Abstraction has 10354 states and 21721 transitions. [2022-03-01 17:44:09,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:09,236 INFO L276 IsEmpty]: Start isEmpty. Operand 10354 states and 21721 transitions. [2022-03-01 17:44:09,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:44:09,241 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:44:09,241 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:44:09,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-01 17:44:09,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-01 17:44:09,442 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:44:09,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:44:09,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1086431742, now seen corresponding path program 17 times [2022-03-01 17:44:09,442 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:44:09,442 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946125585] [2022-03-01 17:44:09,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:44:09,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:44:09,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:44:09,471 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:44:09,472 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:44:09,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946125585] [2022-03-01 17:44:09,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946125585] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:44:09,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076332417] [2022-03-01 17:44:09,472 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:44:09,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:09,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:44:09,473 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) [2022-03-01 17:44:09,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-01 17:44:09,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:44:09,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:44:09,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:44:09,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:44:09,556 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:44:09,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:44:09,641 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:09,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076332417] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:44:09,641 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:44:09,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2022-03-01 17:44:09,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666887868] [2022-03-01 17:44:09,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:44:09,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:44:09,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:44:09,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:44:09,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:44:09,642 INFO L87 Difference]: Start difference. First operand 10354 states and 21721 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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) [2022-03-01 17:44:09,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:44:09,754 INFO L93 Difference]: Finished difference Result 11847 states and 24779 transitions. [2022-03-01 17:44:09,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:44:09,754 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:44:09,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:44:09,767 INFO L225 Difference]: With dead ends: 11847 [2022-03-01 17:44:09,771 INFO L226 Difference]: Without dead ends: 11787 [2022-03-01 17:44:09,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:44:09,772 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 182 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:44:09,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 187 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:44:09,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11787 states. [2022-03-01 17:44:09,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11787 to 11572. [2022-03-01 17:44:09,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11572 states, 11571 states have (on average 2.0975715149943825) internal successors, (24271), 11571 states have internal predecessors, (24271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:09,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11572 states to 11572 states and 24271 transitions. [2022-03-01 17:44:09,922 INFO L78 Accepts]: Start accepts. Automaton has 11572 states and 24271 transitions. Word has length 36 [2022-03-01 17:44:09,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:44:09,922 INFO L470 AbstractCegarLoop]: Abstraction has 11572 states and 24271 transitions. [2022-03-01 17:44:09,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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) [2022-03-01 17:44:09,922 INFO L276 IsEmpty]: Start isEmpty. Operand 11572 states and 24271 transitions. [2022-03-01 17:44:09,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:44:09,927 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:44:09,928 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:44:09,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-01 17:44:10,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:10,128 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:44:10,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:44:10,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1497212014, now seen corresponding path program 18 times [2022-03-01 17:44:10,129 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:44:10,129 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610651136] [2022-03-01 17:44:10,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:44:10,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:44:10,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:44:10,149 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:44:10,150 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:44:10,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610651136] [2022-03-01 17:44:10,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610651136] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:44:10,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370790875] [2022-03-01 17:44:10,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:44:10,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:10,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:44:10,151 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) [2022-03-01 17:44:10,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-01 17:44:10,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:44:10,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:44:10,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:44:10,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:44:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:44:10,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:44:10,342 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:44:10,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370790875] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:44:10,342 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:44:10,342 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 9 [2022-03-01 17:44:10,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259932987] [2022-03-01 17:44:10,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:44:10,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:44:10,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:44:10,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:44:10,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:44:10,344 INFO L87 Difference]: Start difference. First operand 11572 states and 24271 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:10,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:44:10,471 INFO L93 Difference]: Finished difference Result 14133 states and 29435 transitions. [2022-03-01 17:44:10,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:44:10,471 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:44:10,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:44:10,488 INFO L225 Difference]: With dead ends: 14133 [2022-03-01 17:44:10,488 INFO L226 Difference]: Without dead ends: 14127 [2022-03-01 17:44:10,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:44:10,489 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 143 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:44:10,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 260 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:44:10,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14127 states. [2022-03-01 17:44:10,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14127 to 13872. [2022-03-01 17:44:10,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13872 states, 13871 states have (on average 2.0935044337106192) internal successors, (29039), 13871 states have internal predecessors, (29039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:10,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13872 states to 13872 states and 29039 transitions. [2022-03-01 17:44:10,709 INFO L78 Accepts]: Start accepts. Automaton has 13872 states and 29039 transitions. Word has length 36 [2022-03-01 17:44:10,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:44:10,709 INFO L470 AbstractCegarLoop]: Abstraction has 13872 states and 29039 transitions. [2022-03-01 17:44:10,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:10,709 INFO L276 IsEmpty]: Start isEmpty. Operand 13872 states and 29039 transitions. [2022-03-01 17:44:10,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:44:10,716 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:44:10,716 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:44:10,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-01 17:44:10,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:10,932 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:44:10,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:44:10,932 INFO L85 PathProgramCache]: Analyzing trace with hash -222824474, now seen corresponding path program 19 times [2022-03-01 17:44:10,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:44:10,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610058813] [2022-03-01 17:44:10,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:44:10,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:44:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:44:11,012 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:44:11,012 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:44:11,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610058813] [2022-03-01 17:44:11,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610058813] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:44:11,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226769339] [2022-03-01 17:44:11,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:44:11,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:11,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:44:11,014 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) [2022-03-01 17:44:11,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-01 17:44:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:44:11,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:44:11,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:44:11,115 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:44:11,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:44:11,203 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:44:11,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226769339] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:44:11,203 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:44:11,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 9 [2022-03-01 17:44:11,203 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574655416] [2022-03-01 17:44:11,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:44:11,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:44:11,204 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:44:11,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:44:11,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:44:11,204 INFO L87 Difference]: Start difference. First operand 13872 states and 29039 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:11,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:44:11,366 INFO L93 Difference]: Finished difference Result 14496 states and 30134 transitions. [2022-03-01 17:44:11,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:44:11,367 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:44:11,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:44:11,386 INFO L225 Difference]: With dead ends: 14496 [2022-03-01 17:44:11,387 INFO L226 Difference]: Without dead ends: 14496 [2022-03-01 17:44:11,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:44:11,388 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 178 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:44:11,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 191 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:44:11,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14496 states. [2022-03-01 17:44:11,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14496 to 13888. [2022-03-01 17:44:11,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13888 states, 13887 states have (on average 2.093396701951465) internal successors, (29071), 13887 states have internal predecessors, (29071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:11,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13888 states to 13888 states and 29071 transitions. [2022-03-01 17:44:11,632 INFO L78 Accepts]: Start accepts. Automaton has 13888 states and 29071 transitions. Word has length 36 [2022-03-01 17:44:11,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:44:11,632 INFO L470 AbstractCegarLoop]: Abstraction has 13888 states and 29071 transitions. [2022-03-01 17:44:11,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:11,633 INFO L276 IsEmpty]: Start isEmpty. Operand 13888 states and 29071 transitions. [2022-03-01 17:44:11,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:44:11,638 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:44:11,638 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:44:11,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-01 17:44:11,842 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,SelfDestructingSolverStorable30 [2022-03-01 17:44:11,843 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:44:11,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:44:11,843 INFO L85 PathProgramCache]: Analyzing trace with hash -802282468, now seen corresponding path program 20 times [2022-03-01 17:44:11,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:44:11,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863438097] [2022-03-01 17:44:11,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:44:11,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:44:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:44:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:44:11,912 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:44:11,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863438097] [2022-03-01 17:44:11,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863438097] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:44:11,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698115291] [2022-03-01 17:44:11,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:44:11,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:11,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:44:11,913 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) [2022-03-01 17:44:11,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-01 17:44:11,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:44:11,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:44:11,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:44:11,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:44:11,988 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:44:11,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:44:12,074 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:12,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698115291] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:44:12,074 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:44:12,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2022-03-01 17:44:12,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599380568] [2022-03-01 17:44:12,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:44:12,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:44:12,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:44:12,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:44:12,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:44:12,075 INFO L87 Difference]: Start difference. First operand 13888 states and 29071 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:12,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:44:12,268 INFO L93 Difference]: Finished difference Result 14890 states and 30930 transitions. [2022-03-01 17:44:12,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:44:12,268 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:44:12,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:44:12,286 INFO L225 Difference]: With dead ends: 14890 [2022-03-01 17:44:12,286 INFO L226 Difference]: Without dead ends: 14890 [2022-03-01 17:44:12,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:44:12,286 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 205 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:44:12,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 255 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:44:12,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14890 states. [2022-03-01 17:44:12,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14890 to 13968. [2022-03-01 17:44:12,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13968 states, 13967 states have (on average 2.0928617455430656) internal successors, (29231), 13967 states have internal predecessors, (29231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:12,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13968 states to 13968 states and 29231 transitions. [2022-03-01 17:44:12,468 INFO L78 Accepts]: Start accepts. Automaton has 13968 states and 29231 transitions. Word has length 36 [2022-03-01 17:44:12,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:44:12,468 INFO L470 AbstractCegarLoop]: Abstraction has 13968 states and 29231 transitions. [2022-03-01 17:44:12,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:12,468 INFO L276 IsEmpty]: Start isEmpty. Operand 13968 states and 29231 transitions. [2022-03-01 17:44:12,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:44:12,474 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:44:12,474 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:44:12,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-01 17:44:12,674 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,SelfDestructingSolverStorable31 [2022-03-01 17:44:12,674 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:44:12,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:44:12,675 INFO L85 PathProgramCache]: Analyzing trace with hash 650582462, now seen corresponding path program 21 times [2022-03-01 17:44:12,675 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:44:12,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210039436] [2022-03-01 17:44:12,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:44:12,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:44:12,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:44:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:12,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:44:12,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210039436] [2022-03-01 17:44:12,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210039436] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:44:12,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237555160] [2022-03-01 17:44:12,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:44:12,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:12,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:44:12,703 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) [2022-03-01 17:44:12,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-01 17:44:12,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 17:44:12,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:44:12,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:44:12,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:44:12,772 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:12,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:44:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:12,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237555160] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:44:12,866 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:44:12,866 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:44:12,866 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730820738] [2022-03-01 17:44:12,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:44:12,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:44:12,867 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:44:12,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:44:12,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:44:12,867 INFO L87 Difference]: Start difference. First operand 13968 states and 29231 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 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) [2022-03-01 17:44:13,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:44:13,001 INFO L93 Difference]: Finished difference Result 16178 states and 33735 transitions. [2022-03-01 17:44:13,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:44:13,001 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 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 36 [2022-03-01 17:44:13,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:44:13,022 INFO L225 Difference]: With dead ends: 16178 [2022-03-01 17:44:13,022 INFO L226 Difference]: Without dead ends: 16178 [2022-03-01 17:44:13,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:44:13,023 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 112 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:44:13,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 226 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:44:13,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16178 states. [2022-03-01 17:44:13,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16178 to 15632. [2022-03-01 17:44:13,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15632 states, 15631 states have (on average 2.093084255645832) internal successors, (32717), 15631 states have internal predecessors, (32717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:13,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15632 states to 15632 states and 32717 transitions. [2022-03-01 17:44:13,277 INFO L78 Accepts]: Start accepts. Automaton has 15632 states and 32717 transitions. Word has length 36 [2022-03-01 17:44:13,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:44:13,277 INFO L470 AbstractCegarLoop]: Abstraction has 15632 states and 32717 transitions. [2022-03-01 17:44:13,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 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) [2022-03-01 17:44:13,278 INFO L276 IsEmpty]: Start isEmpty. Operand 15632 states and 32717 transitions. [2022-03-01 17:44:13,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-01 17:44:13,292 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:44:13,292 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:44:13,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-01 17:44:13,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:13,493 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:44:13,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:44:13,493 INFO L85 PathProgramCache]: Analyzing trace with hash -260426766, now seen corresponding path program 22 times [2022-03-01 17:44:13,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:44:13,494 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528724798] [2022-03-01 17:44:13,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:44:13,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:44:13,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:44:13,562 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:13,562 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:44:13,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528724798] [2022-03-01 17:44:13,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528724798] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:44:13,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372961855] [2022-03-01 17:44:13,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:44:13,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:13,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:44:13,564 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) [2022-03-01 17:44:13,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-01 17:44:13,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:44:13,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:44:13,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:44:13,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:44:13,669 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:13,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:44:13,789 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:13,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372961855] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:44:13,789 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:44:13,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-01 17:44:13,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000042891] [2022-03-01 17:44:13,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:44:13,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:44:13,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:44:13,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:44:13,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:44:13,790 INFO L87 Difference]: Start difference. First operand 15632 states and 32717 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:14,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:44:14,019 INFO L93 Difference]: Finished difference Result 19172 states and 39874 transitions. [2022-03-01 17:44:14,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:44:14,019 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-03-01 17:44:14,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:44:14,045 INFO L225 Difference]: With dead ends: 19172 [2022-03-01 17:44:14,045 INFO L226 Difference]: Without dead ends: 19172 [2022-03-01 17:44:14,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=271, Invalid=485, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:44:14,046 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 253 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:44:14,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 372 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:44:14,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19172 states. [2022-03-01 17:44:14,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19172 to 16468. [2022-03-01 17:44:14,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16468 states, 16467 states have (on average 2.092002186190563) internal successors, (34449), 16467 states have internal predecessors, (34449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:14,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16468 states to 16468 states and 34449 transitions. [2022-03-01 17:44:14,299 INFO L78 Accepts]: Start accepts. Automaton has 16468 states and 34449 transitions. Word has length 46 [2022-03-01 17:44:14,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:44:14,299 INFO L470 AbstractCegarLoop]: Abstraction has 16468 states and 34449 transitions. [2022-03-01 17:44:14,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:14,299 INFO L276 IsEmpty]: Start isEmpty. Operand 16468 states and 34449 transitions. [2022-03-01 17:44:14,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-01 17:44:14,312 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:44:14,312 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:44:14,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-01 17:44:14,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:14,516 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:44:14,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:44:14,517 INFO L85 PathProgramCache]: Analyzing trace with hash -461703642, now seen corresponding path program 23 times [2022-03-01 17:44:14,517 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:44:14,517 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256056133] [2022-03-01 17:44:14,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:44:14,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:44:14,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:44:14,550 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 17:44:14,550 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:44:14,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256056133] [2022-03-01 17:44:14,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256056133] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:44:14,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438322024] [2022-03-01 17:44:14,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:44:14,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:14,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:44:14,552 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) [2022-03-01 17:44:14,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-01 17:44:14,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:44:14,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:44:14,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:44:14,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:44:14,658 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 17:44:14,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:44:14,816 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:14,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438322024] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:44:14,816 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:44:14,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 12 [2022-03-01 17:44:14,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527443149] [2022-03-01 17:44:14,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:44:14,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:44:14,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:44:14,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:44:14,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:44:14,818 INFO L87 Difference]: Start difference. First operand 16468 states and 34449 transitions. Second operand has 13 states, 13 states have (on average 6.0) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:15,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:44:15,111 INFO L93 Difference]: Finished difference Result 24035 states and 50007 transitions. [2022-03-01 17:44:15,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:44:15,111 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-03-01 17:44:15,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:44:15,144 INFO L225 Difference]: With dead ends: 24035 [2022-03-01 17:44:15,144 INFO L226 Difference]: Without dead ends: 24035 [2022-03-01 17:44:15,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=314, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:44:15,144 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 272 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:44:15,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 337 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:44:15,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24035 states. [2022-03-01 17:44:15,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24035 to 22092. [2022-03-01 17:44:15,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22092 states, 22091 states have (on average 2.102077769227287) internal successors, (46437), 22091 states have internal predecessors, (46437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:15,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22092 states to 22092 states and 46437 transitions. [2022-03-01 17:44:15,517 INFO L78 Accepts]: Start accepts. Automaton has 22092 states and 46437 transitions. Word has length 46 [2022-03-01 17:44:15,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:44:15,517 INFO L470 AbstractCegarLoop]: Abstraction has 22092 states and 46437 transitions. [2022-03-01 17:44:15,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:15,518 INFO L276 IsEmpty]: Start isEmpty. Operand 22092 states and 46437 transitions. [2022-03-01 17:44:15,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-01 17:44:15,539 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:44:15,539 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:44:15,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-01 17:44:15,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:15,755 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:44:15,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:44:15,756 INFO L85 PathProgramCache]: Analyzing trace with hash 708352358, now seen corresponding path program 24 times [2022-03-01 17:44:15,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:44:15,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044599577] [2022-03-01 17:44:15,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:44:15,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:44:15,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:44:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 17:44:15,781 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:44:15,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044599577] [2022-03-01 17:44:15,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044599577] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:44:15,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457616551] [2022-03-01 17:44:15,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:44:15,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:15,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:44:15,782 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) [2022-03-01 17:44:15,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-01 17:44:15,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:44:15,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:44:15,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:44:15,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:44:15,869 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 17:44:15,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:44:16,026 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:16,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457616551] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:44:16,027 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:44:16,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 12 [2022-03-01 17:44:16,027 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628849310] [2022-03-01 17:44:16,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:44:16,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:44:16,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:44:16,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:44:16,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:44:16,028 INFO L87 Difference]: Start difference. First operand 22092 states and 46437 transitions. Second operand has 13 states, 13 states have (on average 6.0) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:16,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:44:16,253 INFO L93 Difference]: Finished difference Result 23037 states and 47959 transitions. [2022-03-01 17:44:16,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:44:16,253 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-03-01 17:44:16,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:44:16,284 INFO L225 Difference]: With dead ends: 23037 [2022-03-01 17:44:16,285 INFO L226 Difference]: Without dead ends: 22969 [2022-03-01 17:44:16,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=147, Invalid=233, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:44:16,285 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 212 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:44:16,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 456 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:44:16,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22969 states. [2022-03-01 17:44:16,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22969 to 19748. [2022-03-01 17:44:16,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19748 states, 19747 states have (on average 2.098394692864739) internal successors, (41437), 19747 states have internal predecessors, (41437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:16,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19748 states to 19748 states and 41437 transitions. [2022-03-01 17:44:16,627 INFO L78 Accepts]: Start accepts. Automaton has 19748 states and 41437 transitions. Word has length 46 [2022-03-01 17:44:16,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:44:16,627 INFO L470 AbstractCegarLoop]: Abstraction has 19748 states and 41437 transitions. [2022-03-01 17:44:16,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:16,627 INFO L276 IsEmpty]: Start isEmpty. Operand 19748 states and 41437 transitions. [2022-03-01 17:44:16,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-01 17:44:16,643 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:44:16,643 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:44:16,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-01 17:44:16,843 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,SelfDestructingSolverStorable35 [2022-03-01 17:44:16,844 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:44:16,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:44:16,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1828387508, now seen corresponding path program 25 times [2022-03-01 17:44:16,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:44:16,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021650291] [2022-03-01 17:44:16,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:44:16,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:44:16,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:44:16,877 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:44:16,877 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:44:16,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021650291] [2022-03-01 17:44:16,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021650291] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:44:16,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384414746] [2022-03-01 17:44:16,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:44:16,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:16,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:44:16,878 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) [2022-03-01 17:44:16,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-01 17:44:16,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:44:16,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:44:16,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:44:16,961 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:44:16,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:44:17,097 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:17,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384414746] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:44:17,098 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:44:17,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 12 [2022-03-01 17:44:17,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796287424] [2022-03-01 17:44:17,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:44:17,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:44:17,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:44:17,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:44:17,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:44:17,099 INFO L87 Difference]: Start difference. First operand 19748 states and 41437 transitions. Second operand has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:17,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:44:17,336 INFO L93 Difference]: Finished difference Result 23032 states and 48100 transitions. [2022-03-01 17:44:17,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:44:17,336 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-03-01 17:44:17,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:44:17,368 INFO L225 Difference]: With dead ends: 23032 [2022-03-01 17:44:17,368 INFO L226 Difference]: Without dead ends: 22964 [2022-03-01 17:44:17,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:44:17,369 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 266 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:44:17,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 379 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:44:17,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22964 states. [2022-03-01 17:44:17,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22964 to 22232. [2022-03-01 17:44:17,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22232 states, 22231 states have (on average 2.098825963744321) internal successors, (46659), 22231 states have internal predecessors, (46659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:17,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22232 states to 22232 states and 46659 transitions. [2022-03-01 17:44:17,711 INFO L78 Accepts]: Start accepts. Automaton has 22232 states and 46659 transitions. Word has length 46 [2022-03-01 17:44:17,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:44:17,711 INFO L470 AbstractCegarLoop]: Abstraction has 22232 states and 46659 transitions. [2022-03-01 17:44:17,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:17,711 INFO L276 IsEmpty]: Start isEmpty. Operand 22232 states and 46659 transitions. [2022-03-01 17:44:17,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-01 17:44:17,726 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:44:17,726 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:44:17,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-01 17:44:17,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-01 17:44:17,926 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:44:17,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:44:17,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1267130958, now seen corresponding path program 26 times [2022-03-01 17:44:17,927 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:44:17,927 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544547368] [2022-03-01 17:44:17,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:44:17,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:44:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:44:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:44:17,955 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:44:17,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544547368] [2022-03-01 17:44:17,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544547368] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:44:17,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284341895] [2022-03-01 17:44:17,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:44:17,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:17,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:44:17,957 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) [2022-03-01 17:44:17,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-01 17:44:17,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:44:17,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:44:17,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:44:17,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:44:18,043 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:44:18,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:44:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:44:18,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284341895] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:44:18,221 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:44:18,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2022-03-01 17:44:18,221 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315496512] [2022-03-01 17:44:18,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:44:18,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:44:18,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:44:18,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:44:18,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:44:18,224 INFO L87 Difference]: Start difference. First operand 22232 states and 46659 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:18,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:44:18,415 INFO L93 Difference]: Finished difference Result 26761 states and 55923 transitions. [2022-03-01 17:44:18,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:44:18,415 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-03-01 17:44:18,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:44:18,452 INFO L225 Difference]: With dead ends: 26761 [2022-03-01 17:44:18,453 INFO L226 Difference]: Without dead ends: 26758 [2022-03-01 17:44:18,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:44:18,453 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 206 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:44:18,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 239 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:44:18,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26758 states. [2022-03-01 17:44:18,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26758 to 24312. [2022-03-01 17:44:18,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24312 states, 24311 states have (on average 2.0999958866356794) internal successors, (51053), 24311 states have internal predecessors, (51053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:18,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24312 states to 24312 states and 51053 transitions. [2022-03-01 17:44:18,761 INFO L78 Accepts]: Start accepts. Automaton has 24312 states and 51053 transitions. Word has length 46 [2022-03-01 17:44:18,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:44:18,761 INFO L470 AbstractCegarLoop]: Abstraction has 24312 states and 51053 transitions. [2022-03-01 17:44:18,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:18,761 INFO L276 IsEmpty]: Start isEmpty. Operand 24312 states and 51053 transitions. [2022-03-01 17:44:18,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-01 17:44:18,777 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:44:18,778 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:44:18,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-01 17:44:18,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-01 17:44:18,978 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:44:18,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:44:18,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1707831838, now seen corresponding path program 27 times [2022-03-01 17:44:18,978 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:44:18,978 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313461428] [2022-03-01 17:44:18,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:44:18,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:44:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:44:19,021 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:44:19,021 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:44:19,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313461428] [2022-03-01 17:44:19,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313461428] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:44:19,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324620232] [2022-03-01 17:44:19,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:44:19,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:19,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:44:19,023 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) [2022-03-01 17:44:19,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-01 17:44:19,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 17:44:19,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:44:19,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:44:19,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:44:19,107 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:44:19,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:44:19,219 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:19,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324620232] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:44:19,219 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:44:19,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 13 [2022-03-01 17:44:19,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124526445] [2022-03-01 17:44:19,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:44:19,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:44:19,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:44:19,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:44:19,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:44:19,221 INFO L87 Difference]: Start difference. First operand 24312 states and 51053 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:19,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:44:19,474 INFO L93 Difference]: Finished difference Result 27266 states and 57039 transitions. [2022-03-01 17:44:19,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:44:19,474 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-03-01 17:44:19,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:44:19,523 INFO L225 Difference]: With dead ends: 27266 [2022-03-01 17:44:19,523 INFO L226 Difference]: Without dead ends: 27266 [2022-03-01 17:44:19,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=265, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:44:19,527 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 174 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:44:19,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 337 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:44:19,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27266 states. [2022-03-01 17:44:19,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27266 to 24676. [2022-03-01 17:44:19,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24676 states, 24675 states have (on average 2.0991691995947317) internal successors, (51797), 24675 states have internal predecessors, (51797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:19,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24676 states to 24676 states and 51797 transitions. [2022-03-01 17:44:19,945 INFO L78 Accepts]: Start accepts. Automaton has 24676 states and 51797 transitions. Word has length 46 [2022-03-01 17:44:19,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:44:19,946 INFO L470 AbstractCegarLoop]: Abstraction has 24676 states and 51797 transitions. [2022-03-01 17:44:19,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:19,946 INFO L276 IsEmpty]: Start isEmpty. Operand 24676 states and 51797 transitions. [2022-03-01 17:44:19,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-01 17:44:19,963 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:44:19,963 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:44:19,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-01 17:44:20,164 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,SelfDestructingSolverStorable38 [2022-03-01 17:44:20,164 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:44:20,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:44:20,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1000006366, now seen corresponding path program 28 times [2022-03-01 17:44:20,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:44:20,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068476339] [2022-03-01 17:44:20,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:44:20,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:44:20,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:44:20,214 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-01 17:44:20,214 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:44:20,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068476339] [2022-03-01 17:44:20,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068476339] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:44:20,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512102344] [2022-03-01 17:44:20,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:44:20,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:20,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:44:20,216 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) [2022-03-01 17:44:20,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-01 17:44:20,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:44:20,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:44:20,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:44:20,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:44:20,312 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-01 17:44:20,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:44:20,431 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:20,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512102344] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:44:20,431 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:44:20,431 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 12 [2022-03-01 17:44:20,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178413121] [2022-03-01 17:44:20,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:44:20,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:44:20,432 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:44:20,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:44:20,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:44:20,432 INFO L87 Difference]: Start difference. First operand 24676 states and 51797 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 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) [2022-03-01 17:44:20,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:44:20,662 INFO L93 Difference]: Finished difference Result 32078 states and 67337 transitions. [2022-03-01 17:44:20,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:44:20,662 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-03-01 17:44:20,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:44:20,718 INFO L225 Difference]: With dead ends: 32078 [2022-03-01 17:44:20,718 INFO L226 Difference]: Without dead ends: 32002 [2022-03-01 17:44:20,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:44:20,718 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 158 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:44:20,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 247 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:44:20,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32002 states. [2022-03-01 17:44:21,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32002 to 27628. [2022-03-01 17:44:21,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27628 states, 27627 states have (on average 2.1005176095848266) internal successors, (58031), 27627 states have internal predecessors, (58031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:21,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27628 states to 27628 states and 58031 transitions. [2022-03-01 17:44:21,234 INFO L78 Accepts]: Start accepts. Automaton has 27628 states and 58031 transitions. Word has length 46 [2022-03-01 17:44:21,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:44:21,234 INFO L470 AbstractCegarLoop]: Abstraction has 27628 states and 58031 transitions. [2022-03-01 17:44:21,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 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) [2022-03-01 17:44:21,234 INFO L276 IsEmpty]: Start isEmpty. Operand 27628 states and 58031 transitions. [2022-03-01 17:44:21,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-01 17:44:21,252 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:44:21,252 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:44:21,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-01 17:44:21,452 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,SelfDestructingSolverStorable39 [2022-03-01 17:44:21,452 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:44:21,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:44:21,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1577635516, now seen corresponding path program 29 times [2022-03-01 17:44:21,453 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:44:21,453 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121142578] [2022-03-01 17:44:21,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:44:21,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:44:21,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:44:21,478 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-01 17:44:21,478 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:44:21,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121142578] [2022-03-01 17:44:21,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121142578] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:44:21,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479673072] [2022-03-01 17:44:21,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:44:21,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:21,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:44:21,479 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) [2022-03-01 17:44:21,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-01 17:44:21,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-01 17:44:21,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:44:21,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:44:21,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:44:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-01 17:44:21,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:44:21,734 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:44:21,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479673072] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:44:21,735 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:44:21,735 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8] total 11 [2022-03-01 17:44:21,735 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597886901] [2022-03-01 17:44:21,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:44:21,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:44:21,735 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:44:21,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:44:21,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:44:21,736 INFO L87 Difference]: Start difference. First operand 27628 states and 58031 transitions. Second operand has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 11 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:21,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:44:21,894 INFO L93 Difference]: Finished difference Result 32069 states and 67248 transitions. [2022-03-01 17:44:21,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:44:21,895 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 11 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-03-01 17:44:21,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:44:21,943 INFO L225 Difference]: With dead ends: 32069 [2022-03-01 17:44:21,943 INFO L226 Difference]: Without dead ends: 32069 [2022-03-01 17:44:21,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:44:21,944 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 166 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:44:21,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 210 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:44:21,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32069 states. [2022-03-01 17:44:22,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32069 to 27632. [2022-03-01 17:44:22,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27632 states, 27631 states have (on average 2.0994897035937896) internal successors, (58011), 27631 states have internal predecessors, (58011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:22,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27632 states to 27632 states and 58011 transitions. [2022-03-01 17:44:22,527 INFO L78 Accepts]: Start accepts. Automaton has 27632 states and 58011 transitions. Word has length 46 [2022-03-01 17:44:22,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:44:22,527 INFO L470 AbstractCegarLoop]: Abstraction has 27632 states and 58011 transitions. [2022-03-01 17:44:22,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 11 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:22,527 INFO L276 IsEmpty]: Start isEmpty. Operand 27632 states and 58011 transitions. [2022-03-01 17:44:22,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-01 17:44:22,544 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:44:22,544 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:44:22,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-01 17:44:22,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:22,745 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:44:22,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:44:22,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1852613086, now seen corresponding path program 30 times [2022-03-01 17:44:22,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:44:22,746 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596746659] [2022-03-01 17:44:22,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:44:22,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:44:22,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:44:22,776 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:44:22,776 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:44:22,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596746659] [2022-03-01 17:44:22,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596746659] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:44:22,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115619836] [2022-03-01 17:44:22,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:44:22,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:22,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:44:22,777 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:44:22,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-01 17:44:22,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-01 17:44:22,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:44:22,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:44:22,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:44:22,942 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-01 17:44:22,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:44:23,048 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-01 17:44:23,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115619836] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:44:23,048 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:44:23,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 14 [2022-03-01 17:44:23,049 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287278450] [2022-03-01 17:44:23,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:44:23,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:44:23,049 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:44:23,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:44:23,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:44:23,049 INFO L87 Difference]: Start difference. First operand 27632 states and 58011 transitions. Second operand has 15 states, 15 states have (on average 6.933333333333334) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:23,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:44:23,615 INFO L93 Difference]: Finished difference Result 43719 states and 89619 transitions. [2022-03-01 17:44:23,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:44:23,616 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.933333333333334) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-03-01 17:44:23,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:44:23,616 INFO L225 Difference]: With dead ends: 43719 [2022-03-01 17:44:23,616 INFO L226 Difference]: Without dead ends: 0 [2022-03-01 17:44:23,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=372, Invalid=1434, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 17:44:23,617 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 340 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:44:23,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 683 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:44:23,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-01 17:44:23,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-01 17:44:23,617 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) [2022-03-01 17:44:23,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-01 17:44:23,617 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2022-03-01 17:44:23,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:44:23,617 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-01 17:44:23,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.933333333333334) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:44:23,617 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-01 17:44:23,618 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-01 17:44:23,619 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-01 17:44:23,620 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-01 17:44:23,620 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-01 17:44:23,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-01 17:44:23,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:44:23,834 INFO L732 BasicCegarLoop]: Path program histogram: [30, 5, 2, 2, 2, 1] [2022-03-01 17:44:23,836 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-01 17:44:23,836 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-01 17:44:23,837 INFO L202 PluginConnector]: Adding new model misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.03 05:44:23 BasicIcfg [2022-03-01 17:44:23,837 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-01 17:44:23,837 INFO L158 Benchmark]: Toolchain (without parser) took 29999.02ms. Allocated memory was 200.3MB in the beginning and 3.0GB in the end (delta: 2.8GB). Free memory was 168.2MB in the beginning and 2.3GB in the end (delta: -2.1GB). Peak memory consumption was 658.4MB. Max. memory is 8.0GB. [2022-03-01 17:44:23,837 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 200.3MB. Free memory was 169.4MB in the beginning and 169.2MB in the end (delta: 147.1kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-01 17:44:23,838 INFO L158 Benchmark]: Boogie Procedure Inliner took 17.78ms. Allocated memory is still 200.3MB. Free memory was 168.1MB in the beginning and 166.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-01 17:44:23,838 INFO L158 Benchmark]: Boogie Preprocessor took 12.89ms. Allocated memory is still 200.3MB. Free memory was 166.7MB in the beginning and 165.7MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-01 17:44:23,838 INFO L158 Benchmark]: RCFGBuilder took 223.34ms. Allocated memory is still 200.3MB. Free memory was 165.7MB in the beginning and 156.8MB in the end (delta: 8.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-01 17:44:23,838 INFO L158 Benchmark]: TraceAbstraction took 29740.96ms. Allocated memory was 200.3MB in the beginning and 3.0GB in the end (delta: 2.8GB). Free memory was 156.2MB in the beginning and 2.3GB in the end (delta: -2.2GB). Peak memory consumption was 645.8MB. Max. memory is 8.0GB. [2022-03-01 17:44:23,839 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 0.10ms. Allocated memory is still 200.3MB. Free memory was 169.4MB in the beginning and 169.2MB in the end (delta: 147.1kB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 17.78ms. Allocated memory is still 200.3MB. Free memory was 168.1MB in the beginning and 166.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 12.89ms. Allocated memory is still 200.3MB. Free memory was 166.7MB in the beginning and 165.7MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 223.34ms. Allocated memory is still 200.3MB. Free memory was 165.7MB in the beginning and 156.8MB in the end (delta: 8.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 29740.96ms. Allocated memory was 200.3MB in the beginning and 3.0GB in the end (delta: 2.8GB). Free memory was 156.2MB in the beginning and 2.3GB in the end (delta: -2.2GB). Peak memory consumption was 645.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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: 59]: 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, 44 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 29.6s, OverallIterations: 42, TraceHistogramMax: 4, PathProgramHistogramMax: 30, EmptinessCheckTime: 0.3s, AutomataDifference: 6.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6614 SdHoareTripleChecker+Valid, 2.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6614 mSDsluCounter, 9210 SdHoareTripleChecker+Invalid, 2.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8545 mSDsCounter, 744 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5408 IncrementalHoareTripleChecker+Invalid, 6152 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 744 mSolverCounterUnsat, 1889 mSDtfsCounter, 5408 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2979 GetRequests, 2374 SyntacticMatches, 78 SemanticMatches, 527 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2825 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27632occurred in iteration=41, InterpolantAutomatonStates: 497, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 6.1s AutomataMinimizationTime, 42 MinimizatonAttempts, 49279 StatesRemovedByMinimization, 41 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 7.5s InterpolantComputationTime, 2668 NumberOfCodeBlocks, 2658 NumberOfCodeBlocksAsserted, 135 NumberOfCheckSat, 3830 ConstructedInterpolants, 0 QuantifiedInterpolants, 23808 SizeOfPredicates, 97 NumberOfNonLiveVariables, 2154 ConjunctsInSsa, 318 ConjunctsInUnsatCore, 114 InterpolantComputations, 6 PerfectInterpolantSequences, 1013/2535 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! [2022-03-01 17:44:23,868 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...