/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/bAnd1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-30 22:57:36,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-30 22:57:36,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-30 22:57:36,475 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-30 22:57:36,505 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-01-30 22:57:36,535 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-30 22:57:36,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-30 22:57:36,536 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-30 22:57:36,536 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-30 22:57:36,537 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-30 22:57:36,537 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-30 22:57:36,537 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-30 22:57:36,538 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-30 22:57:36,538 INFO L138 SettingsManager]: * Use SBE=true [2022-01-30 22:57:36,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-30 22:57:36,538 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-30 22:57:36,539 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-30 22:57:36,539 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-30 22:57:36,539 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-30 22:57:36,539 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-30 22:57:36,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-30 22:57:36,539 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-30 22:57:36,539 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-30 22:57:36,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-30 22:57:36,540 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-30 22:57:36,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-30 22:57:36,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-30 22:57:36,540 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-30 22:57:36,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-30 22:57:36,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 22:57:36,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-30 22:57:36,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-30 22:57:36,541 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-30 22:57:36,541 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-30 22:57:36,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-30 22:57:36,541 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-30 22:57:36,541 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-30 22:57:36,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-30 22:57:36,541 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-30 22:57:36,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-30 22:57:36,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-30 22:57:36,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-30 22:57:36,732 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-30 22:57:36,733 INFO L275 PluginConnector]: CDTParser initialized [2022-01-30 22:57:36,733 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bAnd1.i [2022-01-30 22:57:36,792 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c5b8b458/ee115781491a43eeb524c46bfa24047e/FLAG9bb14e666 [2022-01-30 22:57:37,140 INFO L306 CDTParser]: Found 1 translation units. [2022-01-30 22:57:37,140 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bAnd1.i [2022-01-30 22:57:37,155 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c5b8b458/ee115781491a43eeb524c46bfa24047e/FLAG9bb14e666 [2022-01-30 22:57:37,544 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c5b8b458/ee115781491a43eeb524c46bfa24047e [2022-01-30 22:57:37,546 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-30 22:57:37,547 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-30 22:57:37,551 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-30 22:57:37,551 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-30 22:57:37,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-30 22:57:37,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 10:57:37" (1/1) ... [2022-01-30 22:57:37,555 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@344e432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:57:37, skipping insertion in model container [2022-01-30 22:57:37,556 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 10:57:37" (1/1) ... [2022-01-30 22:57:37,561 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-30 22:57:37,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-30 22:57:37,706 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bAnd1.i[1290,1303] [2022-01-30 22:57:37,708 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 22:57:37,713 INFO L203 MainTranslator]: Completed pre-run [2022-01-30 22:57:37,728 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bAnd1.i[1290,1303] [2022-01-30 22:57:37,729 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 22:57:37,738 INFO L208 MainTranslator]: Completed translation [2022-01-30 22:57:37,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:57:37 WrapperNode [2022-01-30 22:57:37,739 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-30 22:57:37,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-30 22:57:37,740 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-30 22:57:37,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-30 22:57:37,748 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:57:37" (1/1) ... [2022-01-30 22:57:37,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:57:37" (1/1) ... [2022-01-30 22:57:37,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:57:37" (1/1) ... [2022-01-30 22:57:37,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:57:37" (1/1) ... [2022-01-30 22:57:37,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:57:37" (1/1) ... [2022-01-30 22:57:37,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:57:37" (1/1) ... [2022-01-30 22:57:37,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:57:37" (1/1) ... [2022-01-30 22:57:37,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-30 22:57:37,766 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-30 22:57:37,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-30 22:57:37,767 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-30 22:57:37,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:57:37" (1/1) ... [2022-01-30 22:57:37,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 22:57:37,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:57:37,793 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) [2022-01-30 22:57:37,799 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 [2022-01-30 22:57:37,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-30 22:57:37,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-30 22:57:37,827 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-30 22:57:37,827 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2022-01-30 22:57:37,827 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-30 22:57:37,828 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-30 22:57:37,828 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-30 22:57:37,828 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-30 22:57:37,828 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-30 22:57:37,828 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-30 22:57:37,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-30 22:57:37,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-30 22:57:37,830 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2022-01-30 22:57:37,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-30 22:57:37,831 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-30 22:57:37,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-30 22:57:37,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-30 22:57:37,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-30 22:57:37,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-30 22:57:37,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-30 22:57:37,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-30 22:57:37,890 INFO L234 CfgBuilder]: Building ICFG [2022-01-30 22:57:37,891 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-30 22:57:37,999 INFO L275 CfgBuilder]: Performing block encoding [2022-01-30 22:57:38,007 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-30 22:57:38,007 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-30 22:57:38,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 10:57:38 BoogieIcfgContainer [2022-01-30 22:57:38,008 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-30 22:57:38,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-30 22:57:38,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-30 22:57:38,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-30 22:57:38,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 10:57:37" (1/3) ... [2022-01-30 22:57:38,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41af66c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 10:57:38, skipping insertion in model container [2022-01-30 22:57:38,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:57:37" (2/3) ... [2022-01-30 22:57:38,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41af66c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 10:57:38, skipping insertion in model container [2022-01-30 22:57:38,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 10:57:38" (3/3) ... [2022-01-30 22:57:38,014 INFO L111 eAbstractionObserver]: Analyzing ICFG bAnd1.i [2022-01-30 22:57:38,023 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-30 22:57:38,023 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-30 22:57:38,067 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-30 22:57:38,077 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-30 22:57:38,078 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-30 22:57:38,096 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:57:38,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-30 22:57:38,101 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:57:38,101 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:57:38,102 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:57:38,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:57:38,106 INFO L85 PathProgramCache]: Analyzing trace with hash -56143050, now seen corresponding path program 1 times [2022-01-30 22:57:38,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:57:38,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999694432] [2022-01-30 22:57:38,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:57:38,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:57:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:38,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:57:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:38,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-30 22:57:38,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:38,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-30 22:57:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:38,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-30 22:57:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-30 22:57:38,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:57:38,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999694432] [2022-01-30 22:57:38,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999694432] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:57:38,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:57:38,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-30 22:57:38,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169717814] [2022-01-30 22:57:38,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:57:38,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 22:57:38,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:57:38,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 22:57:38,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 22:57:38,429 INFO L87 Difference]: Start difference. First operand has 31 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 22:57:38,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:57:38,464 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2022-01-30 22:57:38,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 22:57:38,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-01-30 22:57:38,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:57:38,471 INFO L225 Difference]: With dead ends: 54 [2022-01-30 22:57:38,471 INFO L226 Difference]: Without dead ends: 26 [2022-01-30 22:57:38,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 22:57:38,477 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:57:38,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 35 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:57:38,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-30 22:57:38,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-30 22:57:38,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:57:38,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-01-30 22:57:38,509 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2022-01-30 22:57:38,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:57:38,510 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-01-30 22:57:38,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 22:57:38,510 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-01-30 22:57:38,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-30 22:57:38,512 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:57:38,512 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:57:38,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-30 22:57:38,512 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:57:38,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:57:38,513 INFO L85 PathProgramCache]: Analyzing trace with hash 809042352, now seen corresponding path program 1 times [2022-01-30 22:57:38,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:57:38,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092804861] [2022-01-30 22:57:38,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:57:38,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:57:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:38,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:57:38,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:38,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-30 22:57:38,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:38,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-30 22:57:38,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:38,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-30 22:57:38,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-30 22:57:38,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:57:38,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092804861] [2022-01-30 22:57:38,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092804861] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:57:38,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212302565] [2022-01-30 22:57:38,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:57:38,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:57:38,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:57:38,619 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) [2022-01-30 22:57:38,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-30 22:57:38,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:38,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-30 22:57:38,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:57:38,817 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-30 22:57:38,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 22:57:38,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212302565] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:57:38,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-30 22:57:38,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-30 22:57:38,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96992543] [2022-01-30 22:57:38,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:57:38,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 22:57:38,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:57:38,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 22:57:38,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 22:57:38,821 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 22:57:38,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:57:38,843 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2022-01-30 22:57:38,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 22:57:38,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-01-30 22:57:38,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:57:38,847 INFO L225 Difference]: With dead ends: 46 [2022-01-30 22:57:38,847 INFO L226 Difference]: Without dead ends: 28 [2022-01-30 22:57:38,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 22:57:38,849 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:57:38,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:57:38,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-30 22:57:38,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-01-30 22:57:38,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:57:38,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-30 22:57:38,856 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2022-01-30 22:57:38,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:57:38,856 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-30 22:57:38,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 22:57:38,857 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-30 22:57:38,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-30 22:57:38,857 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:57:38,858 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:57:38,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-30 22:57:39,067 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 [2022-01-30 22:57:39,068 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:57:39,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:57:39,068 INFO L85 PathProgramCache]: Analyzing trace with hash -873205998, now seen corresponding path program 1 times [2022-01-30 22:57:39,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:57:39,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622497728] [2022-01-30 22:57:39,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:57:39,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:57:39,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:39,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:57:39,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:39,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-30 22:57:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:39,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-30 22:57:39,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:39,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-30 22:57:39,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:39,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-30 22:57:39,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:57:39,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622497728] [2022-01-30 22:57:39,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622497728] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:57:39,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091373913] [2022-01-30 22:57:39,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:57:39,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:57:39,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:57:39,162 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) [2022-01-30 22:57:39,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-30 22:57:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:39,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-30 22:57:39,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:57:39,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-30 22:57:39,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 22:57:39,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091373913] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:57:39,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-30 22:57:39,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-01-30 22:57:39,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470831305] [2022-01-30 22:57:39,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:57:39,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 22:57:39,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:57:39,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 22:57:39,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 22:57:39,311 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 22:57:39,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:57:39,325 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2022-01-30 22:57:39,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 22:57:39,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-01-30 22:57:39,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:57:39,327 INFO L225 Difference]: With dead ends: 46 [2022-01-30 22:57:39,327 INFO L226 Difference]: Without dead ends: 29 [2022-01-30 22:57:39,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 22:57:39,331 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:57:39,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:57:39,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-30 22:57:39,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-01-30 22:57:39,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:57:39,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-30 22:57:39,348 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2022-01-30 22:57:39,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:57:39,348 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-30 22:57:39,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 22:57:39,349 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-30 22:57:39,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-30 22:57:39,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:57:39,350 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:57:39,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-30 22:57:39,550 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,SelfDestructingSolverStorable2 [2022-01-30 22:57:39,551 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:57:39,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:57:39,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1356290064, now seen corresponding path program 1 times [2022-01-30 22:57:39,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:57:39,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314863751] [2022-01-30 22:57:39,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:57:39,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:57:39,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:39,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:57:39,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:39,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-30 22:57:39,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:39,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-30 22:57:39,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:39,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-30 22:57:39,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:39,655 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-30 22:57:39,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:57:39,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314863751] [2022-01-30 22:57:39,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314863751] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:57:39,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268151161] [2022-01-30 22:57:39,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:57:39,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:57:39,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:57:39,657 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) [2022-01-30 22:57:39,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-30 22:57:39,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:39,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-30 22:57:39,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:57:39,772 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-30 22:57:39,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 22:57:39,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268151161] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:57:39,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-30 22:57:39,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-30 22:57:39,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116871420] [2022-01-30 22:57:39,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:57:39,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 22:57:39,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:57:39,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 22:57:39,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 22:57:39,775 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 22:57:39,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:57:39,783 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-01-30 22:57:39,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 22:57:39,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-01-30 22:57:39,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:57:39,784 INFO L225 Difference]: With dead ends: 43 [2022-01-30 22:57:39,784 INFO L226 Difference]: Without dead ends: 30 [2022-01-30 22:57:39,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 22:57:39,786 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:57:39,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:57:39,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-30 22:57:39,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-01-30 22:57:39,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:57:39,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-01-30 22:57:39,790 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2022-01-30 22:57:39,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:57:39,792 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-01-30 22:57:39,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 22:57:39,792 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-01-30 22:57:39,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-30 22:57:39,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:57:39,793 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:57:39,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-30 22:57:40,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:57:40,009 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:57:40,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:57:40,010 INFO L85 PathProgramCache]: Analyzing trace with hash 820504686, now seen corresponding path program 1 times [2022-01-30 22:57:40,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:57:40,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928885162] [2022-01-30 22:57:40,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:57:40,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:57:40,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:40,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:57:40,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:40,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-30 22:57:40,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:40,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-30 22:57:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:40,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-30 22:57:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:40,082 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-30 22:57:40,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:57:40,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928885162] [2022-01-30 22:57:40,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928885162] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:57:40,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070183014] [2022-01-30 22:57:40,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:57:40,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:57:40,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:57:40,084 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) [2022-01-30 22:57:40,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-30 22:57:40,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:40,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 22:57:40,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:57:40,270 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-30 22:57:40,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:57:40,381 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-30 22:57:40,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070183014] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:57:40,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:57:40,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-30 22:57:40,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144189676] [2022-01-30 22:57:40,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:57:40,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 22:57:40,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:57:40,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 22:57:40,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-30 22:57:40,384 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:57:40,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:57:40,475 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2022-01-30 22:57:40,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 22:57:40,476 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), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2022-01-30 22:57:40,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:57:40,478 INFO L225 Difference]: With dead ends: 55 [2022-01-30 22:57:40,478 INFO L226 Difference]: Without dead ends: 35 [2022-01-30 22:57:40,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-30 22:57:40,480 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:57:40,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 42 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:57:40,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-30 22:57:40,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-30 22:57:40,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:57:40,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-01-30 22:57:40,499 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 42 [2022-01-30 22:57:40,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:57:40,499 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-01-30 22:57:40,500 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), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:57:40,500 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-01-30 22:57:40,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-30 22:57:40,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:57:40,501 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:57:40,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-30 22:57:40,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:57:40,703 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:57:40,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:57:40,704 INFO L85 PathProgramCache]: Analyzing trace with hash 715769748, now seen corresponding path program 2 times [2022-01-30 22:57:40,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:57:40,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322124778] [2022-01-30 22:57:40,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:57:40,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:57:40,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:40,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:57:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:40,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:57:40,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:40,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-30 22:57:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:40,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-30 22:57:40,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:40,829 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-30 22:57:40,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:57:40,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322124778] [2022-01-30 22:57:40,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322124778] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:57:40,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3873832] [2022-01-30 22:57:40,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:57:40,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:57:40,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:57:40,836 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) [2022-01-30 22:57:40,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-30 22:57:40,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:57:40,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:57:40,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-30 22:57:40,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:57:41,013 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-30 22:57:41,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:57:41,127 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-30 22:57:41,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3873832] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:57:41,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:57:41,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-01-30 22:57:41,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57975815] [2022-01-30 22:57:41,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:57:41,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-30 22:57:41,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:57:41,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-30 22:57:41,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-01-30 22:57:41,129 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-30 22:57:41,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:57:41,343 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2022-01-30 22:57:41,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-30 22:57:41,344 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2022-01-30 22:57:41,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:57:41,347 INFO L225 Difference]: With dead ends: 70 [2022-01-30 22:57:41,347 INFO L226 Difference]: Without dead ends: 50 [2022-01-30 22:57:41,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2022-01-30 22:57:41,350 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 42 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:57:41,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 40 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:57:41,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-30 22:57:41,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-01-30 22:57:41,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:57:41,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2022-01-30 22:57:41,363 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 48 [2022-01-30 22:57:41,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:57:41,363 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2022-01-30 22:57:41,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-30 22:57:41,363 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-01-30 22:57:41,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-30 22:57:41,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:57:41,364 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:57:41,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-30 22:57:41,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:57:41,579 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:57:41,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:57:41,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1150751298, now seen corresponding path program 3 times [2022-01-30 22:57:41,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:57:41,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336099535] [2022-01-30 22:57:41,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:57:41,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:57:41,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:41,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:57:41,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:41,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:57:41,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:41,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-30 22:57:41,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:41,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 22:57:41,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:41,644 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-01-30 22:57:41,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:57:41,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336099535] [2022-01-30 22:57:41,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336099535] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:57:41,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938423263] [2022-01-30 22:57:41,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 22:57:41,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:57:41,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:57:41,646 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) [2022-01-30 22:57:41,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-30 22:57:41,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-30 22:57:41,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:57:41,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 22:57:41,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:57:41,788 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-01-30 22:57:41,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:57:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-01-30 22:57:41,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938423263] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:57:41,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:57:41,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-30 22:57:41,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78976865] [2022-01-30 22:57:41,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:57:41,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 22:57:41,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:57:41,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 22:57:41,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-30 22:57:41,869 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-30 22:57:41,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:57:41,957 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2022-01-30 22:57:41,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 22:57:41,957 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), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2022-01-30 22:57:41,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:57:41,958 INFO L225 Difference]: With dead ends: 70 [2022-01-30 22:57:41,958 INFO L226 Difference]: Without dead ends: 55 [2022-01-30 22:57:41,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-30 22:57:41,959 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 26 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:57:41,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 47 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:57:41,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-30 22:57:41,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-01-30 22:57:41,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:57:41,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2022-01-30 22:57:41,965 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 66 [2022-01-30 22:57:41,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:57:41,965 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2022-01-30 22:57:41,965 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), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-30 22:57:41,965 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2022-01-30 22:57:41,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-30 22:57:41,966 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:57:41,966 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:57:41,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-30 22:57:42,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:57:42,180 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:57:42,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:57:42,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1303232968, now seen corresponding path program 4 times [2022-01-30 22:57:42,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:57:42,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601439813] [2022-01-30 22:57:42,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:57:42,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:57:42,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:42,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:57:42,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:42,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:57:42,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:42,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-30 22:57:42,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:42,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 22:57:42,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:42,274 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-01-30 22:57:42,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:57:42,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601439813] [2022-01-30 22:57:42,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601439813] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:57:42,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090492220] [2022-01-30 22:57:42,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 22:57:42,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:57:42,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:57:42,277 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) [2022-01-30 22:57:42,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-30 22:57:42,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 22:57:42,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:57:42,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-30 22:57:42,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:57:42,451 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-01-30 22:57:42,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:57:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-01-30 22:57:42,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090492220] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:57:42,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:57:42,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-30 22:57:42,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567817624] [2022-01-30 22:57:42,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:57:42,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-30 22:57:42,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:57:42,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-30 22:57:42,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-30 22:57:42,567 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:57:42,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:57:42,671 INFO L93 Difference]: Finished difference Result 90 states and 103 transitions. [2022-01-30 22:57:42,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-30 22:57:42,671 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2022-01-30 22:57:42,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:57:42,675 INFO L225 Difference]: With dead ends: 90 [2022-01-30 22:57:42,675 INFO L226 Difference]: Without dead ends: 63 [2022-01-30 22:57:42,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-01-30 22:57:42,678 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:57:42,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 42 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:57:42,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-30 22:57:42,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-01-30 22:57:42,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:57:42,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2022-01-30 22:57:42,694 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 72 [2022-01-30 22:57:42,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:57:42,694 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2022-01-30 22:57:42,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:57:42,695 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2022-01-30 22:57:42,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-30 22:57:42,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:57:42,696 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 10, 10, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:57:42,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-30 22:57:42,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:57:42,897 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:57:42,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:57:42,897 INFO L85 PathProgramCache]: Analyzing trace with hash 2000079024, now seen corresponding path program 5 times [2022-01-30 22:57:42,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:57:42,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058423132] [2022-01-30 22:57:42,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:57:42,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:57:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:43,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:57:43,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:43,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:57:43,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:43,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-30 22:57:43,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:43,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-01-30 22:57:43,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:43,029 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-01-30 22:57:43,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:57:43,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058423132] [2022-01-30 22:57:43,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058423132] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:57:43,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243503964] [2022-01-30 22:57:43,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 22:57:43,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:57:43,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:57:43,031 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) [2022-01-30 22:57:43,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-30 22:57:43,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-01-30 22:57:43,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:57:43,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-30 22:57:43,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:57:43,438 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-01-30 22:57:43,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:57:43,668 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2022-01-30 22:57:43,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243503964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:57:43,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:57:43,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 28 [2022-01-30 22:57:43,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109591313] [2022-01-30 22:57:43,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:57:43,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-30 22:57:43,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:57:43,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-30 22:57:43,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=557, Unknown=0, NotChecked=0, Total=756 [2022-01-30 22:57:43,671 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:57:44,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:57:44,102 INFO L93 Difference]: Finished difference Result 118 states and 137 transitions. [2022-01-30 22:57:44,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-30 22:57:44,102 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 96 [2022-01-30 22:57:44,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:57:44,103 INFO L225 Difference]: With dead ends: 118 [2022-01-30 22:57:44,103 INFO L226 Difference]: Without dead ends: 82 [2022-01-30 22:57:44,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=591, Invalid=2165, Unknown=0, NotChecked=0, Total=2756 [2022-01-30 22:57:44,105 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 68 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:57:44,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 50 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:57:44,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-30 22:57:44,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2022-01-30 22:57:44,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 73 states have internal predecessors, (76), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:57:44,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2022-01-30 22:57:44,111 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 96 [2022-01-30 22:57:44,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:57:44,111 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2022-01-30 22:57:44,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:57:44,112 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2022-01-30 22:57:44,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-30 22:57:44,113 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:57:44,113 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 11, 11, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:57:44,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-30 22:57:44,327 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,SelfDestructingSolverStorable8 [2022-01-30 22:57:44,328 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:57:44,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:57:44,328 INFO L85 PathProgramCache]: Analyzing trace with hash 2054944514, now seen corresponding path program 6 times [2022-01-30 22:57:44,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:57:44,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551680663] [2022-01-30 22:57:44,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:57:44,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:57:44,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:44,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:57:44,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:44,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-30 22:57:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:44,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-30 22:57:44,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:44,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-01-30 22:57:44,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:44,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2000 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1879 trivial. 0 not checked. [2022-01-30 22:57:44,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:57:44,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551680663] [2022-01-30 22:57:44,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551680663] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:57:44,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387282662] [2022-01-30 22:57:44,469 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-30 22:57:44,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:57:44,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:57:44,470 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) [2022-01-30 22:57:44,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-30 22:57:44,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-30 22:57:44,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:57:44,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-30 22:57:44,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:57:44,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2000 backedges. 850 proven. 16 refuted. 0 times theorem prover too weak. 1134 trivial. 0 not checked. [2022-01-30 22:57:44,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:57:45,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2000 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2022-01-30 22:57:45,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387282662] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:57:45,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:57:45,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 7] total 25 [2022-01-30 22:57:45,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317362816] [2022-01-30 22:57:45,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:57:45,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-30 22:57:45,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:57:45,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-30 22:57:45,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2022-01-30 22:57:45,187 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:57:45,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:57:45,583 INFO L93 Difference]: Finished difference Result 148 states and 162 transitions. [2022-01-30 22:57:45,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-30 22:57:45,583 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 146 [2022-01-30 22:57:45,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:57:45,584 INFO L225 Difference]: With dead ends: 148 [2022-01-30 22:57:45,584 INFO L226 Difference]: Without dead ends: 96 [2022-01-30 22:57:45,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=468, Invalid=1694, Unknown=0, NotChecked=0, Total=2162 [2022-01-30 22:57:45,586 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 67 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:57:45,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 60 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:57:45,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-30 22:57:45,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2022-01-30 22:57:45,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 87 states have internal predecessors, (90), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:57:45,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2022-01-30 22:57:45,596 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 146 [2022-01-30 22:57:45,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:57:45,596 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2022-01-30 22:57:45,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:57:45,596 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2022-01-30 22:57:45,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-30 22:57:45,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:57:45,598 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 12, 12, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:57:45,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-30 22:57:45,811 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,SelfDestructingSolverStorable9 [2022-01-30 22:57:45,811 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:57:45,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:57:45,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1088621656, now seen corresponding path program 7 times [2022-01-30 22:57:45,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:57:45,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467476730] [2022-01-30 22:57:45,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:57:45,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:57:45,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:45,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:57:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:45,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-30 22:57:45,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:45,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-30 22:57:45,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:45,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-01-30 22:57:45,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2107 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-30 22:57:45,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:57:45,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467476730] [2022-01-30 22:57:45,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467476730] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:57:45,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550360533] [2022-01-30 22:57:45,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-30 22:57:45,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:57:45,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:57:45,977 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:57:45,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-30 22:57:46,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:46,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-30 22:57:46,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:57:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2107 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-30 22:57:46,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:57:46,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2107 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-30 22:57:46,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550360533] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:57:46,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:57:46,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-01-30 22:57:46,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253602245] [2022-01-30 22:57:46,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:57:46,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-30 22:57:46,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:57:46,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-30 22:57:46,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-30 22:57:46,703 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 states have internal predecessors, (79), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:57:47,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:57:47,111 INFO L93 Difference]: Finished difference Result 187 states and 208 transitions. [2022-01-30 22:57:47,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-30 22:57:47,112 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 states have internal predecessors, (79), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 160 [2022-01-30 22:57:47,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:57:47,113 INFO L225 Difference]: With dead ends: 187 [2022-01-30 22:57:47,113 INFO L226 Difference]: Without dead ends: 123 [2022-01-30 22:57:47,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1163, Invalid=1917, Unknown=0, NotChecked=0, Total=3080 [2022-01-30 22:57:47,114 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 83 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:57:47,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 42 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:57:47,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-01-30 22:57:47,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-01-30 22:57:47,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 115 states have (on average 1.0260869565217392) internal successors, (118), 115 states have internal predecessors, (118), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:57:47,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 127 transitions. [2022-01-30 22:57:47,121 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 127 transitions. Word has length 160 [2022-01-30 22:57:47,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:57:47,121 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 127 transitions. [2022-01-30 22:57:47,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 states have internal predecessors, (79), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:57:47,121 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 127 transitions. [2022-01-30 22:57:47,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-30 22:57:47,123 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:57:47,123 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 26, 26, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:57:47,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-30 22:57:47,339 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,SelfDestructingSolverStorable10 [2022-01-30 22:57:47,339 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:57:47,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:57:47,340 INFO L85 PathProgramCache]: Analyzing trace with hash -682710476, now seen corresponding path program 8 times [2022-01-30 22:57:47,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:57:47,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945365907] [2022-01-30 22:57:47,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:57:47,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:57:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:47,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:57:47,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:47,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 22:57:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:47,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-30 22:57:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:47,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-01-30 22:57:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:47,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2639 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-30 22:57:47,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:57:47,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945365907] [2022-01-30 22:57:47,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945365907] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:57:47,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409907895] [2022-01-30 22:57:47,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:57:47,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:57:47,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:57:47,732 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) [2022-01-30 22:57:47,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-30 22:57:47,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:57:47,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:57:47,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-30 22:57:47,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:57:48,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2639 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-30 22:57:48,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:57:49,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2639 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-30 22:57:49,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409907895] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:57:49,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:57:49,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-01-30 22:57:49,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910859526] [2022-01-30 22:57:49,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:57:49,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-30 22:57:49,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:57:49,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-30 22:57:49,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-30 22:57:49,233 INFO L87 Difference]: Start difference. First operand 123 states and 127 transitions. Second operand has 58 states, 58 states have (on average 2.3275862068965516) internal successors, (135), 57 states have internal predecessors, (135), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:57:50,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:57:50,537 INFO L93 Difference]: Finished difference Result 243 states and 278 transitions. [2022-01-30 22:57:50,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-30 22:57:50,538 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.3275862068965516) internal successors, (135), 57 states have internal predecessors, (135), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 188 [2022-01-30 22:57:50,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:57:50,539 INFO L225 Difference]: With dead ends: 243 [2022-01-30 22:57:50,539 INFO L226 Difference]: Without dead ends: 179 [2022-01-30 22:57:50,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1938 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4677, Invalid=7755, Unknown=0, NotChecked=0, Total=12432 [2022-01-30 22:57:50,542 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 126 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 22:57:50,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 52 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 22:57:50,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-01-30 22:57:50,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-01-30 22:57:50,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 171 states have (on average 1.0175438596491229) internal successors, (174), 171 states have internal predecessors, (174), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:57:50,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 183 transitions. [2022-01-30 22:57:50,549 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 183 transitions. Word has length 188 [2022-01-30 22:57:50,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:57:50,549 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 183 transitions. [2022-01-30 22:57:50,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.3275862068965516) internal successors, (135), 57 states have internal predecessors, (135), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:57:50,550 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 183 transitions. [2022-01-30 22:57:50,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-01-30 22:57:50,552 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:57:50,552 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 42, 42, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:57:50,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-30 22:57:50,771 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,SelfDestructingSolverStorable11 [2022-01-30 22:57:50,771 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:57:50,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:57:50,772 INFO L85 PathProgramCache]: Analyzing trace with hash -584220692, now seen corresponding path program 9 times [2022-01-30 22:57:50,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:57:50,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347922276] [2022-01-30 22:57:50,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:57:50,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:57:50,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:51,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:57:51,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:51,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-01-30 22:57:51,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:51,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-30 22:57:51,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:51,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-01-30 22:57:51,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:51,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4879 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-30 22:57:51,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:57:51,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347922276] [2022-01-30 22:57:51,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347922276] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:57:51,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084004600] [2022-01-30 22:57:51,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 22:57:51,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:57:51,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:57:51,960 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) [2022-01-30 22:57:51,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-30 22:57:52,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-01-30 22:57:52,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:57:52,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-30 22:57:52,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:57:53,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4879 backedges. 850 proven. 100 refuted. 0 times theorem prover too weak. 3929 trivial. 0 not checked. [2022-01-30 22:57:53,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:57:53,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4879 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4779 trivial. 0 not checked. [2022-01-30 22:57:53,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084004600] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:57:53,717 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:57:53,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 13, 13] total 80 [2022-01-30 22:57:53,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994901042] [2022-01-30 22:57:53,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:57:53,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-30 22:57:53,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:57:53,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-30 22:57:53,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1873, Invalid=4447, Unknown=0, NotChecked=0, Total=6320 [2022-01-30 22:57:53,720 INFO L87 Difference]: Start difference. First operand 179 states and 183 transitions. Second operand has 80 states, 80 states have (on average 2.2875) internal successors, (183), 79 states have internal predecessors, (183), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:57:55,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:57:55,868 INFO L93 Difference]: Finished difference Result 270 states and 290 transitions. [2022-01-30 22:57:55,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-30 22:57:55,868 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.2875) internal successors, (183), 79 states have internal predecessors, (183), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 244 [2022-01-30 22:57:55,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:57:55,870 INFO L225 Difference]: With dead ends: 270 [2022-01-30 22:57:55,870 INFO L226 Difference]: Without dead ends: 206 [2022-01-30 22:57:55,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 629 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4763 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5613, Invalid=18879, Unknown=0, NotChecked=0, Total=24492 [2022-01-30 22:57:55,876 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 183 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-30 22:57:55,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 60 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-30 22:57:55,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-30 22:57:55,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2022-01-30 22:57:55,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 197 states have (on average 1.015228426395939) internal successors, (200), 197 states have internal predecessors, (200), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:57:55,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 209 transitions. [2022-01-30 22:57:55,883 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 209 transitions. Word has length 244 [2022-01-30 22:57:55,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:57:55,883 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 209 transitions. [2022-01-30 22:57:55,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.2875) internal successors, (183), 79 states have internal predecessors, (183), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:57:55,883 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 209 transitions. [2022-01-30 22:57:55,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-01-30 22:57:55,886 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:57:55,886 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 42, 42, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:57:55,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-01-30 22:57:56,099 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,SelfDestructingSolverStorable12 [2022-01-30 22:57:56,099 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:57:56,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:57:56,100 INFO L85 PathProgramCache]: Analyzing trace with hash 213038390, now seen corresponding path program 10 times [2022-01-30 22:57:56,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:57:56,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953526849] [2022-01-30 22:57:56,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:57:56,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:57:56,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:57,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:57:57,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:57,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-01-30 22:57:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:57,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-30 22:57:57,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:57,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2022-01-30 22:57:57,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:57:57,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5372 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 2347 trivial. 0 not checked. [2022-01-30 22:57:57,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:57:57,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953526849] [2022-01-30 22:57:57,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953526849] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:57:57,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628599561] [2022-01-30 22:57:57,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 22:57:57,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:57:57,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:57:57,292 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) [2022-01-30 22:57:57,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-30 22:57:57,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 22:57:57,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:57:57,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-30 22:57:57,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:57:58,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5372 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4328 trivial. 0 not checked. [2022-01-30 22:57:58,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:57:58,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5372 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4328 trivial. 0 not checked. [2022-01-30 22:57:58,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628599561] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:57:58,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:57:58,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 17, 17] total 89 [2022-01-30 22:57:58,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725880703] [2022-01-30 22:57:58,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:57:58,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-30 22:57:58,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:57:58,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-30 22:57:58,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2150, Invalid=5682, Unknown=0, NotChecked=0, Total=7832 [2022-01-30 22:57:58,838 INFO L87 Difference]: Start difference. First operand 205 states and 209 transitions. Second operand has 89 states, 89 states have (on average 2.269662921348315) internal successors, (202), 88 states have internal predecessors, (202), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:58:01,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:58:01,321 INFO L93 Difference]: Finished difference Result 328 states and 355 transitions. [2022-01-30 22:58:01,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-30 22:58:01,322 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.269662921348315) internal successors, (202), 88 states have internal predecessors, (202), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 270 [2022-01-30 22:58:01,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:58:01,323 INFO L225 Difference]: With dead ends: 328 [2022-01-30 22:58:01,323 INFO L226 Difference]: Without dead ends: 240 [2022-01-30 22:58:01,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6235 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=6444, Invalid=24006, Unknown=0, NotChecked=0, Total=30450 [2022-01-30 22:58:01,327 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 205 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-30 22:58:01,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 90 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-30 22:58:01,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-01-30 22:58:01,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2022-01-30 22:58:01,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 231 states have (on average 1.0129870129870129) internal successors, (234), 231 states have internal predecessors, (234), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:58:01,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 243 transitions. [2022-01-30 22:58:01,337 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 243 transitions. Word has length 270 [2022-01-30 22:58:01,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:58:01,337 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 243 transitions. [2022-01-30 22:58:01,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.269662921348315) internal successors, (202), 88 states have internal predecessors, (202), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:58:01,337 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 243 transitions. [2022-01-30 22:58:01,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2022-01-30 22:58:01,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:58:01,339 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 56, 56, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:58:01,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-30 22:58:01,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-30 22:58:01,547 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:58:01,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:58:01,548 INFO L85 PathProgramCache]: Analyzing trace with hash 45117688, now seen corresponding path program 11 times [2022-01-30 22:58:01,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:58:01,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065379871] [2022-01-30 22:58:01,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:58:01,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:58:01,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:58:02,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:58:02,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:58:02,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-01-30 22:58:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:58:02,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-01-30 22:58:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:58:02,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 299 [2022-01-30 22:58:02,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:58:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 11915 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 8779 trivial. 0 not checked. [2022-01-30 22:58:02,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:58:02,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065379871] [2022-01-30 22:58:02,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065379871] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:58:02,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581146586] [2022-01-30 22:58:02,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 22:58:02,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:58:02,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:58:02,784 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) [2022-01-30 22:58:02,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process