/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/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/reducercommutativity/sep05-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 18:36:14,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 18:36:14,482 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 18:36:14,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 18:36:14,548 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 18:36:14,549 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 18:36:14,553 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 18:36:14,555 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 18:36:14,555 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 18:36:14,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 18:36:14,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 18:36:14,562 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 18:36:14,563 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 18:36:14,564 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 18:36:14,565 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 18:36:14,566 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 18:36:14,570 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 18:36:14,576 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 18:36:14,577 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 18:36:14,577 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 18:36:14,578 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 18:36:14,588 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 18:36:14,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 18:36:14,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 18:36:14,589 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 18:36:14,589 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 18:36:14,589 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 18:36:14,589 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 18:36:14,589 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 18:36:14,589 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 18:36:14,590 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 18:36:14,590 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 18:36:14,590 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 18:36:14,590 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 18:36:14,590 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 18:36:14,590 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 18:36:14,591 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 18:36:14,591 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 18:36:14,591 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 18:36:14,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 18:36:14,591 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 18:36:14,591 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 18:36:14,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 18:36:14,591 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 18:36:14,591 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 18:36:14,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 18:36:14,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 18:36:14,774 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 18:36:14,774 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 18:36:14,778 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 18:36:14,779 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep05-1.i [2022-01-31 18:36:14,821 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/042d4400e/f3690e58305249ebbbf58714bc8d8f9e/FLAG83bad280e [2022-01-31 18:36:15,161 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 18:36:15,162 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep05-1.i [2022-01-31 18:36:15,166 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/042d4400e/f3690e58305249ebbbf58714bc8d8f9e/FLAG83bad280e [2022-01-31 18:36:15,175 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/042d4400e/f3690e58305249ebbbf58714bc8d8f9e [2022-01-31 18:36:15,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 18:36:15,179 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 18:36:15,182 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 18:36:15,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 18:36:15,184 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 18:36:15,185 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 06:36:15" (1/1) ... [2022-01-31 18:36:15,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24e3c433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:36:15, skipping insertion in model container [2022-01-31 18:36:15,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 06:36:15" (1/1) ... [2022-01-31 18:36:15,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 18:36:15,203 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 18:36:15,345 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep05-1.i[1287,1300] [2022-01-31 18:36:15,347 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 18:36:15,353 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 18:36:15,379 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep05-1.i[1287,1300] [2022-01-31 18:36:15,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 18:36:15,389 INFO L208 MainTranslator]: Completed translation [2022-01-31 18:36:15,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:36:15 WrapperNode [2022-01-31 18:36:15,390 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 18:36:15,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 18:36:15,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 18:36:15,391 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 18:36:15,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:36:15" (1/1) ... [2022-01-31 18:36:15,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:36:15" (1/1) ... [2022-01-31 18:36:15,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:36:15" (1/1) ... [2022-01-31 18:36:15,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:36:15" (1/1) ... [2022-01-31 18:36:15,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:36:15" (1/1) ... [2022-01-31 18:36:15,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:36:15" (1/1) ... [2022-01-31 18:36:15,421 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:36:15" (1/1) ... [2022-01-31 18:36:15,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 18:36:15,425 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 18:36:15,425 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 18:36:15,425 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 18:36:15,426 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:36:15" (1/1) ... [2022-01-31 18:36:15,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 18:36:15,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 18:36:15,453 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) [2022-01-31 18:36:15,460 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 [2022-01-31 18:36:15,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 18:36:15,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 18:36:15,488 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 18:36:15,488 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2022-01-31 18:36:15,488 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 18:36:15,488 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 18:36:15,489 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 18:36:15,489 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 18:36:15,489 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 18:36:15,489 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 18:36:15,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 18:36:15,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 18:36:15,489 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2022-01-31 18:36:15,489 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 18:36:15,489 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 18:36:15,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 18:36:15,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 18:36:15,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 18:36:15,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 18:36:15,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 18:36:15,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 18:36:15,549 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 18:36:15,550 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 18:36:15,647 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 18:36:15,651 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 18:36:15,652 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 18:36:15,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 06:36:15 BoogieIcfgContainer [2022-01-31 18:36:15,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 18:36:15,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 18:36:15,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 18:36:15,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 18:36:15,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 06:36:15" (1/3) ... [2022-01-31 18:36:15,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c6060cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 06:36:15, skipping insertion in model container [2022-01-31 18:36:15,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:36:15" (2/3) ... [2022-01-31 18:36:15,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c6060cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 06:36:15, skipping insertion in model container [2022-01-31 18:36:15,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 06:36:15" (3/3) ... [2022-01-31 18:36:15,659 INFO L111 eAbstractionObserver]: Analyzing ICFG sep05-1.i [2022-01-31 18:36:15,662 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 18:36:15,663 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 18:36:15,729 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 18:36:15,734 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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=JORDAN [2022-01-31 18:36:15,734 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 18:36:15,744 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 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) [2022-01-31 18:36:15,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 18:36:15,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:15,750 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] [2022-01-31 18:36:15,750 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:15,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:15,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1340267542, now seen corresponding path program 1 times [2022-01-31 18:36:15,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:15,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209388956] [2022-01-31 18:36:15,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:15,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:15,838 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:15,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:15,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:15,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 18:36:15,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:15,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 18:36:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:15,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 18:36:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:15,990 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 18:36:15,991 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:15,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209388956] [2022-01-31 18:36:15,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1209388956] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:15,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:15,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 18:36:15,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226700238] [2022-01-31 18:36:15,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:15,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 18:36:15,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:16,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 18:36:16,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 18:36:16,029 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 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) [2022-01-31 18:36:16,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:16,070 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2022-01-31 18:36:16,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 18:36:16,075 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 [2022-01-31 18:36:16,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:16,081 INFO L225 Difference]: With dead ends: 56 [2022-01-31 18:36:16,081 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 18:36:16,084 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 [2022-01-31 18:36:16,090 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 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 [2022-01-31 18:36:16,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 18:36:16,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 18:36:16,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-31 18:36:16,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 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) [2022-01-31 18:36:16,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-01-31 18:36:16,117 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 32 [2022-01-31 18:36:16,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:16,117 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-01-31 18:36:16,117 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) [2022-01-31 18:36:16,117 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-01-31 18:36:16,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 18:36:16,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:16,119 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] [2022-01-31 18:36:16,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 18:36:16,120 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:16,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:16,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1608249685, now seen corresponding path program 1 times [2022-01-31 18:36:16,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:16,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22245681] [2022-01-31 18:36:16,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:16,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:16,123 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:16,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:16,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:16,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:16,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 18:36:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:16,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 18:36:16,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:16,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 18:36:16,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:16,213 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 18:36:16,214 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:16,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22245681] [2022-01-31 18:36:16,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [22245681] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:16,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:16,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 18:36:16,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091332203] [2022-01-31 18:36:16,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:16,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 18:36:16,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:16,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 18:36:16,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 18:36:16,217 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 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) [2022-01-31 18:36:16,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:16,326 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2022-01-31 18:36:16,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 18:36:16,326 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 [2022-01-31 18:36:16,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:16,327 INFO L225 Difference]: With dead ends: 51 [2022-01-31 18:36:16,327 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 18:36:16,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-31 18:36:16,329 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 29 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:16,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 37 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:36:16,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 18:36:16,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2022-01-31 18:36:16,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 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) [2022-01-31 18:36:16,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-01-31 18:36:16,336 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 32 [2022-01-31 18:36:16,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:16,337 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-01-31 18:36:16,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2022-01-31 18:36:16,337 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-01-31 18:36:16,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 18:36:16,338 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:16,338 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2022-01-31 18:36:16,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 18:36:16,338 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:16,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:16,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1532493389, now seen corresponding path program 1 times [2022-01-31 18:36:16,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:16,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290495148] [2022-01-31 18:36:16,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:16,351 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:36:16,352 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:36:16,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:16,353 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:16,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:16,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 18:36:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:16,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 18:36:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:16,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 18:36:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:16,469 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 18:36:16,470 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:16,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290495148] [2022-01-31 18:36:16,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1290495148] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:16,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:16,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 18:36:16,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051799419] [2022-01-31 18:36:16,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:16,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 18:36:16,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:16,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 18:36:16,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 18:36:16,472 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 18:36:16,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:16,544 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2022-01-31 18:36:16,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 18:36:16,544 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2022-01-31 18:36:16,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:16,545 INFO L225 Difference]: With dead ends: 52 [2022-01-31 18:36:16,545 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 18:36:16,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 18:36:16,547 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 25 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:16,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 34 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 18:36:16,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 18:36:16,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-01-31 18:36:16,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 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) [2022-01-31 18:36:16,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-01-31 18:36:16,553 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 43 [2022-01-31 18:36:16,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:16,553 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-01-31 18:36:16,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 18:36:16,553 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-01-31 18:36:16,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 18:36:16,554 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:16,554 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:36:16,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 18:36:16,555 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:16,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:16,555 INFO L85 PathProgramCache]: Analyzing trace with hash -2027602479, now seen corresponding path program 2 times [2022-01-31 18:36:16,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:16,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823929407] [2022-01-31 18:36:16,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:16,558 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:36:16,558 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:36:16,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:16,559 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:16,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:16,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:16,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:16,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 18:36:16,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:16,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 18:36:16,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:16,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 18:36:16,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-31 18:36:16,672 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:16,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823929407] [2022-01-31 18:36:16,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1823929407] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:16,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:16,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 18:36:16,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840513101] [2022-01-31 18:36:16,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:16,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 18:36:16,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:16,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 18:36:16,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 18:36:16,676 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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) [2022-01-31 18:36:16,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:16,766 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2022-01-31 18:36:16,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 18:36:16,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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 45 [2022-01-31 18:36:16,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:16,769 INFO L225 Difference]: With dead ends: 55 [2022-01-31 18:36:16,769 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 18:36:16,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 18:36:16,770 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:16,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 39 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 18:36:16,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 18:36:16,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-01-31 18:36:16,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 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) [2022-01-31 18:36:16,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-01-31 18:36:16,778 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 45 [2022-01-31 18:36:16,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:16,778 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-01-31 18:36:16,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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) [2022-01-31 18:36:16,778 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-01-31 18:36:16,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 18:36:16,782 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:16,782 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:36:16,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 18:36:16,783 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:16,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:16,783 INFO L85 PathProgramCache]: Analyzing trace with hash 635118767, now seen corresponding path program 3 times [2022-01-31 18:36:16,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:16,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663133107] [2022-01-31 18:36:16,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:16,786 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:36:16,786 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:36:16,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:16,788 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:16,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:16,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:16,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 18:36:16,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:16,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 18:36:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:16,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:36:16,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:16,881 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-31 18:36:16,882 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:16,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663133107] [2022-01-31 18:36:16,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1663133107] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:16,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:16,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 18:36:16,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725480287] [2022-01-31 18:36:16,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:16,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 18:36:16,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:16,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 18:36:16,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 18:36:16,883 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 18:36:16,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:16,950 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2022-01-31 18:36:16,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 18:36:16,950 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2022-01-31 18:36:16,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:16,951 INFO L225 Difference]: With dead ends: 53 [2022-01-31 18:36:16,951 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 18:36:16,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 18:36:16,953 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 23 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:16,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 34 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:36:16,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 18:36:16,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-01-31 18:36:16,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 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) [2022-01-31 18:36:16,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-01-31 18:36:16,959 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 54 [2022-01-31 18:36:16,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:16,961 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-01-31 18:36:16,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 18:36:16,961 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-01-31 18:36:16,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 18:36:16,962 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:16,962 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:36:16,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 18:36:16,962 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:16,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:16,964 INFO L85 PathProgramCache]: Analyzing trace with hash -2012658963, now seen corresponding path program 1 times [2022-01-31 18:36:16,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:16,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280693239] [2022-01-31 18:36:16,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:16,967 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:36:16,967 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:36:16,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:16,968 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:17,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:17,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 18:36:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:17,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 18:36:17,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:17,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 18:36:17,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:17,049 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-31 18:36:17,049 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:17,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280693239] [2022-01-31 18:36:17,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1280693239] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:17,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:17,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 18:36:17,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704511723] [2022-01-31 18:36:17,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:17,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 18:36:17,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:17,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 18:36:17,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 18:36:17,051 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 18:36:17,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:17,121 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2022-01-31 18:36:17,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 18:36:17,121 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2022-01-31 18:36:17,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:17,123 INFO L225 Difference]: With dead ends: 55 [2022-01-31 18:36:17,123 INFO L226 Difference]: Without dead ends: 38 [2022-01-31 18:36:17,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 18:36:17,129 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:17,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 39 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 18:36:17,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-31 18:36:17,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-01-31 18:36:17,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 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) [2022-01-31 18:36:17,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-01-31 18:36:17,142 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 56 [2022-01-31 18:36:17,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:17,142 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-01-31 18:36:17,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 18:36:17,142 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-01-31 18:36:17,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 18:36:17,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:17,143 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:36:17,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 18:36:17,143 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:17,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:17,143 INFO L85 PathProgramCache]: Analyzing trace with hash 388549035, now seen corresponding path program 2 times [2022-01-31 18:36:17,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:17,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271749390] [2022-01-31 18:36:17,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:17,145 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:36:17,145 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:36:17,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:17,146 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:17,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:17,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:17,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 18:36:17,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:17,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 18:36:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:17,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 18:36:17,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-31 18:36:17,290 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:17,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271749390] [2022-01-31 18:36:17,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [271749390] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:17,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:17,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 18:36:17,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459246740] [2022-01-31 18:36:17,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:17,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 18:36:17,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:17,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 18:36:17,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 18:36:17,292 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 18:36:17,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:17,352 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2022-01-31 18:36:17,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 18:36:17,352 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2022-01-31 18:36:17,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:17,354 INFO L225 Difference]: With dead ends: 66 [2022-01-31 18:36:17,354 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 18:36:17,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 18:36:17,356 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:17,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 34 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 18:36:17,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 18:36:17,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-01-31 18:36:17,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 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) [2022-01-31 18:36:17,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-01-31 18:36:17,371 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 58 [2022-01-31 18:36:17,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:17,371 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-01-31 18:36:17,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 18:36:17,371 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-01-31 18:36:17,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 18:36:17,376 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:17,376 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:36:17,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 18:36:17,376 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:17,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:17,377 INFO L85 PathProgramCache]: Analyzing trace with hash -366735923, now seen corresponding path program 3 times [2022-01-31 18:36:17,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:17,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644997468] [2022-01-31 18:36:17,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:17,380 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:36:17,380 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:36:17,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:17,381 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:17,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:17,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:17,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 18:36:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:17,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 18:36:17,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:17,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 18:36:17,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:17,495 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-31 18:36:17,496 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:17,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644997468] [2022-01-31 18:36:17,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1644997468] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:17,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:17,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 18:36:17,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494463531] [2022-01-31 18:36:17,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:17,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 18:36:17,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:17,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 18:36:17,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 18:36:17,497 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 18:36:17,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:17,595 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2022-01-31 18:36:17,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 18:36:17,596 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2022-01-31 18:36:17,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:17,596 INFO L225 Difference]: With dead ends: 68 [2022-01-31 18:36:17,597 INFO L226 Difference]: Without dead ends: 42 [2022-01-31 18:36:17,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-31 18:36:17,597 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 29 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:17,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 44 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:36:17,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-31 18:36:17,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-01-31 18:36:17,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 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) [2022-01-31 18:36:17,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-01-31 18:36:17,602 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 60 [2022-01-31 18:36:17,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:17,603 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-01-31 18:36:17,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 18:36:17,603 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-01-31 18:36:17,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 18:36:17,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:17,604 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:36:17,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 18:36:17,604 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:17,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:17,604 INFO L85 PathProgramCache]: Analyzing trace with hash -346107537, now seen corresponding path program 4 times [2022-01-31 18:36:17,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:17,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010366745] [2022-01-31 18:36:17,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:17,606 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:36:17,606 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:36:17,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:17,607 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:17,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:17,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:17,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:17,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 18:36:17,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:17,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 18:36:17,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:17,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 18:36:17,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:17,678 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-31 18:36:17,679 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:17,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010366745] [2022-01-31 18:36:17,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2010366745] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:17,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:17,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 18:36:17,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457020827] [2022-01-31 18:36:17,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:17,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 18:36:17,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:17,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 18:36:17,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 18:36:17,680 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 18:36:17,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:17,771 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2022-01-31 18:36:17,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 18:36:17,773 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 62 [2022-01-31 18:36:17,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:17,773 INFO L225 Difference]: With dead ends: 69 [2022-01-31 18:36:17,773 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 18:36:17,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 18:36:17,775 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 30 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:17,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 39 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 18:36:17,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 18:36:17,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-01-31 18:36:17,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 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) [2022-01-31 18:36:17,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-01-31 18:36:17,782 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 62 [2022-01-31 18:36:17,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:17,782 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-01-31 18:36:17,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 18:36:17,783 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-01-31 18:36:17,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 18:36:17,783 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:17,783 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:36:17,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 18:36:17,783 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:17,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:17,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1997065071, now seen corresponding path program 5 times [2022-01-31 18:36:17,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:17,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414931845] [2022-01-31 18:36:17,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:17,785 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:36:17,785 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:36:17,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:17,786 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:17,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:17,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:36:17,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:17,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 18:36:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:17,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-31 18:36:17,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-31 18:36:17,864 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:17,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414931845] [2022-01-31 18:36:17,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1414931845] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:17,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:17,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 18:36:17,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325443155] [2022-01-31 18:36:17,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:17,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 18:36:17,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:17,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 18:36:17,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 18:36:17,865 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 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) [2022-01-31 18:36:17,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:17,934 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2022-01-31 18:36:17,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 18:36:17,934 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 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 64 [2022-01-31 18:36:17,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:17,935 INFO L225 Difference]: With dead ends: 73 [2022-01-31 18:36:17,935 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 18:36:17,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 18:36:17,936 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:17,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 34 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 18:36:17,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 18:36:17,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-01-31 18:36:17,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 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) [2022-01-31 18:36:17,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-01-31 18:36:17,941 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 64 [2022-01-31 18:36:17,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:17,941 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-01-31 18:36:17,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 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) [2022-01-31 18:36:17,941 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-01-31 18:36:17,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 18:36:17,942 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:17,942 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:36:17,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 18:36:17,942 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:17,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:17,942 INFO L85 PathProgramCache]: Analyzing trace with hash -618891793, now seen corresponding path program 6 times [2022-01-31 18:36:17,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:17,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261307000] [2022-01-31 18:36:17,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:17,944 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:36:17,944 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:36:17,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:17,945 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:17,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:17,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:17,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:36:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:18,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 18:36:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:18,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 18:36:18,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:18,018 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 18:36:18,019 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:18,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261307000] [2022-01-31 18:36:18,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1261307000] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:18,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:18,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 18:36:18,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057408392] [2022-01-31 18:36:18,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:18,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 18:36:18,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:18,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 18:36:18,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 18:36:18,020 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 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) [2022-01-31 18:36:18,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:18,097 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2022-01-31 18:36:18,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 18:36:18,097 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 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 73 [2022-01-31 18:36:18,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:18,098 INFO L225 Difference]: With dead ends: 79 [2022-01-31 18:36:18,098 INFO L226 Difference]: Without dead ends: 51 [2022-01-31 18:36:18,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-31 18:36:18,099 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 47 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:18,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 39 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 18:36:18,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-31 18:36:18,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2022-01-31 18:36:18,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 states have internal predecessors, (48), 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) [2022-01-31 18:36:18,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-01-31 18:36:18,106 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 73 [2022-01-31 18:36:18,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:18,106 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-01-31 18:36:18,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 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) [2022-01-31 18:36:18,106 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-01-31 18:36:18,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 18:36:18,107 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:18,107 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:36:18,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 18:36:18,107 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:18,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:18,108 INFO L85 PathProgramCache]: Analyzing trace with hash 829877073, now seen corresponding path program 7 times [2022-01-31 18:36:18,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:18,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880705476] [2022-01-31 18:36:18,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:18,110 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:36:18,110 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:36:18,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:18,111 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:18,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:18,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:18,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:18,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:36:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:18,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 18:36:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:18,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 18:36:18,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:18,196 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-31 18:36:18,196 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:18,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880705476] [2022-01-31 18:36:18,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1880705476] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:18,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:18,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 18:36:18,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847349887] [2022-01-31 18:36:18,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:18,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 18:36:18,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:18,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 18:36:18,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 18:36:18,198 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 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) [2022-01-31 18:36:18,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:18,282 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2022-01-31 18:36:18,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 18:36:18,282 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 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 82 [2022-01-31 18:36:18,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:18,283 INFO L225 Difference]: With dead ends: 83 [2022-01-31 18:36:18,283 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 18:36:18,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 18:36:18,284 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 52 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:18,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 39 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 18:36:18,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 18:36:18,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-01-31 18:36:18,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 states have internal predecessors, (52), 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) [2022-01-31 18:36:18,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2022-01-31 18:36:18,289 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 82 [2022-01-31 18:36:18,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:18,289 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2022-01-31 18:36:18,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 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) [2022-01-31 18:36:18,289 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2022-01-31 18:36:18,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 18:36:18,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:18,290 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:36:18,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 18:36:18,290 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:18,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:18,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1383361745, now seen corresponding path program 8 times [2022-01-31 18:36:18,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:18,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730075000] [2022-01-31 18:36:18,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:18,292 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:36:18,292 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:36:18,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:18,293 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:18,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:18,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:18,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:36:18,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:18,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:36:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:18,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-31 18:36:18,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:18,369 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 18:36:18,369 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:18,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730075000] [2022-01-31 18:36:18,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [730075000] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:18,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:18,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 18:36:18,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987807400] [2022-01-31 18:36:18,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:18,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 18:36:18,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:18,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 18:36:18,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 18:36:18,370 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 18:36:18,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:18,431 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2022-01-31 18:36:18,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 18:36:18,431 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 91 [2022-01-31 18:36:18,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:18,432 INFO L225 Difference]: With dead ends: 81 [2022-01-31 18:36:18,432 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 18:36:18,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 18:36:18,432 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:18,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 44 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 18:36:18,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 18:36:18,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-01-31 18:36:18,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 states have internal predecessors, (54), 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) [2022-01-31 18:36:18,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-01-31 18:36:18,437 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 91 [2022-01-31 18:36:18,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:18,438 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-01-31 18:36:18,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 18:36:18,438 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-01-31 18:36:18,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 18:36:18,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:18,438 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 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] [2022-01-31 18:36:18,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 18:36:18,438 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:18,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:18,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1466557745, now seen corresponding path program 9 times [2022-01-31 18:36:18,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:18,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110952591] [2022-01-31 18:36:18,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:18,440 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:36:18,440 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:36:18,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:18,441 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:18,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:18,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:18,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:36:18,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:18,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:36:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:18,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-31 18:36:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:18,512 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 18:36:18,512 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:18,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110952591] [2022-01-31 18:36:18,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2110952591] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:18,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:18,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 18:36:18,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075615156] [2022-01-31 18:36:18,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:18,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 18:36:18,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:18,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 18:36:18,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 18:36:18,513 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 18:36:18,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:18,580 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2022-01-31 18:36:18,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 18:36:18,581 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 93 [2022-01-31 18:36:18,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:18,581 INFO L225 Difference]: With dead ends: 82 [2022-01-31 18:36:18,581 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 18:36:18,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-31 18:36:18,582 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:18,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 44 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 18:36:18,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 18:36:18,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-01-31 18:36:18,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 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) [2022-01-31 18:36:18,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2022-01-31 18:36:18,587 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 93 [2022-01-31 18:36:18,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:18,588 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2022-01-31 18:36:18,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 18:36:18,588 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2022-01-31 18:36:18,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:36:18,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:18,588 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 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] [2022-01-31 18:36:18,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 18:36:18,589 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:18,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:18,589 INFO L85 PathProgramCache]: Analyzing trace with hash 50052787, now seen corresponding path program 10 times [2022-01-31 18:36:18,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:18,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941539854] [2022-01-31 18:36:18,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:18,590 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:36:18,591 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:36:18,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:18,592 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:18,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:18,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:18,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:18,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:36:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:18,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:36:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:19,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 18:36:19,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:19,191 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 18:36:19,191 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:19,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941539854] [2022-01-31 18:36:19,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [941539854] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:19,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:19,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 18:36:19,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291162348] [2022-01-31 18:36:19,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:19,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 18:36:19,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:19,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 18:36:19,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-01-31 18:36:19,192 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:36:19,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:19,819 INFO L93 Difference]: Finished difference Result 151 states and 209 transitions. [2022-01-31 18:36:19,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 18:36:19,819 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 95 [2022-01-31 18:36:19,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:19,824 INFO L225 Difference]: With dead ends: 151 [2022-01-31 18:36:19,824 INFO L226 Difference]: Without dead ends: 147 [2022-01-31 18:36:19,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-01-31 18:36:19,826 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 70 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:19,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 106 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:36:19,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-01-31 18:36:19,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 112. [2022-01-31 18:36:19,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 101 states have (on average 1.2574257425742574) internal successors, (127), 102 states have internal predecessors, (127), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-01-31 18:36:19,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 144 transitions. [2022-01-31 18:36:19,856 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 144 transitions. Word has length 95 [2022-01-31 18:36:19,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:19,856 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 144 transitions. [2022-01-31 18:36:19,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:36:19,856 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 144 transitions. [2022-01-31 18:36:19,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:36:19,858 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:19,858 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 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, 1] [2022-01-31 18:36:19,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 18:36:19,858 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:19,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:19,859 INFO L85 PathProgramCache]: Analyzing trace with hash 730111157, now seen corresponding path program 1 times [2022-01-31 18:36:19,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:19,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360543636] [2022-01-31 18:36:19,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:19,861 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:36:19,861 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:36:19,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:19,862 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:19,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:20,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:20,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:20,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:36:20,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:20,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:36:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:20,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 18:36:20,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:20,484 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 29 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 18:36:20,484 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:20,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360543636] [2022-01-31 18:36:20,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [360543636] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:20,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:20,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 18:36:20,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886840153] [2022-01-31 18:36:20,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:20,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 18:36:20,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:20,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 18:36:20,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2022-01-31 18:36:20,486 INFO L87 Difference]: Start difference. First operand 112 states and 144 transitions. Second operand has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:36:21,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:21,659 INFO L93 Difference]: Finished difference Result 284 states and 415 transitions. [2022-01-31 18:36:21,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 18:36:21,660 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 95 [2022-01-31 18:36:21,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:21,662 INFO L225 Difference]: With dead ends: 284 [2022-01-31 18:36:21,662 INFO L226 Difference]: Without dead ends: 280 [2022-01-31 18:36:21,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=274, Invalid=2696, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 18:36:21,664 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 117 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:21,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 122 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1271 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:36:21,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-01-31 18:36:21,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 243. [2022-01-31 18:36:21,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 222 states have (on average 1.3603603603603605) internal successors, (302), 229 states have internal predecessors, (302), 11 states have call successors, (11), 3 states have call predecessors, (11), 9 states have return successors, (59), 10 states have call predecessors, (59), 10 states have call successors, (59) [2022-01-31 18:36:21,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 372 transitions. [2022-01-31 18:36:21,699 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 372 transitions. Word has length 95 [2022-01-31 18:36:21,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:21,699 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 372 transitions. [2022-01-31 18:36:21,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:36:21,700 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 372 transitions. [2022-01-31 18:36:21,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:36:21,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:21,702 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 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, 1] [2022-01-31 18:36:21,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 18:36:21,702 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:21,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:21,702 INFO L85 PathProgramCache]: Analyzing trace with hash 308218225, now seen corresponding path program 2 times [2022-01-31 18:36:21,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:21,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554639009] [2022-01-31 18:36:21,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:21,704 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:36:21,704 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:36:21,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:21,705 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:22,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:22,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:36:22,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:22,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:36:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:22,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 18:36:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-31 18:36:22,427 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:22,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554639009] [2022-01-31 18:36:22,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1554639009] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:22,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:22,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 18:36:22,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581548302] [2022-01-31 18:36:22,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:22,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 18:36:22,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:22,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 18:36:22,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-01-31 18:36:22,428 INFO L87 Difference]: Start difference. First operand 243 states and 372 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:36:24,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:24,120 INFO L93 Difference]: Finished difference Result 709 states and 1124 transitions. [2022-01-31 18:36:24,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 18:36:24,121 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 95 [2022-01-31 18:36:24,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:24,125 INFO L225 Difference]: With dead ends: 709 [2022-01-31 18:36:24,125 INFO L226 Difference]: Without dead ends: 492 [2022-01-31 18:36:24,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=362, Invalid=3798, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 18:36:24,129 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 109 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 1873 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:24,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 125 Invalid, 1951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1873 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:36:24,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-01-31 18:36:24,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 461. [2022-01-31 18:36:24,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 425 states have (on average 1.336470588235294) internal successors, (568), 438 states have internal predecessors, (568), 19 states have call successors, (19), 4 states have call predecessors, (19), 16 states have return successors, (161), 18 states have call predecessors, (161), 18 states have call successors, (161) [2022-01-31 18:36:24,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 748 transitions. [2022-01-31 18:36:24,221 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 748 transitions. Word has length 95 [2022-01-31 18:36:24,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:24,222 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 748 transitions. [2022-01-31 18:36:24,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:36:24,222 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 748 transitions. [2022-01-31 18:36:24,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:36:24,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:24,226 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 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, 1] [2022-01-31 18:36:24,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 18:36:24,226 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:24,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:24,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1229810891, now seen corresponding path program 3 times [2022-01-31 18:36:24,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:24,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498410638] [2022-01-31 18:36:24,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:24,228 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:36:24,228 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:36:24,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:24,250 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:24,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:24,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:24,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:24,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:36:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:24,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:36:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:24,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 18:36:24,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:24,985 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 18:36:24,986 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:24,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498410638] [2022-01-31 18:36:24,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [498410638] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:24,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:24,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 18:36:24,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090641412] [2022-01-31 18:36:24,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:24,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 18:36:24,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:24,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 18:36:24,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-01-31 18:36:24,987 INFO L87 Difference]: Start difference. First operand 461 states and 748 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 27 states have internal predecessors, (68), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:36:26,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:26,657 INFO L93 Difference]: Finished difference Result 1183 states and 2041 transitions. [2022-01-31 18:36:26,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 18:36:26,657 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 27 states have internal predecessors, (68), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 95 [2022-01-31 18:36:26,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:26,667 INFO L225 Difference]: With dead ends: 1183 [2022-01-31 18:36:26,668 INFO L226 Difference]: Without dead ends: 807 [2022-01-31 18:36:26,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=410, Invalid=3750, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 18:36:26,676 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 121 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:26,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 93 Invalid, 1432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1321 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:36:26,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-01-31 18:36:26,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 794. [2022-01-31 18:36:26,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 732 states have (on average 1.3073770491803278) internal successors, (957), 755 states have internal predecessors, (957), 34 states have call successors, (34), 6 states have call predecessors, (34), 27 states have return successors, (395), 32 states have call predecessors, (395), 33 states have call successors, (395) [2022-01-31 18:36:26,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1386 transitions. [2022-01-31 18:36:26,842 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1386 transitions. Word has length 95 [2022-01-31 18:36:26,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:26,842 INFO L470 AbstractCegarLoop]: Abstraction has 794 states and 1386 transitions. [2022-01-31 18:36:26,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 27 states have internal predecessors, (68), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:36:26,842 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1386 transitions. [2022-01-31 18:36:26,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:36:26,851 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:26,851 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 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, 1] [2022-01-31 18:36:26,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 18:36:26,851 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:26,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:26,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1944091919, now seen corresponding path program 4 times [2022-01-31 18:36:26,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:26,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665967248] [2022-01-31 18:36:26,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:26,853 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:36:26,853 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:36:26,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:26,854 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:26,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:27,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:27,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:27,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:36:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:27,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:36:27,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:27,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 18:36:27,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:27,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 18:36:27,468 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:27,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665967248] [2022-01-31 18:36:27,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [665967248] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:27,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:27,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 18:36:27,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393335775] [2022-01-31 18:36:27,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:27,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 18:36:27,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:27,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 18:36:27,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-01-31 18:36:27,470 INFO L87 Difference]: Start difference. First operand 794 states and 1386 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:36:28,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:28,864 INFO L93 Difference]: Finished difference Result 1663 states and 2885 transitions. [2022-01-31 18:36:28,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 18:36:28,865 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 95 [2022-01-31 18:36:28,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:28,875 INFO L225 Difference]: With dead ends: 1663 [2022-01-31 18:36:28,875 INFO L226 Difference]: Without dead ends: 1048 [2022-01-31 18:36:28,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=351, Invalid=2841, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 18:36:28,890 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 102 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1368 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:28,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 104 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1368 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:36:28,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2022-01-31 18:36:29,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 1036. [2022-01-31 18:36:29,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 951 states have (on average 1.2618296529968454) internal successors, (1200), 971 states have internal predecessors, (1200), 57 states have call successors, (57), 10 states have call predecessors, (57), 27 states have return successors, (503), 54 states have call predecessors, (503), 56 states have call successors, (503) [2022-01-31 18:36:29,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 1760 transitions. [2022-01-31 18:36:29,134 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 1760 transitions. Word has length 95 [2022-01-31 18:36:29,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:29,134 INFO L470 AbstractCegarLoop]: Abstraction has 1036 states and 1760 transitions. [2022-01-31 18:36:29,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:36:29,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 1760 transitions. [2022-01-31 18:36:29,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:36:29,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:29,149 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 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, 1] [2022-01-31 18:36:29,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 18:36:29,149 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:29,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:29,149 INFO L85 PathProgramCache]: Analyzing trace with hash 472754613, now seen corresponding path program 5 times [2022-01-31 18:36:29,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:29,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222292646] [2022-01-31 18:36:29,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:29,151 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:36:29,151 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:36:29,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:29,152 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:29,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:29,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:29,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:36:29,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:29,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:36:29,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:29,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 18:36:29,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 18:36:29,767 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:29,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222292646] [2022-01-31 18:36:29,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1222292646] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:29,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:29,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 18:36:29,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56217173] [2022-01-31 18:36:29,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:29,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 18:36:29,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:29,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 18:36:29,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-01-31 18:36:29,769 INFO L87 Difference]: Start difference. First operand 1036 states and 1760 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 25 states have internal predecessors, (65), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:36:31,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:31,080 INFO L93 Difference]: Finished difference Result 1930 states and 3489 transitions. [2022-01-31 18:36:31,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 18:36:31,081 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 25 states have internal predecessors, (65), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 95 [2022-01-31 18:36:31,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:31,105 INFO L225 Difference]: With dead ends: 1930 [2022-01-31 18:36:31,105 INFO L226 Difference]: Without dead ends: 1440 [2022-01-31 18:36:31,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=371, Invalid=2385, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 18:36:31,126 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 130 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:31,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 94 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:36:31,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2022-01-31 18:36:31,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1428. [2022-01-31 18:36:31,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1303 states have (on average 1.237145049884881) internal successors, (1612), 1341 states have internal predecessors, (1612), 81 states have call successors, (81), 10 states have call predecessors, (81), 43 states have return successors, (867), 76 states have call predecessors, (867), 80 states have call successors, (867) [2022-01-31 18:36:31,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 2560 transitions. [2022-01-31 18:36:31,501 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 2560 transitions. Word has length 95 [2022-01-31 18:36:31,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:31,502 INFO L470 AbstractCegarLoop]: Abstraction has 1428 states and 2560 transitions. [2022-01-31 18:36:31,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 25 states have internal predecessors, (65), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:36:31,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 2560 transitions. [2022-01-31 18:36:31,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:36:31,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:31,527 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 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, 1] [2022-01-31 18:36:31,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 18:36:31,528 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:31,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:31,528 INFO L85 PathProgramCache]: Analyzing trace with hash -431027471, now seen corresponding path program 6 times [2022-01-31 18:36:31,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:31,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558415845] [2022-01-31 18:36:31,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:31,529 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:36:31,529 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:36:31,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:31,530 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:31,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:31,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:31,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:36:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:31,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:36:31,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:32,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 18:36:32,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:32,067 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 18:36:32,067 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:32,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558415845] [2022-01-31 18:36:32,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1558415845] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:32,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:32,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 18:36:32,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88737793] [2022-01-31 18:36:32,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:32,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 18:36:32,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:32,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 18:36:32,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-01-31 18:36:32,070 INFO L87 Difference]: Start difference. First operand 1428 states and 2560 transitions. Second operand has 19 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:36:33,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:33,102 INFO L93 Difference]: Finished difference Result 2267 states and 4062 transitions. [2022-01-31 18:36:33,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 18:36:33,103 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 95 [2022-01-31 18:36:33,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:33,121 INFO L225 Difference]: With dead ends: 2267 [2022-01-31 18:36:33,121 INFO L226 Difference]: Without dead ends: 1496 [2022-01-31 18:36:33,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=180, Invalid=1152, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 18:36:33,145 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 72 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:33,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 80 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:36:33,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2022-01-31 18:36:33,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1380. [2022-01-31 18:36:33,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1247 states have (on average 1.2413793103448276) internal successors, (1548), 1283 states have internal predecessors, (1548), 89 states have call successors, (89), 10 states have call predecessors, (89), 43 states have return successors, (899), 86 states have call predecessors, (899), 88 states have call successors, (899) [2022-01-31 18:36:33,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 2536 transitions. [2022-01-31 18:36:33,496 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 2536 transitions. Word has length 95 [2022-01-31 18:36:33,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:33,497 INFO L470 AbstractCegarLoop]: Abstraction has 1380 states and 2536 transitions. [2022-01-31 18:36:33,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:36:33,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 2536 transitions. [2022-01-31 18:36:33,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:36:33,523 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:33,524 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 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, 1] [2022-01-31 18:36:33,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 18:36:33,524 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:33,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:33,524 INFO L85 PathProgramCache]: Analyzing trace with hash -367343819, now seen corresponding path program 7 times [2022-01-31 18:36:33,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:33,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322421009] [2022-01-31 18:36:33,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:33,526 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:36:33,526 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:36:33,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:33,527 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:33,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:33,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:33,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:33,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:36:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:33,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:36:33,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:33,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 18:36:33,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:33,931 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 18:36:33,932 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:33,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322421009] [2022-01-31 18:36:33,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1322421009] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:33,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:33,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 18:36:33,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218398398] [2022-01-31 18:36:33,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:33,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 18:36:33,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:33,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 18:36:33,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-01-31 18:36:33,934 INFO L87 Difference]: Start difference. First operand 1380 states and 2536 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:36:35,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:35,031 INFO L93 Difference]: Finished difference Result 2257 states and 3781 transitions. [2022-01-31 18:36:35,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 18:36:35,032 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 95 [2022-01-31 18:36:35,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:35,052 INFO L225 Difference]: With dead ends: 2257 [2022-01-31 18:36:35,052 INFO L226 Difference]: Without dead ends: 1510 [2022-01-31 18:36:35,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=1395, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 18:36:35,075 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 80 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:35,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 106 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:36:35,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1510 states. [2022-01-31 18:36:35,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1510 to 1473. [2022-01-31 18:36:35,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1340 states have (on average 1.2358208955223882) internal successors, (1656), 1375 states have internal predecessors, (1656), 89 states have call successors, (89), 11 states have call predecessors, (89), 43 states have return successors, (757), 86 states have call predecessors, (757), 88 states have call successors, (757) [2022-01-31 18:36:35,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 2502 transitions. [2022-01-31 18:36:35,472 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 2502 transitions. Word has length 95 [2022-01-31 18:36:35,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:35,472 INFO L470 AbstractCegarLoop]: Abstraction has 1473 states and 2502 transitions. [2022-01-31 18:36:35,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:36:35,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 2502 transitions. [2022-01-31 18:36:35,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:36:35,487 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:35,487 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:36:35,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 18:36:35,487 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:35,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:35,487 INFO L85 PathProgramCache]: Analyzing trace with hash 56302903, now seen corresponding path program 8 times [2022-01-31 18:36:35,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:35,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175326315] [2022-01-31 18:36:35,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:35,489 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:36:35,489 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:36:35,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:35,490 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:35,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:35,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:35,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:36:35,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:35,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:36:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:36,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 18:36:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 18:36:36,148 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:36,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175326315] [2022-01-31 18:36:36,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1175326315] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:36,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:36,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 18:36:36,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709687254] [2022-01-31 18:36:36,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:36,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 18:36:36,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:36,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 18:36:36,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-01-31 18:36:36,149 INFO L87 Difference]: Start difference. First operand 1473 states and 2502 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 25 states have internal predecessors, (65), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:36:38,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:38,040 INFO L93 Difference]: Finished difference Result 1522 states and 2547 transitions. [2022-01-31 18:36:38,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 18:36:38,040 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 25 states have internal predecessors, (65), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 95 [2022-01-31 18:36:38,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:38,055 INFO L225 Difference]: With dead ends: 1522 [2022-01-31 18:36:38,055 INFO L226 Difference]: Without dead ends: 1518 [2022-01-31 18:36:38,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=371, Invalid=3919, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 18:36:38,068 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 85 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 2072 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 2143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:38,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 135 Invalid, 2143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2072 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:36:38,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2022-01-31 18:36:38,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1473. [2022-01-31 18:36:38,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1340 states have (on average 1.2358208955223882) internal successors, (1656), 1375 states have internal predecessors, (1656), 89 states have call successors, (89), 11 states have call predecessors, (89), 43 states have return successors, (613), 86 states have call predecessors, (613), 88 states have call successors, (613) [2022-01-31 18:36:38,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 2358 transitions. [2022-01-31 18:36:38,444 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 2358 transitions. Word has length 95 [2022-01-31 18:36:38,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:38,445 INFO L470 AbstractCegarLoop]: Abstraction has 1473 states and 2358 transitions. [2022-01-31 18:36:38,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 25 states have internal predecessors, (65), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:36:38,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 2358 transitions. [2022-01-31 18:36:38,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:36:38,459 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:38,459 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 12, 5, 5, 4, 4, 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] [2022-01-31 18:36:38,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 18:36:38,459 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:38,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:38,460 INFO L85 PathProgramCache]: Analyzing trace with hash 314468341, now seen corresponding path program 9 times [2022-01-31 18:36:38,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:38,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467706316] [2022-01-31 18:36:38,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:38,462 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:36:38,462 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:36:38,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:38,463 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:38,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:38,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:38,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:38,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:36:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:38,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:36:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:38,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 18:36:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:38,824 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 18:36:38,824 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:38,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467706316] [2022-01-31 18:36:38,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1467706316] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:38,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:38,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 18:36:38,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562524397] [2022-01-31 18:36:38,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:38,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 18:36:38,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:38,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 18:36:38,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-01-31 18:36:38,826 INFO L87 Difference]: Start difference. First operand 1473 states and 2358 transitions. Second operand has 16 states, 15 states have (on average 2.6) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:36:39,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:39,908 INFO L93 Difference]: Finished difference Result 2005 states and 4295 transitions. [2022-01-31 18:36:39,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 18:36:39,908 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 95 [2022-01-31 18:36:39,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:39,939 INFO L225 Difference]: With dead ends: 2005 [2022-01-31 18:36:39,939 INFO L226 Difference]: Without dead ends: 2001 [2022-01-31 18:36:39,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2022-01-31 18:36:39,967 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 53 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:39,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 113 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:36:39,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2001 states. [2022-01-31 18:36:40,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2001 to 1755. [2022-01-31 18:36:40,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1595 states have (on average 1.2608150470219435) internal successors, (2011), 1641 states have internal predecessors, (2011), 107 states have call successors, (107), 11 states have call predecessors, (107), 52 states have return successors, (897), 102 states have call predecessors, (897), 106 states have call successors, (897) [2022-01-31 18:36:40,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 3015 transitions. [2022-01-31 18:36:40,548 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 3015 transitions. Word has length 95 [2022-01-31 18:36:40,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:40,549 INFO L470 AbstractCegarLoop]: Abstraction has 1755 states and 3015 transitions. [2022-01-31 18:36:40,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.6) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:36:40,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 3015 transitions. [2022-01-31 18:36:40,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:36:40,579 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:40,579 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 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, 1] [2022-01-31 18:36:40,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 18:36:40,580 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:40,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:40,580 INFO L85 PathProgramCache]: Analyzing trace with hash -681914639, now seen corresponding path program 10 times [2022-01-31 18:36:40,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:40,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946894232] [2022-01-31 18:36:40,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:40,581 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:36:40,581 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:36:40,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:40,582 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:40,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:40,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:40,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:40,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:36:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:40,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:36:40,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:40,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 18:36:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 18:36:40,995 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:40,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946894232] [2022-01-31 18:36:40,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [946894232] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:40,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:40,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 18:36:40,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435310580] [2022-01-31 18:36:40,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:40,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 18:36:40,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:40,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 18:36:40,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-01-31 18:36:40,998 INFO L87 Difference]: Start difference. First operand 1755 states and 3015 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:36:42,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:42,116 INFO L93 Difference]: Finished difference Result 2820 states and 4744 transitions. [2022-01-31 18:36:42,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 18:36:42,118 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 95 [2022-01-31 18:36:42,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:42,149 INFO L225 Difference]: With dead ends: 2820 [2022-01-31 18:36:42,149 INFO L226 Difference]: Without dead ends: 1759 [2022-01-31 18:36:42,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=1379, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 18:36:42,190 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 74 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:42,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 104 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:36:42,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2022-01-31 18:36:42,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1755. [2022-01-31 18:36:42,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1595 states have (on average 1.250783699059561) internal successors, (1995), 1641 states have internal predecessors, (1995), 107 states have call successors, (107), 11 states have call predecessors, (107), 52 states have return successors, (761), 102 states have call predecessors, (761), 106 states have call successors, (761) [2022-01-31 18:36:42,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 2863 transitions. [2022-01-31 18:36:42,747 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 2863 transitions. Word has length 95 [2022-01-31 18:36:42,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:42,748 INFO L470 AbstractCegarLoop]: Abstraction has 1755 states and 2863 transitions. [2022-01-31 18:36:42,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:36:42,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 2863 transitions. [2022-01-31 18:36:42,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:36:42,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:42,767 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:36:42,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 18:36:42,767 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:42,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:42,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1563664815, now seen corresponding path program 11 times [2022-01-31 18:36:42,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:42,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105408314] [2022-01-31 18:36:42,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:42,769 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:36:42,769 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:36:42,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:42,770 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:43,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:43,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:36:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:43,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:36:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:43,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 18:36:43,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:43,488 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 18:36:43,489 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:43,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105408314] [2022-01-31 18:36:43,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [105408314] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:43,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:43,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 18:36:43,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916055850] [2022-01-31 18:36:43,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:43,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 18:36:43,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:43,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 18:36:43,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-01-31 18:36:43,490 INFO L87 Difference]: Start difference. First operand 1755 states and 2863 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:36:45,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:45,181 INFO L93 Difference]: Finished difference Result 1868 states and 3247 transitions. [2022-01-31 18:36:45,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 18:36:45,181 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 95 [2022-01-31 18:36:45,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:45,207 INFO L225 Difference]: With dead ends: 1868 [2022-01-31 18:36:45,207 INFO L226 Difference]: Without dead ends: 1864 [2022-01-31 18:36:45,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=401, Invalid=3631, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 18:36:45,231 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 92 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 1492 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:45,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 118 Invalid, 1566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1492 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:36:45,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2022-01-31 18:36:45,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1851. [2022-01-31 18:36:45,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1851 states, 1667 states have (on average 1.254349130173965) internal successors, (2091), 1737 states have internal predecessors, (2091), 131 states have call successors, (131), 11 states have call predecessors, (131), 52 states have return successors, (877), 102 states have call predecessors, (877), 130 states have call successors, (877) [2022-01-31 18:36:45,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1851 states to 1851 states and 3099 transitions. [2022-01-31 18:36:45,770 INFO L78 Accepts]: Start accepts. Automaton has 1851 states and 3099 transitions. Word has length 95 [2022-01-31 18:36:45,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:45,771 INFO L470 AbstractCegarLoop]: Abstraction has 1851 states and 3099 transitions. [2022-01-31 18:36:45,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:36:45,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1851 states and 3099 transitions. [2022-01-31 18:36:45,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:36:45,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:45,792 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 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] [2022-01-31 18:36:45,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 18:36:45,792 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:45,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:45,793 INFO L85 PathProgramCache]: Analyzing trace with hash 548216691, now seen corresponding path program 12 times [2022-01-31 18:36:45,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:45,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264248047] [2022-01-31 18:36:45,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:45,794 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:36:45,794 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:36:45,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:45,795 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:45,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:45,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:45,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:36:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:45,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:36:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:46,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 18:36:46,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:46,094 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-31 18:36:46,094 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:46,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264248047] [2022-01-31 18:36:46,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [264248047] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:46,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:46,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 18:36:46,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096569471] [2022-01-31 18:36:46,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:46,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 18:36:46,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:46,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 18:36:46,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-01-31 18:36:46,097 INFO L87 Difference]: Start difference. First operand 1851 states and 3099 transitions. Second operand has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:36:47,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:47,290 INFO L93 Difference]: Finished difference Result 2307 states and 4755 transitions. [2022-01-31 18:36:47,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 18:36:47,291 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 95 [2022-01-31 18:36:47,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:47,336 INFO L225 Difference]: With dead ends: 2307 [2022-01-31 18:36:47,337 INFO L226 Difference]: Without dead ends: 2303 [2022-01-31 18:36:47,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-01-31 18:36:47,381 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 49 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:47,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 109 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:36:47,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2022-01-31 18:36:48,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 2060. [2022-01-31 18:36:48,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 1852 states have (on average 1.2651187904967602) internal successors, (2343), 1934 states have internal predecessors, (2343), 148 states have call successors, (148), 11 states have call predecessors, (148), 59 states have return successors, (1164), 114 states have call predecessors, (1164), 147 states have call successors, (1164) [2022-01-31 18:36:48,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 3655 transitions. [2022-01-31 18:36:48,055 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 3655 transitions. Word has length 95 [2022-01-31 18:36:48,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:48,056 INFO L470 AbstractCegarLoop]: Abstraction has 2060 states and 3655 transitions. [2022-01-31 18:36:48,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:36:48,056 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 3655 transitions. [2022-01-31 18:36:48,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:36:48,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:48,079 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 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, 1] [2022-01-31 18:36:48,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 18:36:48,079 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:48,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:48,079 INFO L85 PathProgramCache]: Analyzing trace with hash -442573387, now seen corresponding path program 13 times [2022-01-31 18:36:48,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:48,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122083023] [2022-01-31 18:36:48,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:48,080 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:36:48,080 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:36:48,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:48,081 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:48,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:48,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:48,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:48,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:36:48,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:48,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:36:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:48,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 18:36:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:48,485 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 18:36:48,485 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:48,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122083023] [2022-01-31 18:36:48,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [122083023] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:48,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:48,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 18:36:48,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300998059] [2022-01-31 18:36:48,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:48,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 18:36:48,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:48,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 18:36:48,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-01-31 18:36:48,486 INFO L87 Difference]: Start difference. First operand 2060 states and 3655 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:36:49,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:49,675 INFO L93 Difference]: Finished difference Result 3242 states and 5399 transitions. [2022-01-31 18:36:49,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 18:36:49,676 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 95 [2022-01-31 18:36:49,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:49,743 INFO L225 Difference]: With dead ends: 3242 [2022-01-31 18:36:49,743 INFO L226 Difference]: Without dead ends: 2064 [2022-01-31 18:36:49,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=1163, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 18:36:49,784 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 76 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:49,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 84 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:36:49,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2022-01-31 18:36:50,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 2060. [2022-01-31 18:36:50,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 1852 states have (on average 1.2564794816414686) internal successors, (2327), 1934 states have internal predecessors, (2327), 148 states have call successors, (148), 11 states have call predecessors, (148), 59 states have return successors, (1049), 114 states have call predecessors, (1049), 147 states have call successors, (1049) [2022-01-31 18:36:50,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 3524 transitions. [2022-01-31 18:36:50,432 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 3524 transitions. Word has length 95 [2022-01-31 18:36:50,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:50,433 INFO L470 AbstractCegarLoop]: Abstraction has 2060 states and 3524 transitions. [2022-01-31 18:36:50,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:36:50,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 3524 transitions. [2022-01-31 18:36:50,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:36:50,454 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:50,454 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:36:50,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 18:36:50,454 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:50,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:50,454 INFO L85 PathProgramCache]: Analyzing trace with hash -795661769, now seen corresponding path program 14 times [2022-01-31 18:36:50,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:50,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002341806] [2022-01-31 18:36:50,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:50,456 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:36:50,456 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:36:50,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:50,457 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:50,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:50,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:50,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:50,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:36:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:50,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:36:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:50,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 18:36:50,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:51,066 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 18:36:51,066 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:51,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002341806] [2022-01-31 18:36:51,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2002341806] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:51,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:51,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 18:36:51,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761564792] [2022-01-31 18:36:51,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:51,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 18:36:51,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:51,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 18:36:51,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-01-31 18:36:51,068 INFO L87 Difference]: Start difference. First operand 2060 states and 3524 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 25 states have internal predecessors, (68), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:36:52,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:52,696 INFO L93 Difference]: Finished difference Result 2076 states and 3536 transitions. [2022-01-31 18:36:52,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 18:36:52,696 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 25 states have internal predecessors, (68), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 95 [2022-01-31 18:36:52,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:52,719 INFO L225 Difference]: With dead ends: 2076 [2022-01-31 18:36:52,719 INFO L226 Difference]: Without dead ends: 2072 [2022-01-31 18:36:52,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=351, Invalid=2841, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 18:36:52,754 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 80 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:52,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 98 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1137 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:36:52,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2022-01-31 18:36:53,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 2054. [2022-01-31 18:36:53,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 1849 states have (on average 1.2568956192536507) internal successors, (2324), 1928 states have internal predecessors, (2324), 145 states have call successors, (145), 11 states have call predecessors, (145), 59 states have return successors, (807), 114 states have call predecessors, (807), 144 states have call successors, (807) [2022-01-31 18:36:53,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 3276 transitions. [2022-01-31 18:36:53,357 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 3276 transitions. Word has length 95 [2022-01-31 18:36:53,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:53,357 INFO L470 AbstractCegarLoop]: Abstraction has 2054 states and 3276 transitions. [2022-01-31 18:36:53,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 25 states have internal predecessors, (68), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:36:53,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 3276 transitions. [2022-01-31 18:36:53,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:36:53,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:53,434 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 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] [2022-01-31 18:36:53,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 18:36:53,434 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:53,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:53,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1738909171, now seen corresponding path program 15 times [2022-01-31 18:36:53,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:53,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128296956] [2022-01-31 18:36:53,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:53,435 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:36:53,435 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:36:53,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:53,436 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:53,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:53,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:53,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:36:53,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:53,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:36:53,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:53,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 18:36:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:53,733 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 18:36:53,733 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:53,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128296956] [2022-01-31 18:36:53,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [128296956] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:53,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:53,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 18:36:53,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771498848] [2022-01-31 18:36:53,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:53,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 18:36:53,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:53,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 18:36:53,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-01-31 18:36:53,734 INFO L87 Difference]: Start difference. First operand 2054 states and 3276 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:36:55,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:55,098 INFO L93 Difference]: Finished difference Result 2979 states and 5743 transitions. [2022-01-31 18:36:55,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 18:36:55,099 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 95 [2022-01-31 18:36:55,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:55,178 INFO L225 Difference]: With dead ends: 2979 [2022-01-31 18:36:55,178 INFO L226 Difference]: Without dead ends: 2975 [2022-01-31 18:36:55,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-01-31 18:36:55,260 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 60 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:55,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 104 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:36:55,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2975 states. [2022-01-31 18:36:56,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2975 to 2546. [2022-01-31 18:36:56,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2546 states, 2286 states have (on average 1.2755905511811023) internal successors, (2916), 2389 states have internal predecessors, (2916), 184 states have call successors, (184), 11 states have call predecessors, (184), 75 states have return successors, (1244), 145 states have call predecessors, (1244), 183 states have call successors, (1244) [2022-01-31 18:36:56,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 4344 transitions. [2022-01-31 18:36:56,262 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 4344 transitions. Word has length 95 [2022-01-31 18:36:56,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:56,262 INFO L470 AbstractCegarLoop]: Abstraction has 2546 states and 4344 transitions. [2022-01-31 18:36:56,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:36:56,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 4344 transitions. [2022-01-31 18:36:56,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:36:56,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:56,293 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 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] [2022-01-31 18:36:56,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 18:36:56,293 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:56,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:56,293 INFO L85 PathProgramCache]: Analyzing trace with hash 2003324725, now seen corresponding path program 16 times [2022-01-31 18:36:56,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:56,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211409789] [2022-01-31 18:36:56,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:56,294 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:36:56,294 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:36:56,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:56,295 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:56,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:56,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:36:56,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:56,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:36:56,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:56,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 18:36:56,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:56,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-31 18:36:56,575 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:56,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211409789] [2022-01-31 18:36:56,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1211409789] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:56,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:56,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 18:36:56,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819429848] [2022-01-31 18:36:56,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:56,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 18:36:56,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:56,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 18:36:56,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-01-31 18:36:56,576 INFO L87 Difference]: Start difference. First operand 2546 states and 4344 transitions. Second operand has 16 states, 15 states have (on average 2.6) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:36:58,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:58,319 INFO L93 Difference]: Finished difference Result 3730 states and 8247 transitions. [2022-01-31 18:36:58,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 18:36:58,320 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 95 [2022-01-31 18:36:58,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:58,510 INFO L225 Difference]: With dead ends: 3730 [2022-01-31 18:36:58,510 INFO L226 Difference]: Without dead ends: 3726 [2022-01-31 18:36:58,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2022-01-31 18:36:58,640 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 60 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1233 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:58,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 115 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1233 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:36:58,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3726 states. [2022-01-31 18:36:59,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3726 to 3168. [2022-01-31 18:36:59,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3168 states, 2843 states have (on average 1.2954625395708759) internal successors, (3683), 2975 states have internal predecessors, (3683), 231 states have call successors, (231), 11 states have call predecessors, (231), 93 states have return successors, (1894), 181 states have call predecessors, (1894), 230 states have call successors, (1894) [2022-01-31 18:36:59,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3168 states to 3168 states and 5808 transitions. [2022-01-31 18:36:59,987 INFO L78 Accepts]: Start accepts. Automaton has 3168 states and 5808 transitions. Word has length 95 [2022-01-31 18:36:59,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:59,987 INFO L470 AbstractCegarLoop]: Abstraction has 3168 states and 5808 transitions. [2022-01-31 18:36:59,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.6) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:36:59,987 INFO L276 IsEmpty]: Start isEmpty. Operand 3168 states and 5808 transitions. [2022-01-31 18:37:00,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:37:00,051 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:37:00,051 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 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, 1] [2022-01-31 18:37:00,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 18:37:00,051 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:37:00,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:37:00,052 INFO L85 PathProgramCache]: Analyzing trace with hash 126953585, now seen corresponding path program 17 times [2022-01-31 18:37:00,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:37:00,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809513699] [2022-01-31 18:37:00,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:37:00,053 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:37:00,053 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:37:00,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:37:00,055 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:37:00,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:00,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:37:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:00,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:37:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:00,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:37:00,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:00,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 18:37:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 18:37:00,457 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:37:00,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809513699] [2022-01-31 18:37:00,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1809513699] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:37:00,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:37:00,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 18:37:00,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001120801] [2022-01-31 18:37:00,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:37:00,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 18:37:00,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:37:00,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 18:37:00,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-01-31 18:37:00,458 INFO L87 Difference]: Start difference. First operand 3168 states and 5808 transitions. Second operand has 21 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:37:02,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:37:02,292 INFO L93 Difference]: Finished difference Result 4806 states and 8484 transitions. [2022-01-31 18:37:02,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 18:37:02,293 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 95 [2022-01-31 18:37:02,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:37:02,379 INFO L225 Difference]: With dead ends: 4806 [2022-01-31 18:37:02,379 INFO L226 Difference]: Without dead ends: 3080 [2022-01-31 18:37:02,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=209, Invalid=1351, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 18:37:02,560 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 77 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:37:02,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 65 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:37:02,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3080 states. [2022-01-31 18:37:03,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3080 to 3014. [2022-01-31 18:37:03,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3014 states, 2709 states have (on average 1.2956810631229236) internal successors, (3510), 2834 states have internal predecessors, (3510), 213 states have call successors, (213), 11 states have call predecessors, (213), 91 states have return successors, (1546), 168 states have call predecessors, (1546), 212 states have call successors, (1546) [2022-01-31 18:37:03,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3014 states to 3014 states and 5269 transitions. [2022-01-31 18:37:03,741 INFO L78 Accepts]: Start accepts. Automaton has 3014 states and 5269 transitions. Word has length 95 [2022-01-31 18:37:03,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:37:03,741 INFO L470 AbstractCegarLoop]: Abstraction has 3014 states and 5269 transitions. [2022-01-31 18:37:03,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:37:03,741 INFO L276 IsEmpty]: Start isEmpty. Operand 3014 states and 5269 transitions. [2022-01-31 18:37:03,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:37:03,794 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:37:03,794 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:37:03,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 18:37:03,794 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:37:03,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:37:03,795 INFO L85 PathProgramCache]: Analyzing trace with hash 570854259, now seen corresponding path program 18 times [2022-01-31 18:37:03,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:37:03,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629872520] [2022-01-31 18:37:03,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:37:03,796 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:37:03,796 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:37:03,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:37:03,797 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:37:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:04,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:37:04,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:04,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:37:04,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:04,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:37:04,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:04,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 18:37:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 18:37:04,420 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:37:04,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629872520] [2022-01-31 18:37:04,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1629872520] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:37:04,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:37:04,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 18:37:04,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496634046] [2022-01-31 18:37:04,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:37:04,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 18:37:04,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:37:04,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 18:37:04,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-01-31 18:37:04,422 INFO L87 Difference]: Start difference. First operand 3014 states and 5269 transitions. Second operand has 29 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:37:07,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:37:07,272 INFO L93 Difference]: Finished difference Result 3071 states and 5320 transitions. [2022-01-31 18:37:07,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 18:37:07,273 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 95 [2022-01-31 18:37:07,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:37:07,334 INFO L225 Difference]: With dead ends: 3071 [2022-01-31 18:37:07,334 INFO L226 Difference]: Without dead ends: 3067 [2022-01-31 18:37:07,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=442, Invalid=4814, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 18:37:07,580 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 104 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1975 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 2053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:37:07,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 105 Invalid, 2053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1975 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:37:07,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3067 states. [2022-01-31 18:37:08,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3067 to 3014. [2022-01-31 18:37:08,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3014 states, 2709 states have (on average 1.2956810631229236) internal successors, (3510), 2834 states have internal predecessors, (3510), 213 states have call successors, (213), 11 states have call predecessors, (213), 91 states have return successors, (1250), 168 states have call predecessors, (1250), 212 states have call successors, (1250) [2022-01-31 18:37:08,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3014 states to 3014 states and 4973 transitions. [2022-01-31 18:37:08,645 INFO L78 Accepts]: Start accepts. Automaton has 3014 states and 4973 transitions. Word has length 95 [2022-01-31 18:37:08,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:37:08,645 INFO L470 AbstractCegarLoop]: Abstraction has 3014 states and 4973 transitions. [2022-01-31 18:37:08,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:37:08,645 INFO L276 IsEmpty]: Start isEmpty. Operand 3014 states and 4973 transitions. [2022-01-31 18:37:08,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:37:08,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:37:08,692 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 12, 5, 5, 4, 4, 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] [2022-01-31 18:37:08,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 18:37:08,692 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:37:08,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:37:08,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1250912629, now seen corresponding path program 19 times [2022-01-31 18:37:08,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:37:08,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114748358] [2022-01-31 18:37:08,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:37:08,694 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:37:08,694 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:37:08,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:37:08,695 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:37:08,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:08,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:37:08,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:08,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:37:08,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:08,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:37:08,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:09,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 18:37:09,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 18:37:09,154 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:37:09,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114748358] [2022-01-31 18:37:09,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [114748358] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:37:09,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:37:09,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 18:37:09,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77543536] [2022-01-31 18:37:09,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:37:09,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 18:37:09,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:37:09,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 18:37:09,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2022-01-31 18:37:09,155 INFO L87 Difference]: Start difference. First operand 3014 states and 4973 transitions. Second operand has 17 states, 16 states have (on average 2.6875) internal successors, (43), 13 states have internal predecessors, (43), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:37:11,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:37:11,474 INFO L93 Difference]: Finished difference Result 4351 states and 9567 transitions. [2022-01-31 18:37:11,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 18:37:11,475 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 13 states have internal predecessors, (43), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 95 [2022-01-31 18:37:11,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:37:11,703 INFO L225 Difference]: With dead ends: 4351 [2022-01-31 18:37:11,703 INFO L226 Difference]: Without dead ends: 4347 [2022-01-31 18:37:11,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2022-01-31 18:37:11,923 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 64 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1548 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:37:11,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 127 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1548 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:37:11,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4347 states. [2022-01-31 18:37:13,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4347 to 3603. [2022-01-31 18:37:13,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3603 states, 3253 states have (on average 1.3227789732554565) internal successors, (4303), 3397 states have internal predecessors, (4303), 247 states have call successors, (247), 11 states have call predecessors, (247), 102 states have return successors, (1579), 194 states have call predecessors, (1579), 246 states have call successors, (1579) [2022-01-31 18:37:13,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3603 states to 3603 states and 6129 transitions. [2022-01-31 18:37:13,630 INFO L78 Accepts]: Start accepts. Automaton has 3603 states and 6129 transitions. Word has length 95 [2022-01-31 18:37:13,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:37:13,631 INFO L470 AbstractCegarLoop]: Abstraction has 3603 states and 6129 transitions. [2022-01-31 18:37:13,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 13 states have internal predecessors, (43), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:37:13,631 INFO L276 IsEmpty]: Start isEmpty. Operand 3603 states and 6129 transitions. [2022-01-31 18:37:13,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:37:13,684 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:37:13,684 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 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] [2022-01-31 18:37:13,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 18:37:13,684 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:37:13,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:37:13,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1515328183, now seen corresponding path program 20 times [2022-01-31 18:37:13,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:37:13,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560650857] [2022-01-31 18:37:13,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:37:13,686 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:37:13,686 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:37:13,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:37:13,687 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:37:13,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:13,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:37:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:13,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:37:13,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:13,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:37:13,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:13,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 18:37:13,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:14,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 18:37:14,001 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:37:14,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560650857] [2022-01-31 18:37:14,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [560650857] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:37:14,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:37:14,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 18:37:14,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866843530] [2022-01-31 18:37:14,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:37:14,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 18:37:14,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:37:14,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 18:37:14,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-01-31 18:37:14,003 INFO L87 Difference]: Start difference. First operand 3603 states and 6129 transitions. Second operand has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 12 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:37:16,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:37:16,429 INFO L93 Difference]: Finished difference Result 4782 states and 10291 transitions. [2022-01-31 18:37:16,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 18:37:16,431 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 12 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 95 [2022-01-31 18:37:16,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:37:16,709 INFO L225 Difference]: With dead ends: 4782 [2022-01-31 18:37:16,710 INFO L226 Difference]: Without dead ends: 4778 [2022-01-31 18:37:17,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2022-01-31 18:37:17,043 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 60 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1127 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:37:17,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 111 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1127 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:37:17,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4778 states. [2022-01-31 18:37:18,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4778 to 3820. [2022-01-31 18:37:18,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3820 states, 3480 states have (on average 1.3517241379310345) internal successors, (4704), 3618 states have internal predecessors, (4704), 242 states have call successors, (242), 11 states have call predecessors, (242), 97 states have return successors, (1412), 190 states have call predecessors, (1412), 241 states have call successors, (1412) [2022-01-31 18:37:18,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3820 states to 3820 states and 6358 transitions. [2022-01-31 18:37:18,956 INFO L78 Accepts]: Start accepts. Automaton has 3820 states and 6358 transitions. Word has length 95 [2022-01-31 18:37:18,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:37:18,956 INFO L470 AbstractCegarLoop]: Abstraction has 3820 states and 6358 transitions. [2022-01-31 18:37:18,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 12 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:37:18,956 INFO L276 IsEmpty]: Start isEmpty. Operand 3820 states and 6358 transitions. [2022-01-31 18:37:19,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:37:19,012 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:37:19,012 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 12, 5, 5, 4, 4, 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] [2022-01-31 18:37:19,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 18:37:19,013 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:37:19,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:37:19,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1090782729, now seen corresponding path program 21 times [2022-01-31 18:37:19,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:37:19,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799555697] [2022-01-31 18:37:19,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:37:19,014 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:37:19,014 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:37:19,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:37:19,020 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:37:19,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:19,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:37:19,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:19,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:37:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:19,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:37:19,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:19,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 18:37:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:19,339 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-31 18:37:19,339 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:37:19,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799555697] [2022-01-31 18:37:19,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [799555697] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:37:19,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:37:19,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 18:37:19,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662724462] [2022-01-31 18:37:19,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:37:19,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 18:37:19,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:37:19,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 18:37:19,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-01-31 18:37:19,340 INFO L87 Difference]: Start difference. First operand 3820 states and 6358 transitions. Second operand has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:37:22,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:37:22,060 INFO L93 Difference]: Finished difference Result 5345 states and 10708 transitions. [2022-01-31 18:37:22,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 18:37:22,060 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 95 [2022-01-31 18:37:22,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:37:22,427 INFO L225 Difference]: With dead ends: 5345 [2022-01-31 18:37:22,428 INFO L226 Difference]: Without dead ends: 5341 [2022-01-31 18:37:22,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-01-31 18:37:22,785 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 52 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1146 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:37:22,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 113 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1146 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:37:22,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5341 states. [2022-01-31 18:37:25,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5341 to 4638. [2022-01-31 18:37:25,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4638 states, 4240 states have (on average 1.3740566037735849) internal successors, (5826), 4404 states have internal predecessors, (5826), 282 states have call successors, (282), 11 states have call predecessors, (282), 115 states have return successors, (1913), 222 states have call predecessors, (1913), 281 states have call successors, (1913) [2022-01-31 18:37:25,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4638 states to 4638 states and 8021 transitions. [2022-01-31 18:37:25,232 INFO L78 Accepts]: Start accepts. Automaton has 4638 states and 8021 transitions. Word has length 95 [2022-01-31 18:37:25,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:37:25,232 INFO L470 AbstractCegarLoop]: Abstraction has 4638 states and 8021 transitions. [2022-01-31 18:37:25,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:37:25,232 INFO L276 IsEmpty]: Start isEmpty. Operand 4638 states and 8021 transitions. [2022-01-31 18:37:25,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:37:25,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:37:25,312 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 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, 1] [2022-01-31 18:37:25,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 18:37:25,312 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:37:25,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:37:25,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1784157237, now seen corresponding path program 22 times [2022-01-31 18:37:25,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:37:25,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156532721] [2022-01-31 18:37:25,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:37:25,314 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:37:25,314 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:37:25,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:37:25,315 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:37:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:25,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:37:25,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:25,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:37:25,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:25,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:37:25,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:25,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 18:37:25,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 18:37:25,679 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:37:25,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156532721] [2022-01-31 18:37:25,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [156532721] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:37:25,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:37:25,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 18:37:25,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793889317] [2022-01-31 18:37:25,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:37:25,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 18:37:25,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:37:25,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 18:37:25,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-01-31 18:37:25,680 INFO L87 Difference]: Start difference. First operand 4638 states and 8021 transitions. Second operand has 19 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:37:28,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:37:28,140 INFO L93 Difference]: Finished difference Result 7568 states and 12549 transitions. [2022-01-31 18:37:28,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 18:37:28,140 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 95 [2022-01-31 18:37:28,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:37:28,385 INFO L225 Difference]: With dead ends: 7568 [2022-01-31 18:37:28,385 INFO L226 Difference]: Without dead ends: 4642 [2022-01-31 18:37:28,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=1151, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 18:37:28,728 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 63 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:37:28,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 91 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:37:28,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4642 states. [2022-01-31 18:37:30,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4642 to 4638. [2022-01-31 18:37:30,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4638 states, 4240 states have (on average 1.3740566037735849) internal successors, (5826), 4404 states have internal predecessors, (5826), 282 states have call successors, (282), 11 states have call predecessors, (282), 115 states have return successors, (1716), 222 states have call predecessors, (1716), 281 states have call successors, (1716) [2022-01-31 18:37:31,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4638 states to 4638 states and 7824 transitions. [2022-01-31 18:37:31,044 INFO L78 Accepts]: Start accepts. Automaton has 4638 states and 7824 transitions. Word has length 95 [2022-01-31 18:37:31,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:37:31,044 INFO L470 AbstractCegarLoop]: Abstraction has 4638 states and 7824 transitions. [2022-01-31 18:37:31,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:37:31,044 INFO L276 IsEmpty]: Start isEmpty. Operand 4638 states and 7824 transitions. [2022-01-31 18:37:31,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:37:31,132 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:37:31,132 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:37:31,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 18:37:31,133 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:37:31,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:37:31,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1303076979, now seen corresponding path program 23 times [2022-01-31 18:37:31,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:37:31,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161119158] [2022-01-31 18:37:31,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:37:31,134 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:37:31,134 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:37:31,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:37:31,135 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:37:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:31,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:37:31,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:31,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:37:31,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:31,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:37:31,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:31,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 18:37:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:31,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 18:37:31,601 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:37:31,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161119158] [2022-01-31 18:37:31,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [161119158] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:37:31,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:37:31,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 18:37:31,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844278877] [2022-01-31 18:37:31,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:37:31,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 18:37:31,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:37:31,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 18:37:31,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-01-31 18:37:31,602 INFO L87 Difference]: Start difference. First operand 4638 states and 7824 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:37:34,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:37:34,942 INFO L93 Difference]: Finished difference Result 6167 states and 10154 transitions. [2022-01-31 18:37:34,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 18:37:34,942 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 95 [2022-01-31 18:37:34,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:37:35,073 INFO L225 Difference]: With dead ends: 6167 [2022-01-31 18:37:35,073 INFO L226 Difference]: Without dead ends: 4645 [2022-01-31 18:37:35,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=267, Invalid=1713, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 18:37:35,554 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 63 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:37:35,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 103 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:37:35,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4645 states. [2022-01-31 18:37:37,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4645 to 4561. [2022-01-31 18:37:37,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4561 states, 4179 states have (on average 1.377602297200287) internal successors, (5757), 4334 states have internal predecessors, (5757), 266 states have call successors, (266), 12 states have call predecessors, (266), 115 states have return successors, (1250), 214 states have call predecessors, (1250), 265 states have call successors, (1250) [2022-01-31 18:37:37,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4561 states to 4561 states and 7273 transitions. [2022-01-31 18:37:37,932 INFO L78 Accepts]: Start accepts. Automaton has 4561 states and 7273 transitions. Word has length 95 [2022-01-31 18:37:37,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:37:37,932 INFO L470 AbstractCegarLoop]: Abstraction has 4561 states and 7273 transitions. [2022-01-31 18:37:37,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:37:37,932 INFO L276 IsEmpty]: Start isEmpty. Operand 4561 states and 7273 transitions. [2022-01-31 18:37:38,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:37:38,004 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:37:38,004 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 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] [2022-01-31 18:37:38,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 18:37:38,004 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:37:38,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:37:38,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1114080457, now seen corresponding path program 24 times [2022-01-31 18:37:38,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:37:38,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283719212] [2022-01-31 18:37:38,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:37:38,006 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:37:38,006 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:37:38,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:37:38,007 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:37:38,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:38,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:37:38,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:38,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:37:38,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:38,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:37:38,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:38,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 18:37:38,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:38,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 18:37:38,322 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:37:38,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283719212] [2022-01-31 18:37:38,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1283719212] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:37:38,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:37:38,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 18:37:38,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131991507] [2022-01-31 18:37:38,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:37:38,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 18:37:38,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:37:38,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 18:37:38,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-01-31 18:37:38,323 INFO L87 Difference]: Start difference. First operand 4561 states and 7273 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:37:40,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:37:40,964 INFO L93 Difference]: Finished difference Result 5371 states and 9566 transitions. [2022-01-31 18:37:40,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 18:37:40,965 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 95 [2022-01-31 18:37:40,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:37:41,337 INFO L225 Difference]: With dead ends: 5371 [2022-01-31 18:37:41,337 INFO L226 Difference]: Without dead ends: 5367 [2022-01-31 18:37:41,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-31 18:37:41,595 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 55 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:37:41,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 101 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:37:41,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5367 states. [2022-01-31 18:37:44,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5367 to 4872. [2022-01-31 18:37:44,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4872 states, 4432 states have (on average 1.3621389891696751) internal successors, (6037), 4615 states have internal predecessors, (6037), 303 states have call successors, (303), 12 states have call predecessors, (303), 136 states have return successors, (1727), 244 states have call predecessors, (1727), 302 states have call successors, (1727) [2022-01-31 18:37:44,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4872 states to 4872 states and 8067 transitions. [2022-01-31 18:37:44,308 INFO L78 Accepts]: Start accepts. Automaton has 4872 states and 8067 transitions. Word has length 95 [2022-01-31 18:37:44,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:37:44,308 INFO L470 AbstractCegarLoop]: Abstraction has 4872 states and 8067 transitions. [2022-01-31 18:37:44,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:37:44,308 INFO L276 IsEmpty]: Start isEmpty. Operand 4872 states and 8067 transitions. [2022-01-31 18:37:44,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:37:44,385 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:37:44,385 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 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] [2022-01-31 18:37:44,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 18:37:44,386 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:37:44,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:37:44,386 INFO L85 PathProgramCache]: Analyzing trace with hash -880332107, now seen corresponding path program 25 times [2022-01-31 18:37:44,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:37:44,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466012507] [2022-01-31 18:37:44,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:37:44,389 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:37:44,389 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:37:44,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:37:44,390 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:37:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:44,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:37:44,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:44,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:37:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:44,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:37:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:44,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 18:37:44,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:44,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 18:37:44,702 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:37:44,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466012507] [2022-01-31 18:37:44,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1466012507] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:37:44,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:37:44,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 18:37:44,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881575255] [2022-01-31 18:37:44,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:37:44,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 18:37:44,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:37:44,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 18:37:44,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-01-31 18:37:44,703 INFO L87 Difference]: Start difference. First operand 4872 states and 8067 transitions. Second operand has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 12 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:37:47,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:37:47,842 INFO L93 Difference]: Finished difference Result 6117 states and 11816 transitions. [2022-01-31 18:37:47,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 18:37:47,843 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 12 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 95 [2022-01-31 18:37:47,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:37:48,511 INFO L225 Difference]: With dead ends: 6117 [2022-01-31 18:37:48,511 INFO L226 Difference]: Without dead ends: 6113 [2022-01-31 18:37:49,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2022-01-31 18:37:49,053 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 56 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1300 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:37:49,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 120 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1300 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:37:49,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6113 states. [2022-01-31 18:37:52,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6113 to 5403. [2022-01-31 18:37:52,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5403 states, 4866 states have (on average 1.339087546239211) internal successors, (6516), 5092 states have internal predecessors, (6516), 369 states have call successors, (369), 12 states have call predecessors, (369), 167 states have return successors, (2571), 298 states have call predecessors, (2571), 368 states have call successors, (2571) [2022-01-31 18:37:52,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5403 states to 5403 states and 9456 transitions. [2022-01-31 18:37:52,703 INFO L78 Accepts]: Start accepts. Automaton has 5403 states and 9456 transitions. Word has length 95 [2022-01-31 18:37:52,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:37:52,704 INFO L470 AbstractCegarLoop]: Abstraction has 5403 states and 9456 transitions. [2022-01-31 18:37:52,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 12 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:37:52,704 INFO L276 IsEmpty]: Start isEmpty. Operand 5403 states and 9456 transitions. [2022-01-31 18:37:52,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:37:52,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:37:52,798 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 12, 5, 5, 4, 4, 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] [2022-01-31 18:37:52,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 18:37:52,798 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:37:52,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:37:52,798 INFO L85 PathProgramCache]: Analyzing trace with hash -615916553, now seen corresponding path program 26 times [2022-01-31 18:37:52,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:37:52,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786907779] [2022-01-31 18:37:52,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:37:52,800 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:37:52,800 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:37:52,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:37:52,801 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:37:52,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:52,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:37:52,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:52,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:37:52,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:52,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:37:52,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:53,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 18:37:53,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 18:37:53,133 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:37:53,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786907779] [2022-01-31 18:37:53,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1786907779] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:37:53,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:37:53,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 18:37:53,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869609283] [2022-01-31 18:37:53,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:37:53,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 18:37:53,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:37:53,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 18:37:53,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-01-31 18:37:53,134 INFO L87 Difference]: Start difference. First operand 5403 states and 9456 transitions. Second operand has 16 states, 15 states have (on average 2.6) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:37:56,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:37:56,633 INFO L93 Difference]: Finished difference Result 6689 states and 13930 transitions. [2022-01-31 18:37:56,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 18:37:56,633 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 95 [2022-01-31 18:37:56,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:37:57,098 INFO L225 Difference]: With dead ends: 6689 [2022-01-31 18:37:57,098 INFO L226 Difference]: Without dead ends: 6685 [2022-01-31 18:37:57,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-01-31 18:37:57,692 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 58 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1449 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:37:57,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 124 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1449 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:37:57,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6685 states. [2022-01-31 18:38:01,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6685 to 5764. [2022-01-31 18:38:01,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5764 states, 5223 states have (on average 1.359754930116791) internal successors, (7102), 5451 states have internal predecessors, (7102), 372 states have call successors, (372), 12 states have call predecessors, (372), 168 states have return successors, (2584), 300 states have call predecessors, (2584), 371 states have call successors, (2584) [2022-01-31 18:38:01,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5764 states to 5764 states and 10058 transitions. [2022-01-31 18:38:01,918 INFO L78 Accepts]: Start accepts. Automaton has 5764 states and 10058 transitions. Word has length 95 [2022-01-31 18:38:01,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:38:01,918 INFO L470 AbstractCegarLoop]: Abstraction has 5764 states and 10058 transitions. [2022-01-31 18:38:01,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.6) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:38:01,918 INFO L276 IsEmpty]: Start isEmpty. Operand 5764 states and 10058 transitions. [2022-01-31 18:38:02,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:38:02,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:38:02,014 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 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] [2022-01-31 18:38:02,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 18:38:02,015 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:38:02,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:38:02,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1368328649, now seen corresponding path program 27 times [2022-01-31 18:38:02,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:38:02,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183440898] [2022-01-31 18:38:02,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:38:02,016 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:38:02,016 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:38:02,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:38:02,017 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:38:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:38:02,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:38:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:38:02,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:38:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:38:02,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:38:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:38:02,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 18:38:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:38:02,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 18:38:02,323 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:38:02,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183440898] [2022-01-31 18:38:02,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1183440898] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:38:02,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:38:02,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 18:38:02,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918152982] [2022-01-31 18:38:02,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:38:02,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 18:38:02,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:38:02,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 18:38:02,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-01-31 18:38:02,324 INFO L87 Difference]: Start difference. First operand 5764 states and 10058 transitions. Second operand has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 12 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:38:05,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:38:05,982 INFO L93 Difference]: Finished difference Result 6937 states and 14352 transitions. [2022-01-31 18:38:05,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 18:38:05,983 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 12 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 95 [2022-01-31 18:38:05,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:38:06,554 INFO L225 Difference]: With dead ends: 6937 [2022-01-31 18:38:06,554 INFO L226 Difference]: Without dead ends: 6933 [2022-01-31 18:38:07,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2022-01-31 18:38:07,299 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 66 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:38:07,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 105 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:38:07,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6933 states. [2022-01-31 18:38:11,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6933 to 6022. [2022-01-31 18:38:11,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6022 states, 5435 states have (on average 1.349770009199632) internal successors, (7336), 5681 states have internal predecessors, (7336), 408 states have call successors, (408), 12 states have call predecessors, (408), 178 states have return successors, (2961), 328 states have call predecessors, (2961), 407 states have call successors, (2961) [2022-01-31 18:38:11,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6022 states to 6022 states and 10705 transitions. [2022-01-31 18:38:11,744 INFO L78 Accepts]: Start accepts. Automaton has 6022 states and 10705 transitions. Word has length 95 [2022-01-31 18:38:11,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:38:11,744 INFO L470 AbstractCegarLoop]: Abstraction has 6022 states and 10705 transitions. [2022-01-31 18:38:11,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 12 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:38:11,744 INFO L276 IsEmpty]: Start isEmpty. Operand 6022 states and 10705 transitions. [2022-01-31 18:38:11,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:38:11,903 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:38:11,904 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 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] [2022-01-31 18:38:11,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 18:38:11,904 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:38:11,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:38:11,904 INFO L85 PathProgramCache]: Analyzing trace with hash 584943289, now seen corresponding path program 1 times [2022-01-31 18:38:11,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:38:11,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545379255] [2022-01-31 18:38:11,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:38:11,905 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:38:11,905 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:38:11,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:38:11,906 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:38:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:38:12,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:38:12,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:38:12,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:38:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:38:12,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:38:12,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:38:12,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 18:38:12,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:38:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-31 18:38:12,239 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:38:12,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545379255] [2022-01-31 18:38:12,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [545379255] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:38:12,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:38:12,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 18:38:12,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135640856] [2022-01-31 18:38:12,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:38:12,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 18:38:12,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:38:12,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 18:38:12,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-01-31 18:38:12,241 INFO L87 Difference]: Start difference. First operand 6022 states and 10705 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:38:15,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:38:15,898 INFO L93 Difference]: Finished difference Result 6994 states and 13531 transitions. [2022-01-31 18:38:15,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 18:38:15,898 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 95 [2022-01-31 18:38:15,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:38:16,228 INFO L225 Difference]: With dead ends: 6994 [2022-01-31 18:38:16,228 INFO L226 Difference]: Without dead ends: 6990 [2022-01-31 18:38:16,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-01-31 18:38:16,788 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 56 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:38:16,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 125 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1464 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:38:16,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6990 states. [2022-01-31 18:38:20,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6990 to 6560. [2022-01-31 18:38:20,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6560 states, 5947 states have (on average 1.3662350765091642) internal successors, (8125), 6205 states have internal predecessors, (8125), 425 states have call successors, (425), 12 states have call predecessors, (425), 187 states have return successors, (3173), 342 states have call predecessors, (3173), 424 states have call successors, (3173) [2022-01-31 18:38:20,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6560 states to 6560 states and 11723 transitions. [2022-01-31 18:38:20,812 INFO L78 Accepts]: Start accepts. Automaton has 6560 states and 11723 transitions. Word has length 95 [2022-01-31 18:38:20,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:38:20,812 INFO L470 AbstractCegarLoop]: Abstraction has 6560 states and 11723 transitions. [2022-01-31 18:38:20,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 18:38:20,812 INFO L276 IsEmpty]: Start isEmpty. Operand 6560 states and 11723 transitions. [2022-01-31 18:38:20,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 18:38:20,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:38:20,936 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 5, 5, 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] [2022-01-31 18:38:20,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 18:38:20,937 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:38:20,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:38:20,937 INFO L85 PathProgramCache]: Analyzing trace with hash -986442697, now seen corresponding path program 28 times [2022-01-31 18:38:20,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:38:20,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262700140] [2022-01-31 18:38:20,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:38:20,938 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:38:20,938 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:38:20,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:38:20,939 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:38:20,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:38:20,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:38:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:38:20,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:38:20,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:38:20,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:38:20,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:38:20,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-01-31 18:38:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:38:20,984 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 18:38:20,985 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:38:20,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262700140] [2022-01-31 18:38:20,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [262700140] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:38:20,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:38:20,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 18:38:20,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177137891] [2022-01-31 18:38:20,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:38:20,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 18:38:20,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:38:20,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 18:38:20,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-31 18:38:20,986 INFO L87 Difference]: Start difference. First operand 6560 states and 11723 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 18:38:23,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:38:23,705 INFO L93 Difference]: Finished difference Result 9990 states and 16845 transitions. [2022-01-31 18:38:23,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 18:38:23,706 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 97 [2022-01-31 18:38:23,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:38:23,843 INFO L225 Difference]: With dead ends: 9990 [2022-01-31 18:38:23,843 INFO L226 Difference]: Without dead ends: 6144 [2022-01-31 18:38:24,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-01-31 18:38:24,480 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 36 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:38:24,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 43 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 18:38:24,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6144 states. [2022-01-31 18:38:28,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6144 to 5880. [2022-01-31 18:38:28,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5880 states, 5393 states have (on average 1.3530502503244948) internal successors, (7297), 5569 states have internal predecessors, (7297), 299 states have call successors, (299), 12 states have call predecessors, (299), 187 states have return successors, (1973), 298 states have call predecessors, (1973), 298 states have call successors, (1973) [2022-01-31 18:38:28,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5880 states to 5880 states and 9569 transitions. [2022-01-31 18:38:28,377 INFO L78 Accepts]: Start accepts. Automaton has 5880 states and 9569 transitions. Word has length 97 [2022-01-31 18:38:28,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:38:28,378 INFO L470 AbstractCegarLoop]: Abstraction has 5880 states and 9569 transitions. [2022-01-31 18:38:28,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 18:38:28,378 INFO L276 IsEmpty]: Start isEmpty. Operand 5880 states and 9569 transitions. [2022-01-31 18:38:28,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 18:38:28,491 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:38:28,491 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 5, 5, 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] [2022-01-31 18:38:28,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 18:38:28,492 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:38:28,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:38:28,492 INFO L85 PathProgramCache]: Analyzing trace with hash 683889729, now seen corresponding path program 11 times [2022-01-31 18:38:28,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:38:28,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594781936] [2022-01-31 18:38:28,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:38:28,493 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:38:28,493 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:38:28,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:38:28,494 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:38:28,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:38:28,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:38:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:38:28,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:38:28,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:38:28,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 18:38:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:38:28,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 18:38:28,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:38:28,565 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 18:38:28,565 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:38:28,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594781936] [2022-01-31 18:38:28,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [594781936] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:38:28,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:38:28,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 18:38:28,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789650240] [2022-01-31 18:38:28,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:38:28,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 18:38:28,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:38:28,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 18:38:28,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 18:38:28,567 INFO L87 Difference]: Start difference. First operand 5880 states and 9569 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 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) [2022-01-31 18:38:29,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:38:29,362 INFO L93 Difference]: Finished difference Result 6944 states and 11064 transitions. [2022-01-31 18:38:29,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 18:38:29,363 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 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 98 [2022-01-31 18:38:29,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:38:29,611 INFO L225 Difference]: With dead ends: 6944 [2022-01-31 18:38:29,612 INFO L226 Difference]: Without dead ends: 0 [2022-01-31 18:38:30,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-01-31 18:38:30,202 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 28 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:38:30,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 43 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 18:38:30,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-31 18:38:30,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-31 18:38:30,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-31 18:38:30,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-31 18:38:30,211 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 98 [2022-01-31 18:38:30,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:38:30,211 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-31 18:38:30,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 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) [2022-01-31 18:38:30,211 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-31 18:38:30,212 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-31 18:38:30,228 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 18:38:30,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 18:38:30,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.