/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops/sum_array-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 02:45:58,843 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 02:45:58,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 02:45:58,863 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 02:45:58,881 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-24 02:45:58,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-24 02:45:58,882 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-24 02:45:58,882 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-24 02:45:58,883 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-24 02:45:58,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-24 02:45:58,884 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-24 02:45:58,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-24 02:45:58,886 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-24 02:45:58,890 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-24 02:45:58,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-24 02:45:58,894 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-24 02:45:58,898 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-24 02:45:58,903 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 02:45:58,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 02:45:58,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 02:45:58,909 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 02:45:58,920 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 02:45:58,920 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 02:45:58,922 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 02:45:58,922 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 02:45:58,922 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 02:45:58,922 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 02:45:58,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 02:45:58,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 02:45:58,922 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 02:45:58,922 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 02:45:58,923 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 02:45:58,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 02:45:58,923 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 02:45:58,923 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 02:45:58,923 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 02:45:58,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 02:45:58,923 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 02:45:58,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 02:45:58,924 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 02:45:58,924 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 02:45:58,924 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 02:45:59,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 02:45:59,155 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 02:45:59,157 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 02:45:59,158 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 02:45:59,163 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 02:45:59,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum_array-2.i [2022-02-24 02:45:59,241 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63c30ae98/be9f4a0badaf4d6296405b5621d81f2e/FLAGa7b8ab6b2 [2022-02-24 02:45:59,635 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 02:45:59,636 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum_array-2.i [2022-02-24 02:45:59,640 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63c30ae98/be9f4a0badaf4d6296405b5621d81f2e/FLAGa7b8ab6b2 [2022-02-24 02:45:59,662 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63c30ae98/be9f4a0badaf4d6296405b5621d81f2e [2022-02-24 02:45:59,664 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 02:45:59,665 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 02:45:59,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 02:45:59,680 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 02:45:59,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 02:45:59,690 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 02:45:59" (1/1) ... [2022-02-24 02:45:59,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f9dd828 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:59, skipping insertion in model container [2022-02-24 02:45:59,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 02:45:59" (1/1) ... [2022-02-24 02:45:59,698 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 02:45:59,716 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 02:45:59,953 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum_array-2.i[938,951] [2022-02-24 02:45:59,978 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 02:45:59,987 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 02:46:00,003 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum_array-2.i[938,951] [2022-02-24 02:46:00,027 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 02:46:00,043 INFO L208 MainTranslator]: Completed translation [2022-02-24 02:46:00,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:46:00 WrapperNode [2022-02-24 02:46:00,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 02:46:00,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 02:46:00,045 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 02:46:00,045 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 02:46:00,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:46:00" (1/1) ... [2022-02-24 02:46:00,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:46:00" (1/1) ... [2022-02-24 02:46:00,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:46:00" (1/1) ... [2022-02-24 02:46:00,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:46:00" (1/1) ... [2022-02-24 02:46:00,090 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:46:00" (1/1) ... [2022-02-24 02:46:00,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:46:00" (1/1) ... [2022-02-24 02:46:00,096 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:46:00" (1/1) ... [2022-02-24 02:46:00,098 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 02:46:00,099 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 02:46:00,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 02:46:00,099 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 02:46:00,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:46:00" (1/1) ... [2022-02-24 02:46:00,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 02:46:00,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 02:46:00,168 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-24 02:46:00,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-24 02:46:00,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 02:46:00,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 02:46:00,211 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 02:46:00,212 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-24 02:46:00,212 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 02:46:00,212 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 02:46:00,212 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 02:46:00,212 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 02:46:00,212 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-24 02:46:00,212 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-24 02:46:00,213 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 02:46:00,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 02:46:00,213 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-24 02:46:00,213 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 02:46:00,213 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 02:46:00,213 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-24 02:46:00,213 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 02:46:00,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-24 02:46:00,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 02:46:00,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 02:46:00,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 02:46:00,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 02:46:00,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 02:46:00,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 02:46:00,297 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 02:46:00,299 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 02:46:00,561 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 02:46:00,567 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 02:46:00,567 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-02-24 02:46:00,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 02:46:00 BoogieIcfgContainer [2022-02-24 02:46:00,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 02:46:00,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 02:46:00,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 02:46:00,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 02:46:00,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 02:45:59" (1/3) ... [2022-02-24 02:46:00,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d9ccfcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 02:46:00, skipping insertion in model container [2022-02-24 02:46:00,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:46:00" (2/3) ... [2022-02-24 02:46:00,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d9ccfcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 02:46:00, skipping insertion in model container [2022-02-24 02:46:00,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 02:46:00" (3/3) ... [2022-02-24 02:46:00,589 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_array-2.i [2022-02-24 02:46:00,593 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 02:46:00,594 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 02:46:00,660 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 02:46:00,670 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=QVASR [2022-02-24 02:46:00,670 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 02:46:00,687 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:46:00,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-24 02:46:00,699 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:00,699 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:00,700 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:00,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:00,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1611689087, now seen corresponding path program 1 times [2022-02-24 02:46:00,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:00,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266180613] [2022-02-24 02:46:00,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:00,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:00,791 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 02:46:00,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:00,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:00,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:00,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:00,935 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:00,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266180613] [2022-02-24 02:46:00,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1266180613] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:00,937 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:00,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-24 02:46:00,938 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002185096] [2022-02-24 02:46:00,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:00,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-24 02:46:00,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:00,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-24 02:46:00,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 02:46:00,970 INFO L87 Difference]: Start difference. First operand has 32 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:01,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:01,035 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2022-02-24 02:46:01,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-24 02:46:01,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-24 02:46:01,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:01,047 INFO L225 Difference]: With dead ends: 55 [2022-02-24 02:46:01,047 INFO L226 Difference]: Without dead ends: 27 [2022-02-24 02:46:01,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 02:46:01,053 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 28 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:01,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 02:46:01,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-24 02:46:01,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-02-24 02:46:01,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:01,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-02-24 02:46:01,104 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2022-02-24 02:46:01,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:01,105 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-02-24 02:46:01,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:01,106 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-02-24 02:46:01,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-24 02:46:01,107 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:01,107 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:01,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 02:46:01,108 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:01,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:01,110 INFO L85 PathProgramCache]: Analyzing trace with hash -717013641, now seen corresponding path program 1 times [2022-02-24 02:46:01,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:01,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406275276] [2022-02-24 02:46:01,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:01,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:01,117 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 02:46:01,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:01,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:01,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:01,259 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:01,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406275276] [2022-02-24 02:46:01,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1406275276] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:01,259 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:01,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 02:46:01,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223045747] [2022-02-24 02:46:01,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:01,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 02:46:01,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:01,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 02:46:01,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-24 02:46:01,261 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:01,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:01,378 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2022-02-24 02:46:01,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 02:46:01,378 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-24 02:46:01,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:01,380 INFO L225 Difference]: With dead ends: 62 [2022-02-24 02:46:01,380 INFO L226 Difference]: Without dead ends: 39 [2022-02-24 02:46:01,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-24 02:46:01,382 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 53 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:01,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 30 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:46:01,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-02-24 02:46:01,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2022-02-24 02:46:01,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:01,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-02-24 02:46:01,394 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 17 [2022-02-24 02:46:01,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:01,395 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-02-24 02:46:01,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:01,396 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-02-24 02:46:01,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 02:46:01,397 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:01,397 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:01,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 02:46:01,398 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:01,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:01,402 INFO L85 PathProgramCache]: Analyzing trace with hash -442514949, now seen corresponding path program 1 times [2022-02-24 02:46:01,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:01,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533487639] [2022-02-24 02:46:01,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:01,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:01,412 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:01,412 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:01,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:02,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:02,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:02,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:02,136 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:02,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533487639] [2022-02-24 02:46:02,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [533487639] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:02,137 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:02,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 02:46:02,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077752220] [2022-02-24 02:46:02,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:02,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 02:46:02,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:02,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 02:46:02,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-24 02:46:02,139 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:02,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:02,437 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2022-02-24 02:46:02,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 02:46:02,438 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-24 02:46:02,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:02,438 INFO L225 Difference]: With dead ends: 45 [2022-02-24 02:46:02,438 INFO L226 Difference]: Without dead ends: 43 [2022-02-24 02:46:02,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-02-24 02:46:02,440 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 58 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:02,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 54 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:46:02,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-24 02:46:02,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2022-02-24 02:46:02,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:46:02,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-02-24 02:46:02,456 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 25 [2022-02-24 02:46:02,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:02,457 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-02-24 02:46:02,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:02,457 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-02-24 02:46:02,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 02:46:02,458 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:02,459 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:02,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 02:46:02,459 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:02,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:02,460 INFO L85 PathProgramCache]: Analyzing trace with hash 321785045, now seen corresponding path program 1 times [2022-02-24 02:46:02,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:02,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089155743] [2022-02-24 02:46:02,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:02,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:02,466 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:02,466 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:02,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:02,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:02,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 02:46:02,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:02,702 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:02,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089155743] [2022-02-24 02:46:02,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2089155743] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:02,703 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:02,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 02:46:02,703 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835945316] [2022-02-24 02:46:02,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:02,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 02:46:02,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:02,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 02:46:02,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-24 02:46:02,735 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:02,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:02,987 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2022-02-24 02:46:02,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 02:46:02,988 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-02-24 02:46:02,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:02,990 INFO L225 Difference]: With dead ends: 94 [2022-02-24 02:46:02,990 INFO L226 Difference]: Without dead ends: 55 [2022-02-24 02:46:02,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:46:03,001 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 92 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:03,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 35 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:46:03,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-24 02:46:03,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2022-02-24 02:46:03,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:46:03,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2022-02-24 02:46:03,026 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 33 [2022-02-24 02:46:03,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:03,027 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2022-02-24 02:46:03,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:03,028 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2022-02-24 02:46:03,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 02:46:03,029 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:03,029 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:03,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 02:46:03,030 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:03,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:03,030 INFO L85 PathProgramCache]: Analyzing trace with hash 479826701, now seen corresponding path program 2 times [2022-02-24 02:46:03,030 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:03,030 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979510123] [2022-02-24 02:46:03,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:03,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:03,034 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:03,034 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:03,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:04,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:04,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 02:46:04,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:04,547 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:04,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979510123] [2022-02-24 02:46:04,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [979510123] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:04,547 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:04,547 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 02:46:04,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638158790] [2022-02-24 02:46:04,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:04,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 02:46:04,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:04,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 02:46:04,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:46:04,549 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 19 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 18 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:05,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:05,151 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2022-02-24 02:46:05,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 02:46:05,151 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 18 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-02-24 02:46:05,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:05,152 INFO L225 Difference]: With dead ends: 59 [2022-02-24 02:46:05,152 INFO L226 Difference]: Without dead ends: 57 [2022-02-24 02:46:05,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2022-02-24 02:46:05,171 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 127 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:05,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 69 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:46:05,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-24 02:46:05,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2022-02-24 02:46:05,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 02:46:05,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-02-24 02:46:05,184 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 41 [2022-02-24 02:46:05,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:05,184 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-02-24 02:46:05,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 18 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:05,185 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-02-24 02:46:05,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-24 02:46:05,186 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:05,186 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:05,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 02:46:05,186 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:05,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:05,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1936282649, now seen corresponding path program 3 times [2022-02-24 02:46:05,187 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:05,187 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39295308] [2022-02-24 02:46:05,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:05,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:05,189 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:05,189 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:05,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:05,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:05,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:05,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 02:46:05,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:05,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-24 02:46:05,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:05,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:05,308 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:05,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39295308] [2022-02-24 02:46:05,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [39295308] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:05,308 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:05,308 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 02:46:05,308 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217642656] [2022-02-24 02:46:05,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:05,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 02:46:05,308 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:05,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 02:46:05,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-24 02:46:05,309 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:46:05,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:05,664 INFO L93 Difference]: Finished difference Result 125 states and 140 transitions. [2022-02-24 02:46:05,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 02:46:05,664 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 49 [2022-02-24 02:46:05,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:05,665 INFO L225 Difference]: With dead ends: 125 [2022-02-24 02:46:05,665 INFO L226 Difference]: Without dead ends: 69 [2022-02-24 02:46:05,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-02-24 02:46:05,667 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 106 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:05,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 63 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:46:05,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-02-24 02:46:05,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2022-02-24 02:46:05,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 02:46:05,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2022-02-24 02:46:05,680 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 49 [2022-02-24 02:46:05,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:05,680 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2022-02-24 02:46:05,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:46:05,680 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2022-02-24 02:46:05,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-24 02:46:05,685 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:05,685 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:05,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 02:46:05,685 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:05,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:05,686 INFO L85 PathProgramCache]: Analyzing trace with hash 267696619, now seen corresponding path program 4 times [2022-02-24 02:46:05,686 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:05,686 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676726366] [2022-02-24 02:46:05,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:05,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:05,689 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:05,689 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:05,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:07,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:07,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:07,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-24 02:46:07,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:07,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-24 02:46:07,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:07,217 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:07,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676726366] [2022-02-24 02:46:07,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1676726366] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:07,218 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:07,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 02:46:07,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912344604] [2022-02-24 02:46:07,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:07,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 02:46:07,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:07,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 02:46:07,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-02-24 02:46:07,219 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:46:09,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:09,274 INFO L93 Difference]: Finished difference Result 108 states and 118 transitions. [2022-02-24 02:46:09,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 02:46:09,275 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 57 [2022-02-24 02:46:09,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:09,277 INFO L225 Difference]: With dead ends: 108 [2022-02-24 02:46:09,277 INFO L226 Difference]: Without dead ends: 106 [2022-02-24 02:46:09,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=321, Invalid=2331, Unknown=0, NotChecked=0, Total=2652 [2022-02-24 02:46:09,279 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 130 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:09,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 97 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 02:46:09,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-02-24 02:46:09,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 95. [2022-02-24 02:46:09,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 82 states have (on average 1.0853658536585367) internal successors, (89), 83 states have internal predecessors, (89), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-24 02:46:09,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2022-02-24 02:46:09,316 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 57 [2022-02-24 02:46:09,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:09,316 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2022-02-24 02:46:09,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:46:09,317 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2022-02-24 02:46:09,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 02:46:09,317 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:09,317 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:09,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 02:46:09,317 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:09,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:09,318 INFO L85 PathProgramCache]: Analyzing trace with hash -440357820, now seen corresponding path program 5 times [2022-02-24 02:46:09,318 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:09,318 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069380105] [2022-02-24 02:46:09,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:09,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:09,320 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:09,321 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:09,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:09,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:09,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-24 02:46:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:09,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-24 02:46:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:09,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:09,517 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:09,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069380105] [2022-02-24 02:46:09,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2069380105] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:09,517 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:09,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 02:46:09,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791717141] [2022-02-24 02:46:09,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:09,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 02:46:09,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:09,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 02:46:09,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-02-24 02:46:09,519 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:10,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:10,063 INFO L93 Difference]: Finished difference Result 180 states and 202 transitions. [2022-02-24 02:46:10,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 02:46:10,063 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2022-02-24 02:46:10,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:10,064 INFO L225 Difference]: With dead ends: 180 [2022-02-24 02:46:10,064 INFO L226 Difference]: Without dead ends: 134 [2022-02-24 02:46:10,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-02-24 02:46:10,067 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 126 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:10,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 74 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:46:10,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-24 02:46:10,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 106. [2022-02-24 02:46:10,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 93 states have (on average 1.086021505376344) internal successors, (101), 94 states have internal predecessors, (101), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-24 02:46:10,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2022-02-24 02:46:10,103 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 60 [2022-02-24 02:46:10,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:10,103 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2022-02-24 02:46:10,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:10,104 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2022-02-24 02:46:10,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-24 02:46:10,104 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:10,105 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:10,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 02:46:10,105 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:10,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:10,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1329326907, now seen corresponding path program 6 times [2022-02-24 02:46:10,106 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:10,106 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998113148] [2022-02-24 02:46:10,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:10,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:10,109 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:10,109 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:10,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:10,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:10,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-24 02:46:10,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:10,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-24 02:46:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:10,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-24 02:46:10,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:10,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:10,387 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:10,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998113148] [2022-02-24 02:46:10,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [998113148] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:10,388 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:10,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 02:46:10,388 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692290161] [2022-02-24 02:46:10,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:10,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 02:46:10,388 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:10,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 02:46:10,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-02-24 02:46:10,389 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 02:46:11,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:11,090 INFO L93 Difference]: Finished difference Result 162 states and 176 transitions. [2022-02-24 02:46:11,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 02:46:11,091 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 65 [2022-02-24 02:46:11,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:11,091 INFO L225 Difference]: With dead ends: 162 [2022-02-24 02:46:11,091 INFO L226 Difference]: Without dead ends: 81 [2022-02-24 02:46:11,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-02-24 02:46:11,093 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 153 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:11,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 72 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:46:11,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-02-24 02:46:11,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 66. [2022-02-24 02:46:11,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 states have internal predecessors, (61), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 02:46:11,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-02-24 02:46:11,107 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 65 [2022-02-24 02:46:11,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:11,108 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-02-24 02:46:11,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 02:46:11,108 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-02-24 02:46:11,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-24 02:46:11,108 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:11,108 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:11,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 02:46:11,109 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:11,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:11,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1036675235, now seen corresponding path program 7 times [2022-02-24 02:46:11,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:11,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097213385] [2022-02-24 02:46:11,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:11,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:11,111 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:11,112 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:11,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:11,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:11,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-24 02:46:11,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:11,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-24 02:46:11,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:11,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:11,971 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:11,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097213385] [2022-02-24 02:46:11,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2097213385] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:11,972 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:11,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 02:46:11,972 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959716497] [2022-02-24 02:46:11,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:11,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 02:46:11,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:11,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 02:46:11,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-02-24 02:46:11,974 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:46:13,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:13,111 INFO L93 Difference]: Finished difference Result 102 states and 111 transitions. [2022-02-24 02:46:13,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 02:46:13,111 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 65 [2022-02-24 02:46:13,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:13,112 INFO L225 Difference]: With dead ends: 102 [2022-02-24 02:46:13,112 INFO L226 Difference]: Without dead ends: 100 [2022-02-24 02:46:13,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=321, Invalid=1485, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 02:46:13,113 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 150 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:13,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 81 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:46:13,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-02-24 02:46:13,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 74. [2022-02-24 02:46:13,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 states have internal predecessors, (67), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 02:46:13,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2022-02-24 02:46:13,144 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 65 [2022-02-24 02:46:13,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:13,144 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2022-02-24 02:46:13,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:46:13,144 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2022-02-24 02:46:13,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:46:13,145 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:13,145 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:13,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 02:46:13,145 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:13,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:13,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1312525181, now seen corresponding path program 8 times [2022-02-24 02:46:13,145 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:13,145 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394371143] [2022-02-24 02:46:13,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:13,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:13,148 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:13,148 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:14,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:14,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-24 02:46:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:14,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-24 02:46:14,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:14,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-24 02:46:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:14,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:14,462 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:14,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394371143] [2022-02-24 02:46:14,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1394371143] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:14,462 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:14,462 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 02:46:14,462 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597929218] [2022-02-24 02:46:14,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:14,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 02:46:14,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:14,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 02:46:14,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-02-24 02:46:14,463 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 02:46:16,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:16,792 INFO L93 Difference]: Finished difference Result 147 states and 162 transitions. [2022-02-24 02:46:16,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 02:46:16,793 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 73 [2022-02-24 02:46:16,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:16,794 INFO L225 Difference]: With dead ends: 147 [2022-02-24 02:46:16,794 INFO L226 Difference]: Without dead ends: 145 [2022-02-24 02:46:16,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=487, Invalid=2935, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 02:46:16,795 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 169 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:16,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 107 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 02:46:16,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-02-24 02:46:16,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 124. [2022-02-24 02:46:16,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 107 states have (on average 1.0654205607476634) internal successors, (114), 108 states have internal predecessors, (114), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-24 02:46:16,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 135 transitions. [2022-02-24 02:46:16,833 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 135 transitions. Word has length 73 [2022-02-24 02:46:16,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:16,834 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 135 transitions. [2022-02-24 02:46:16,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 02:46:16,834 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 135 transitions. [2022-02-24 02:46:16,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 02:46:16,834 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:16,835 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:16,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 02:46:16,835 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:16,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:16,835 INFO L85 PathProgramCache]: Analyzing trace with hash -856577066, now seen corresponding path program 9 times [2022-02-24 02:46:16,835 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:16,835 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252152840] [2022-02-24 02:46:16,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:16,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:16,838 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:16,838 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:17,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:17,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-24 02:46:17,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:17,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-24 02:46:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:17,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-24 02:46:17,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:17,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:17,034 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:17,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252152840] [2022-02-24 02:46:17,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [252152840] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:17,034 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:17,034 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 02:46:17,034 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798505846] [2022-02-24 02:46:17,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:17,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 02:46:17,035 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:17,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 02:46:17,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:46:17,035 INFO L87 Difference]: Start difference. First operand 124 states and 135 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:17,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:17,837 INFO L93 Difference]: Finished difference Result 233 states and 260 transitions. [2022-02-24 02:46:17,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 02:46:17,838 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76 [2022-02-24 02:46:17,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:17,839 INFO L225 Difference]: With dead ends: 233 [2022-02-24 02:46:17,839 INFO L226 Difference]: Without dead ends: 169 [2022-02-24 02:46:17,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2022-02-24 02:46:17,842 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 131 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:17,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 91 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:46:17,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-02-24 02:46:17,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 135. [2022-02-24 02:46:17,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 118 states have (on average 1.0677966101694916) internal successors, (126), 119 states have internal predecessors, (126), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-24 02:46:17,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 147 transitions. [2022-02-24 02:46:17,902 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 147 transitions. Word has length 76 [2022-02-24 02:46:17,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:17,902 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 147 transitions. [2022-02-24 02:46:17,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:17,902 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 147 transitions. [2022-02-24 02:46:17,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-24 02:46:17,903 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:17,903 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:17,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 02:46:17,903 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:17,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:17,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1952987391, now seen corresponding path program 10 times [2022-02-24 02:46:17,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:17,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548693558] [2022-02-24 02:46:17,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:17,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:17,906 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:17,906 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:18,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:20,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:20,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-24 02:46:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:20,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-24 02:46:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:20,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-24 02:46:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:20,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:20,144 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:20,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548693558] [2022-02-24 02:46:20,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1548693558] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:20,144 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:20,144 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 02:46:20,144 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83363317] [2022-02-24 02:46:20,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:20,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 02:46:20,145 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:20,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 02:46:20,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-02-24 02:46:20,145 INFO L87 Difference]: Start difference. First operand 135 states and 147 transitions. Second operand has 32 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 02:46:23,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:23,583 INFO L93 Difference]: Finished difference Result 256 states and 283 transitions. [2022-02-24 02:46:23,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-24 02:46:23,584 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 81 [2022-02-24 02:46:23,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:23,586 INFO L225 Difference]: With dead ends: 256 [2022-02-24 02:46:23,586 INFO L226 Difference]: Without dead ends: 254 [2022-02-24 02:46:23,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1511 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=687, Invalid=4715, Unknown=0, NotChecked=0, Total=5402 [2022-02-24 02:46:23,587 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 243 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1792 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 2004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:23,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 124 Invalid, 2004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1792 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 02:46:23,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-24 02:46:23,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 182. [2022-02-24 02:46:23,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 161 states have (on average 1.0683229813664596) internal successors, (172), 163 states have internal predecessors, (172), 14 states have call successors, (14), 8 states have call predecessors, (14), 6 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-24 02:46:23,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 199 transitions. [2022-02-24 02:46:23,665 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 199 transitions. Word has length 81 [2022-02-24 02:46:23,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:23,665 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 199 transitions. [2022-02-24 02:46:23,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 02:46:23,665 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 199 transitions. [2022-02-24 02:46:23,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-02-24 02:46:23,666 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:23,666 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:23,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 02:46:23,666 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:23,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:23,666 INFO L85 PathProgramCache]: Analyzing trace with hash 234389082, now seen corresponding path program 11 times [2022-02-24 02:46:23,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:23,667 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543051432] [2022-02-24 02:46:23,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:23,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:23,669 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:23,669 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:23,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:23,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:23,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-24 02:46:23,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:23,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-24 02:46:23,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:23,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-02-24 02:46:23,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:23,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:23,978 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:23,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543051432] [2022-02-24 02:46:23,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [543051432] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:23,978 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:23,978 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 02:46:23,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821024686] [2022-02-24 02:46:23,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:23,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 02:46:23,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:23,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 02:46:23,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-02-24 02:46:23,979 INFO L87 Difference]: Start difference. First operand 182 states and 199 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:25,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:25,314 INFO L93 Difference]: Finished difference Result 368 states and 415 transitions. [2022-02-24 02:46:25,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 02:46:25,314 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 84 [2022-02-24 02:46:25,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:25,317 INFO L225 Difference]: With dead ends: 368 [2022-02-24 02:46:25,317 INFO L226 Difference]: Without dead ends: 287 [2022-02-24 02:46:25,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 02:46:25,318 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 196 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1403 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:25,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 106 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1403 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 02:46:25,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-02-24 02:46:25,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 199. [2022-02-24 02:46:25,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 178 states have (on average 1.0730337078651686) internal successors, (191), 180 states have internal predecessors, (191), 14 states have call successors, (14), 8 states have call predecessors, (14), 6 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-24 02:46:25,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 218 transitions. [2022-02-24 02:46:25,417 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 218 transitions. Word has length 84 [2022-02-24 02:46:25,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:25,417 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 218 transitions. [2022-02-24 02:46:25,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:25,418 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 218 transitions. [2022-02-24 02:46:25,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-24 02:46:25,418 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:25,418 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:25,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 02:46:25,419 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:25,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:25,419 INFO L85 PathProgramCache]: Analyzing trace with hash 88433457, now seen corresponding path program 12 times [2022-02-24 02:46:25,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:25,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922302240] [2022-02-24 02:46:25,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:25,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:25,421 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:25,421 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:25,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:25,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-24 02:46:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:25,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-24 02:46:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:25,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-24 02:46:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:25,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-24 02:46:25,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:25,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-24 02:46:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:25,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:25,684 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:25,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922302240] [2022-02-24 02:46:25,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [922302240] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:25,684 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:25,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 02:46:25,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402859173] [2022-02-24 02:46:25,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:25,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 02:46:25,685 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:25,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 02:46:25,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-02-24 02:46:25,685 INFO L87 Difference]: Start difference. First operand 199 states and 218 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:46:26,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:26,418 INFO L93 Difference]: Finished difference Result 278 states and 301 transitions. [2022-02-24 02:46:26,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 02:46:26,418 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 89 [2022-02-24 02:46:26,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:26,423 INFO L225 Difference]: With dead ends: 278 [2022-02-24 02:46:26,423 INFO L226 Difference]: Without dead ends: 164 [2022-02-24 02:46:26,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2022-02-24 02:46:26,426 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 283 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:26,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 82 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:46:26,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-24 02:46:26,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 144. [2022-02-24 02:46:26,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 128 states have (on average 1.0625) internal successors, (136), 129 states have internal predecessors, (136), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-24 02:46:26,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 155 transitions. [2022-02-24 02:46:26,503 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 155 transitions. Word has length 89 [2022-02-24 02:46:26,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:26,503 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 155 transitions. [2022-02-24 02:46:26,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:46:26,503 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 155 transitions. [2022-02-24 02:46:26,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-24 02:46:26,504 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:26,504 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:26,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 02:46:26,516 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:26,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:26,516 INFO L85 PathProgramCache]: Analyzing trace with hash 283880411, now seen corresponding path program 13 times [2022-02-24 02:46:26,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:26,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056857837] [2022-02-24 02:46:26,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:26,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:26,520 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:26,520 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:29,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:29,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-24 02:46:29,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:29,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-24 02:46:29,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:29,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-24 02:46:29,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:29,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-24 02:46:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:29,201 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:29,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056857837] [2022-02-24 02:46:29,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1056857837] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:29,201 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:29,202 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 02:46:29,202 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361472658] [2022-02-24 02:46:29,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:29,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 02:46:29,202 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:29,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 02:46:29,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2022-02-24 02:46:29,203 INFO L87 Difference]: Start difference. First operand 144 states and 155 transitions. Second operand has 31 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 02:46:32,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:32,802 INFO L93 Difference]: Finished difference Result 192 states and 209 transitions. [2022-02-24 02:46:32,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-24 02:46:32,802 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 89 [2022-02-24 02:46:32,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:32,804 INFO L225 Difference]: With dead ends: 192 [2022-02-24 02:46:32,804 INFO L226 Difference]: Without dead ends: 190 [2022-02-24 02:46:32,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=709, Invalid=4991, Unknown=0, NotChecked=0, Total=5700 [2022-02-24 02:46:32,807 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 241 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:32,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 96 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 02:46:32,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-02-24 02:46:32,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 156. [2022-02-24 02:46:32,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 137 states have (on average 1.0583941605839415) internal successors, (145), 138 states have internal predecessors, (145), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-24 02:46:32,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 168 transitions. [2022-02-24 02:46:32,905 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 168 transitions. Word has length 89 [2022-02-24 02:46:32,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:32,906 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 168 transitions. [2022-02-24 02:46:32,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 02:46:32,906 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 168 transitions. [2022-02-24 02:46:32,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-24 02:46:32,906 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:32,906 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:32,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 02:46:32,907 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:32,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:32,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1546174009, now seen corresponding path program 14 times [2022-02-24 02:46:32,907 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:32,907 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376916161] [2022-02-24 02:46:32,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:32,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:32,909 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:32,910 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:33,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:35,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:35,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:35,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-24 02:46:35,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:35,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-24 02:46:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:35,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-24 02:46:35,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:35,722 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:35,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376916161] [2022-02-24 02:46:35,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1376916161] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:35,723 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:35,723 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 02:46:35,723 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825257946] [2022-02-24 02:46:35,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:35,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 02:46:35,723 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:35,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 02:46:35,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2022-02-24 02:46:35,724 INFO L87 Difference]: Start difference. First operand 156 states and 168 transitions. Second operand has 31 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 02:46:39,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:39,115 INFO L93 Difference]: Finished difference Result 266 states and 293 transitions. [2022-02-24 02:46:39,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-24 02:46:39,116 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 89 [2022-02-24 02:46:39,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:39,117 INFO L225 Difference]: With dead ends: 266 [2022-02-24 02:46:39,117 INFO L226 Difference]: Without dead ends: 264 [2022-02-24 02:46:39,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1963 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=727, Invalid=5753, Unknown=0, NotChecked=0, Total=6480 [2022-02-24 02:46:39,119 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 217 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 1547 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:39,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 119 Invalid, 1732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1547 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 02:46:39,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-02-24 02:46:39,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 212. [2022-02-24 02:46:39,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 188 states have (on average 1.0585106382978724) internal successors, (199), 190 states have internal predecessors, (199), 16 states have call successors, (16), 9 states have call predecessors, (16), 7 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-24 02:46:39,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 230 transitions. [2022-02-24 02:46:39,248 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 230 transitions. Word has length 89 [2022-02-24 02:46:39,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:39,248 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 230 transitions. [2022-02-24 02:46:39,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 02:46:39,248 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 230 transitions. [2022-02-24 02:46:39,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-24 02:46:39,249 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:39,249 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:39,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 02:46:39,249 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:39,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:39,249 INFO L85 PathProgramCache]: Analyzing trace with hash -173208430, now seen corresponding path program 15 times [2022-02-24 02:46:39,249 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:39,250 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089433312] [2022-02-24 02:46:39,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:39,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:39,253 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:39,253 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:39,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:39,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:39,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-24 02:46:39,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:39,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-02-24 02:46:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:39,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-02-24 02:46:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:39,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:39,617 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:39,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089433312] [2022-02-24 02:46:39,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1089433312] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:39,617 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:39,617 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 02:46:39,617 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101464296] [2022-02-24 02:46:39,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:39,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 02:46:39,617 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:39,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 02:46:39,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-02-24 02:46:39,618 INFO L87 Difference]: Start difference. First operand 212 states and 230 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:41,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:41,037 INFO L93 Difference]: Finished difference Result 426 states and 477 transitions. [2022-02-24 02:46:41,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 02:46:41,038 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 92 [2022-02-24 02:46:41,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:41,039 INFO L225 Difference]: With dead ends: 426 [2022-02-24 02:46:41,039 INFO L226 Difference]: Without dead ends: 331 [2022-02-24 02:46:41,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=1437, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 02:46:41,040 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 193 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2050 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 2255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 2050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:41,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 123 Invalid, 2255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 2050 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 02:46:41,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-02-24 02:46:41,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 229. [2022-02-24 02:46:41,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 205 states have (on average 1.0634146341463415) internal successors, (218), 207 states have internal predecessors, (218), 16 states have call successors, (16), 9 states have call predecessors, (16), 7 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-24 02:46:41,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 249 transitions. [2022-02-24 02:46:41,170 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 249 transitions. Word has length 92 [2022-02-24 02:46:41,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:41,170 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 249 transitions. [2022-02-24 02:46:41,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:41,170 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 249 transitions. [2022-02-24 02:46:41,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-24 02:46:41,171 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:41,171 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:41,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 02:46:41,171 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:41,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:41,172 INFO L85 PathProgramCache]: Analyzing trace with hash -947000557, now seen corresponding path program 16 times [2022-02-24 02:46:41,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:41,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205901693] [2022-02-24 02:46:41,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:41,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:41,174 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:41,174 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:41,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:43,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:43,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-24 02:46:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:43,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-24 02:46:43,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:43,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-24 02:46:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:43,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-24 02:46:43,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:43,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:43,284 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:43,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205901693] [2022-02-24 02:46:43,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1205901693] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:43,284 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:43,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 02:46:43,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214363731] [2022-02-24 02:46:43,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:43,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 02:46:43,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:43,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 02:46:43,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2022-02-24 02:46:43,285 INFO L87 Difference]: Start difference. First operand 229 states and 249 transitions. Second operand has 32 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 02:46:46,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:46,564 INFO L93 Difference]: Finished difference Result 341 states and 371 transitions. [2022-02-24 02:46:46,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-24 02:46:46,565 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 97 [2022-02-24 02:46:46,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:46,598 INFO L225 Difference]: With dead ends: 341 [2022-02-24 02:46:46,598 INFO L226 Difference]: Without dead ends: 339 [2022-02-24 02:46:46,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 16 SyntacticMatches, 7 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2251 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=892, Invalid=6248, Unknown=0, NotChecked=0, Total=7140 [2022-02-24 02:46:46,600 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 280 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 1813 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 2082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:46,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 120 Invalid, 2082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1813 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 02:46:46,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-02-24 02:46:46,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 225. [2022-02-24 02:46:46,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 202 states have (on average 1.0643564356435644) internal successors, (215), 204 states have internal predecessors, (215), 15 states have call successors, (15), 9 states have call predecessors, (15), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-24 02:46:46,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 244 transitions. [2022-02-24 02:46:46,750 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 244 transitions. Word has length 97 [2022-02-24 02:46:46,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:46,750 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 244 transitions. [2022-02-24 02:46:46,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 02:46:46,750 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 244 transitions. [2022-02-24 02:46:46,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-24 02:46:46,751 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:46,751 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:46,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 02:46:46,752 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:46,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:46,752 INFO L85 PathProgramCache]: Analyzing trace with hash -776451267, now seen corresponding path program 17 times [2022-02-24 02:46:46,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:46,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86576774] [2022-02-24 02:46:46,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:46,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:46,755 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:46,755 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:47,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:49,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:49,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:49,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-24 02:46:49,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:49,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-24 02:46:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:49,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-24 02:46:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:49,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:49,329 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:49,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86576774] [2022-02-24 02:46:49,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [86576774] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:49,329 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:49,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 02:46:49,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645384700] [2022-02-24 02:46:49,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:49,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 02:46:49,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:49,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 02:46:49,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 02:46:49,330 INFO L87 Difference]: Start difference. First operand 225 states and 244 transitions. Second operand has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 02:46:54,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:54,976 INFO L93 Difference]: Finished difference Result 421 states and 464 transitions. [2022-02-24 02:46:54,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-24 02:46:54,976 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 97 [2022-02-24 02:46:54,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:54,989 INFO L225 Difference]: With dead ends: 421 [2022-02-24 02:46:54,989 INFO L226 Difference]: Without dead ends: 419 [2022-02-24 02:46:54,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2631 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1038, Invalid=7704, Unknown=0, NotChecked=0, Total=8742 [2022-02-24 02:46:54,993 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 292 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2557 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 2871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 2557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:54,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 125 Invalid, 2871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 2557 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-24 02:46:55,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-02-24 02:46:55,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 278. [2022-02-24 02:46:55,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 252 states have (on average 1.0634920634920635) internal successors, (268), 255 states have internal predecessors, (268), 18 states have call successors, (18), 9 states have call predecessors, (18), 7 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-24 02:46:55,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 303 transitions. [2022-02-24 02:46:55,232 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 303 transitions. Word has length 97 [2022-02-24 02:46:55,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:55,232 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 303 transitions. [2022-02-24 02:46:55,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 02:46:55,233 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 303 transitions. [2022-02-24 02:46:55,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-02-24 02:46:55,233 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:55,233 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:55,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 02:46:55,234 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:55,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:55,234 INFO L85 PathProgramCache]: Analyzing trace with hash 215560342, now seen corresponding path program 18 times [2022-02-24 02:46:55,234 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:55,234 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725909605] [2022-02-24 02:46:55,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:55,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:55,236 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:55,237 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:55,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:55,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:55,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-02-24 02:46:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:55,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-02-24 02:46:55,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:55,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-02-24 02:46:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:55,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:55,667 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:55,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725909605] [2022-02-24 02:46:55,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [725909605] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:55,668 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:55,668 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 02:46:55,668 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284201562] [2022-02-24 02:46:55,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:55,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 02:46:55,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:55,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 02:46:55,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-02-24 02:46:55,669 INFO L87 Difference]: Start difference. First operand 278 states and 303 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:57,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:57,556 INFO L93 Difference]: Finished difference Result 593 states and 668 transitions. [2022-02-24 02:46:57,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 02:46:57,557 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 100 [2022-02-24 02:46:57,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:57,559 INFO L225 Difference]: With dead ends: 593 [2022-02-24 02:46:57,559 INFO L226 Difference]: Without dead ends: 489 [2022-02-24 02:46:57,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=229, Invalid=1841, Unknown=0, NotChecked=0, Total=2070 [2022-02-24 02:46:57,560 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 261 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2352 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 2620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 2352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:57,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 128 Invalid, 2620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 2352 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 02:46:57,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-02-24 02:46:57,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 301. [2022-02-24 02:46:57,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 275 states have (on average 1.069090909090909) internal successors, (294), 278 states have internal predecessors, (294), 18 states have call successors, (18), 9 states have call predecessors, (18), 7 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-24 02:46:57,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 329 transitions. [2022-02-24 02:46:57,763 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 329 transitions. Word has length 100 [2022-02-24 02:46:57,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:57,763 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 329 transitions. [2022-02-24 02:46:57,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:57,763 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 329 transitions. [2022-02-24 02:46:57,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-24 02:46:57,764 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:57,764 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:57,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 02:46:57,765 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:57,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:57,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1108674447, now seen corresponding path program 19 times [2022-02-24 02:46:57,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:57,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958671553] [2022-02-24 02:46:57,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:57,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:57,767 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:57,767 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:57,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:57,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:57,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-24 02:46:57,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:57,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-24 02:46:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:57,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-24 02:46:57,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:57,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-24 02:46:57,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:57,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-24 02:46:57,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:57,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-02-24 02:46:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:57,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:57,988 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:57,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958671553] [2022-02-24 02:46:57,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1958671553] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:57,989 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:57,989 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 02:46:57,989 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421357485] [2022-02-24 02:46:57,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:57,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 02:46:57,989 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:57,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 02:46:57,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-02-24 02:46:57,990 INFO L87 Difference]: Start difference. First operand 301 states and 329 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-24 02:46:59,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:59,181 INFO L93 Difference]: Finished difference Result 428 states and 463 transitions. [2022-02-24 02:46:59,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 02:46:59,182 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 105 [2022-02-24 02:46:59,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:59,183 INFO L225 Difference]: With dead ends: 428 [2022-02-24 02:46:59,183 INFO L226 Difference]: Without dead ends: 289 [2022-02-24 02:46:59,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2022-02-24 02:46:59,184 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 352 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:59,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 96 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 02:46:59,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-02-24 02:46:59,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 235. [2022-02-24 02:46:59,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 214 states have (on average 1.060747663551402) internal successors, (227), 216 states have internal predecessors, (227), 14 states have call successors, (14), 8 states have call predecessors, (14), 6 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-24 02:46:59,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 254 transitions. [2022-02-24 02:46:59,323 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 254 transitions. Word has length 105 [2022-02-24 02:46:59,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:59,323 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 254 transitions. [2022-02-24 02:46:59,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-24 02:46:59,323 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 254 transitions. [2022-02-24 02:46:59,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-24 02:46:59,324 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:59,324 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:59,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 02:46:59,324 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:59,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:59,324 INFO L85 PathProgramCache]: Analyzing trace with hash 55418349, now seen corresponding path program 20 times [2022-02-24 02:46:59,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:59,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596371729] [2022-02-24 02:46:59,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:59,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:59,327 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:59,327 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:01,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:01,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-24 02:47:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:01,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-24 02:47:01,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:01,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-24 02:47:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:01,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-24 02:47:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:01,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-02-24 02:47:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:01,268 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:01,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596371729] [2022-02-24 02:47:01,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [596371729] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:01,269 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:01,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 02:47:01,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486645398] [2022-02-24 02:47:01,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:01,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 02:47:01,269 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:01,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 02:47:01,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1020, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 02:47:01,270 INFO L87 Difference]: Start difference. First operand 235 states and 254 transitions. Second operand has 34 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:47:05,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:05,171 INFO L93 Difference]: Finished difference Result 277 states and 298 transitions. [2022-02-24 02:47:05,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-24 02:47:05,172 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 105 [2022-02-24 02:47:05,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:05,173 INFO L225 Difference]: With dead ends: 277 [2022-02-24 02:47:05,173 INFO L226 Difference]: Without dead ends: 275 [2022-02-24 02:47:05,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=463, Invalid=4367, Unknown=0, NotChecked=0, Total=4830 [2022-02-24 02:47:05,174 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 214 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 2159 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 2159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:05,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 146 Invalid, 2343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 2159 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-24 02:47:05,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-02-24 02:47:05,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 247. [2022-02-24 02:47:05,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 223 states have (on average 1.0582959641255605) internal successors, (236), 225 states have internal predecessors, (236), 16 states have call successors, (16), 9 states have call predecessors, (16), 7 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-24 02:47:05,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 267 transitions. [2022-02-24 02:47:05,364 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 267 transitions. Word has length 105 [2022-02-24 02:47:05,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:05,365 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 267 transitions. [2022-02-24 02:47:05,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:47:05,365 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 267 transitions. [2022-02-24 02:47:05,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-24 02:47:05,366 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:05,366 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:05,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 02:47:05,366 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:05,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:05,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1079129111, now seen corresponding path program 21 times [2022-02-24 02:47:05,367 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:05,367 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758907674] [2022-02-24 02:47:05,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:05,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:05,369 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:05,369 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:07,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:07,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-24 02:47:07,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:07,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-24 02:47:07,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:07,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-24 02:47:07,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:07,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-02-24 02:47:07,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:07,396 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:07,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758907674] [2022-02-24 02:47:07,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1758907674] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:07,396 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:07,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 02:47:07,397 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521396379] [2022-02-24 02:47:07,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:07,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 02:47:07,397 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:07,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 02:47:07,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 02:47:07,398 INFO L87 Difference]: Start difference. First operand 247 states and 267 transitions. Second operand has 34 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 02:47:12,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:12,055 INFO L93 Difference]: Finished difference Result 355 states and 383 transitions. [2022-02-24 02:47:12,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-24 02:47:12,055 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 105 [2022-02-24 02:47:12,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:12,057 INFO L225 Difference]: With dead ends: 355 [2022-02-24 02:47:12,057 INFO L226 Difference]: Without dead ends: 353 [2022-02-24 02:47:12,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2161 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=913, Invalid=6569, Unknown=0, NotChecked=0, Total=7482 [2022-02-24 02:47:12,058 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 264 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 2558 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 2821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 2558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:12,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 99 Invalid, 2821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 2558 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-24 02:47:12,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-02-24 02:47:12,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 243. [2022-02-24 02:47:12,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 220 states have (on average 1.059090909090909) internal successors, (233), 222 states have internal predecessors, (233), 15 states have call successors, (15), 9 states have call predecessors, (15), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-24 02:47:12,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 262 transitions. [2022-02-24 02:47:12,283 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 262 transitions. Word has length 105 [2022-02-24 02:47:12,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:12,283 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 262 transitions. [2022-02-24 02:47:12,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 02:47:12,283 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 262 transitions. [2022-02-24 02:47:12,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-24 02:47:12,284 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:12,285 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:12,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 02:47:12,285 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:12,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:12,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1253776651, now seen corresponding path program 22 times [2022-02-24 02:47:12,285 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:12,285 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787396890] [2022-02-24 02:47:12,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:12,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:12,290 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:12,290 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:12,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:14,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:14,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-24 02:47:14,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:14,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-24 02:47:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:14,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-02-24 02:47:14,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:14,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:14,485 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:14,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787396890] [2022-02-24 02:47:14,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [787396890] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:14,486 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:14,486 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 02:47:14,486 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538130388] [2022-02-24 02:47:14,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:14,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 02:47:14,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:14,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 02:47:14,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2022-02-24 02:47:14,488 INFO L87 Difference]: Start difference. First operand 243 states and 262 transitions. Second operand has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 30 states have internal predecessors, (89), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 02:47:17,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:17,925 INFO L93 Difference]: Finished difference Result 438 states and 493 transitions. [2022-02-24 02:47:17,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-24 02:47:17,926 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 30 states have internal predecessors, (89), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 105 [2022-02-24 02:47:17,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:17,927 INFO L225 Difference]: With dead ends: 438 [2022-02-24 02:47:17,927 INFO L226 Difference]: Without dead ends: 436 [2022-02-24 02:47:17,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 20 SyntacticMatches, 9 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1684 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=811, Invalid=5195, Unknown=0, NotChecked=0, Total=6006 [2022-02-24 02:47:17,928 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 396 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 2068 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 2431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 2068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:17,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 120 Invalid, 2431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 2068 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 02:47:17,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-02-24 02:47:18,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 243. [2022-02-24 02:47:18,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 220 states have (on average 1.059090909090909) internal successors, (233), 222 states have internal predecessors, (233), 15 states have call successors, (15), 9 states have call predecessors, (15), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-24 02:47:18,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 262 transitions. [2022-02-24 02:47:18,115 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 262 transitions. Word has length 105 [2022-02-24 02:47:18,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:18,115 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 262 transitions. [2022-02-24 02:47:18,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 30 states have internal predecessors, (89), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 02:47:18,116 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 262 transitions. [2022-02-24 02:47:18,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-24 02:47:18,117 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:18,117 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:18,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 02:47:18,117 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:18,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:18,117 INFO L85 PathProgramCache]: Analyzing trace with hash -410921273, now seen corresponding path program 23 times [2022-02-24 02:47:18,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:18,118 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33813881] [2022-02-24 02:47:18,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:18,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:18,120 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:18,120 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:18,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:18,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:18,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:18,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-24 02:47:18,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:18,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-24 02:47:18,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:18,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-24 02:47:18,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:18,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-24 02:47:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:18,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-02-24 02:47:18,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:18,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-02-24 02:47:18,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:18,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:18,438 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:18,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33813881] [2022-02-24 02:47:18,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [33813881] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:18,438 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:18,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 02:47:18,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563744838] [2022-02-24 02:47:18,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:18,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 02:47:18,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:18,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 02:47:18,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:47:18,439 INFO L87 Difference]: Start difference. First operand 243 states and 262 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-24 02:47:19,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:19,898 INFO L93 Difference]: Finished difference Result 354 states and 381 transitions. [2022-02-24 02:47:19,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 02:47:19,899 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 113 [2022-02-24 02:47:19,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:19,900 INFO L225 Difference]: With dead ends: 354 [2022-02-24 02:47:19,900 INFO L226 Difference]: Without dead ends: 210 [2022-02-24 02:47:19,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=924, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 02:47:19,900 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 444 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:19,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 110 Invalid, 1540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 02:47:19,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-02-24 02:47:20,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 178. [2022-02-24 02:47:20,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 160 states have (on average 1.05) internal successors, (168), 161 states have internal predecessors, (168), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-24 02:47:20,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 189 transitions. [2022-02-24 02:47:20,023 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 189 transitions. Word has length 113 [2022-02-24 02:47:20,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:20,024 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 189 transitions. [2022-02-24 02:47:20,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-24 02:47:20,024 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 189 transitions. [2022-02-24 02:47:20,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-24 02:47:20,024 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:20,025 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:20,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 02:47:20,025 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:20,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:20,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1288348401, now seen corresponding path program 24 times [2022-02-24 02:47:20,025 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:20,025 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608294885] [2022-02-24 02:47:20,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:20,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:20,027 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:20,028 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:20,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:21,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:21,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:21,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-24 02:47:21,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:21,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-24 02:47:21,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:21,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-24 02:47:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:21,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-02-24 02:47:21,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:21,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-02-24 02:47:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:21,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:21,982 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:21,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608294885] [2022-02-24 02:47:21,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1608294885] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:21,982 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:21,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 02:47:21,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034149981] [2022-02-24 02:47:21,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:21,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 02:47:21,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:21,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 02:47:21,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 02:47:21,983 INFO L87 Difference]: Start difference. First operand 178 states and 189 transitions. Second operand has 33 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:47:26,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:26,272 INFO L93 Difference]: Finished difference Result 240 states and 257 transitions. [2022-02-24 02:47:26,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-24 02:47:26,272 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 113 [2022-02-24 02:47:26,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:26,273 INFO L225 Difference]: With dead ends: 240 [2022-02-24 02:47:26,273 INFO L226 Difference]: Without dead ends: 238 [2022-02-24 02:47:26,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2043 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=777, Invalid=6533, Unknown=0, NotChecked=0, Total=7310 [2022-02-24 02:47:26,274 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 207 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2319 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 2512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 2319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:26,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 124 Invalid, 2512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 2319 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 02:47:26,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-02-24 02:47:26,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 190. [2022-02-24 02:47:26,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 169 states have (on average 1.047337278106509) internal successors, (177), 170 states have internal predecessors, (177), 13 states have call successors, (13), 9 states have call predecessors, (13), 7 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-24 02:47:26,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 202 transitions. [2022-02-24 02:47:26,416 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 202 transitions. Word has length 113 [2022-02-24 02:47:26,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:26,416 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 202 transitions. [2022-02-24 02:47:26,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:47:26,417 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 202 transitions. [2022-02-24 02:47:26,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-24 02:47:26,417 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:26,417 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:26,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 02:47:26,418 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:26,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:26,418 INFO L85 PathProgramCache]: Analyzing trace with hash -964193329, now seen corresponding path program 25 times [2022-02-24 02:47:26,418 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:26,418 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395502023] [2022-02-24 02:47:26,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:26,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:26,420 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:26,420 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:26,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:29,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:29,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-24 02:47:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:29,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-24 02:47:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:29,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-02-24 02:47:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:29,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-02-24 02:47:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:29,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:29,675 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:29,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395502023] [2022-02-24 02:47:29,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [395502023] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:29,675 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:29,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-02-24 02:47:29,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369028813] [2022-02-24 02:47:29,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:29,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-24 02:47:29,676 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:29,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-24 02:47:29,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1336, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 02:47:29,677 INFO L87 Difference]: Start difference. First operand 190 states and 202 transitions. Second operand has 39 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 02:47:34,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:34,512 INFO L93 Difference]: Finished difference Result 322 states and 350 transitions. [2022-02-24 02:47:34,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-24 02:47:34,513 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 113 [2022-02-24 02:47:34,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:34,514 INFO L225 Difference]: With dead ends: 322 [2022-02-24 02:47:34,514 INFO L226 Difference]: Without dead ends: 320 [2022-02-24 02:47:34,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2456 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=834, Invalid=7356, Unknown=0, NotChecked=0, Total=8190 [2022-02-24 02:47:34,515 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 265 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2802 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 3057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 2802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:34,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 126 Invalid, 3057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 2802 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-24 02:47:34,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-02-24 02:47:34,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 256. [2022-02-24 02:47:34,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 230 states have (on average 1.0478260869565217) internal successors, (241), 232 states have internal predecessors, (241), 17 states have call successors, (17), 10 states have call predecessors, (17), 8 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-24 02:47:34,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 274 transitions. [2022-02-24 02:47:34,715 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 274 transitions. Word has length 113 [2022-02-24 02:47:34,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:34,715 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 274 transitions. [2022-02-24 02:47:34,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 02:47:34,716 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 274 transitions. [2022-02-24 02:47:34,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-02-24 02:47:34,716 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:34,716 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:34,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 02:47:34,717 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:34,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:34,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1068718296, now seen corresponding path program 26 times [2022-02-24 02:47:34,717 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:34,717 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364587630] [2022-02-24 02:47:34,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:34,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:34,719 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:34,719 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:34,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:35,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:35,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:35,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-02-24 02:47:35,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:35,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-02-24 02:47:35,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:35,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-24 02:47:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:35,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-02-24 02:47:35,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:35,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:35,142 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:35,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364587630] [2022-02-24 02:47:35,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [364587630] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:35,142 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:35,142 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 02:47:35,142 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482631949] [2022-02-24 02:47:35,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:35,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 02:47:35,143 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:35,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 02:47:35,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-02-24 02:47:35,143 INFO L87 Difference]: Start difference. First operand 256 states and 274 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:47:37,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:37,481 INFO L93 Difference]: Finished difference Result 510 states and 565 transitions. [2022-02-24 02:47:37,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 02:47:37,481 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 116 [2022-02-24 02:47:37,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:37,483 INFO L225 Difference]: With dead ends: 510 [2022-02-24 02:47:37,483 INFO L226 Difference]: Without dead ends: 403 [2022-02-24 02:47:37,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=255, Invalid=2295, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 02:47:37,485 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 265 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 3165 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 3454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 3165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:37,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 142 Invalid, 3454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 3165 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-24 02:47:37,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-02-24 02:47:37,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 273. [2022-02-24 02:47:37,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 247 states have (on average 1.0526315789473684) internal successors, (260), 249 states have internal predecessors, (260), 17 states have call successors, (17), 10 states have call predecessors, (17), 8 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-24 02:47:37,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 293 transitions. [2022-02-24 02:47:37,710 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 293 transitions. Word has length 116 [2022-02-24 02:47:37,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:37,710 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 293 transitions. [2022-02-24 02:47:37,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:47:37,710 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 293 transitions. [2022-02-24 02:47:37,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-24 02:47:37,712 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:37,712 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:37,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 02:47:37,712 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:37,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:37,712 INFO L85 PathProgramCache]: Analyzing trace with hash 188454859, now seen corresponding path program 27 times [2022-02-24 02:47:37,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:37,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671479833] [2022-02-24 02:47:37,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:37,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:37,715 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:37,715 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:37,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:40,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:40,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:40,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-24 02:47:40,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:40,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-24 02:47:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:40,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-24 02:47:40,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:40,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-02-24 02:47:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:40,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-02-24 02:47:40,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:40,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-02-24 02:47:40,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:40,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:40,367 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:40,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671479833] [2022-02-24 02:47:40,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [671479833] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:40,367 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:40,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-24 02:47:40,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253340307] [2022-02-24 02:47:40,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:40,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 02:47:40,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:40,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 02:47:40,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 02:47:40,368 INFO L87 Difference]: Start difference. First operand 273 states and 293 transitions. Second operand has 37 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-24 02:47:45,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:45,305 INFO L93 Difference]: Finished difference Result 319 states and 341 transitions. [2022-02-24 02:47:45,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-24 02:47:45,305 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 121 [2022-02-24 02:47:45,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:45,313 INFO L225 Difference]: With dead ends: 319 [2022-02-24 02:47:45,313 INFO L226 Difference]: Without dead ends: 317 [2022-02-24 02:47:45,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=570, Invalid=6236, Unknown=0, NotChecked=0, Total=6806 [2022-02-24 02:47:45,314 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 213 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 2432 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 2616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 2432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:45,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 137 Invalid, 2616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 2432 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-24 02:47:45,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-02-24 02:47:45,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 285. [2022-02-24 02:47:45,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 256 states have (on average 1.05078125) internal successors, (269), 258 states have internal predecessors, (269), 19 states have call successors, (19), 11 states have call predecessors, (19), 9 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-24 02:47:45,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 306 transitions. [2022-02-24 02:47:45,626 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 306 transitions. Word has length 121 [2022-02-24 02:47:45,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:45,626 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 306 transitions. [2022-02-24 02:47:45,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-24 02:47:45,627 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 306 transitions. [2022-02-24 02:47:45,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-24 02:47:45,628 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:45,628 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:45,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 02:47:45,628 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:45,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:45,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1000289623, now seen corresponding path program 28 times [2022-02-24 02:47:45,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:45,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519607675] [2022-02-24 02:47:45,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:45,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:45,632 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:45,632 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:48,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:48,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:48,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-24 02:47:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:48,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-24 02:47:48,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:48,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-02-24 02:47:48,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:48,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-02-24 02:47:48,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:48,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-02-24 02:47:48,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:48,573 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:48,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519607675] [2022-02-24 02:47:48,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1519607675] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:48,574 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:48,574 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 02:47:48,574 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944158323] [2022-02-24 02:47:48,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:48,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 02:47:48,574 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:48,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 02:47:48,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 02:47:48,575 INFO L87 Difference]: Start difference. First operand 285 states and 306 transitions. Second operand has 36 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:47:52,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:52,533 INFO L93 Difference]: Finished difference Result 387 states and 417 transitions. [2022-02-24 02:47:52,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-24 02:47:52,533 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 121 [2022-02-24 02:47:52,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:52,535 INFO L225 Difference]: With dead ends: 387 [2022-02-24 02:47:52,535 INFO L226 Difference]: Without dead ends: 385 [2022-02-24 02:47:52,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2007 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=760, Invalid=6212, Unknown=0, NotChecked=0, Total=6972 [2022-02-24 02:47:52,535 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 239 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 2281 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 2495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 2281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:52,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 127 Invalid, 2495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 2281 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 02:47:52,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-02-24 02:47:52,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 281. [2022-02-24 02:47:52,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 253 states have (on average 1.051383399209486) internal successors, (266), 255 states have internal predecessors, (266), 18 states have call successors, (18), 11 states have call predecessors, (18), 9 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-24 02:47:52,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 301 transitions. [2022-02-24 02:47:52,819 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 301 transitions. Word has length 121 [2022-02-24 02:47:52,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:52,821 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 301 transitions. [2022-02-24 02:47:52,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:47:52,821 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 301 transitions. [2022-02-24 02:47:52,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-24 02:47:52,835 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:52,836 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:52,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 02:47:52,836 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:52,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:52,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1649839699, now seen corresponding path program 29 times [2022-02-24 02:47:52,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:52,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731524300] [2022-02-24 02:47:52,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:52,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:52,849 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:52,850 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:57,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:57,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:57,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-24 02:47:57,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:57,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-02-24 02:47:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:57,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-02-24 02:47:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:57,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-02-24 02:47:57,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:57,472 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:57,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731524300] [2022-02-24 02:47:57,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [731524300] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:57,473 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:57,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-24 02:47:57,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301334223] [2022-02-24 02:47:57,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:57,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-24 02:47:57,473 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:57,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-24 02:47:57,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1997, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 02:47:57,474 INFO L87 Difference]: Start difference. First operand 281 states and 301 transitions. Second operand has 47 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 02:48:04,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:04,673 INFO L93 Difference]: Finished difference Result 513 states and 559 transitions. [2022-02-24 02:48:04,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-24 02:48:04,673 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 121 [2022-02-24 02:48:04,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:04,675 INFO L225 Difference]: With dead ends: 513 [2022-02-24 02:48:04,675 INFO L226 Difference]: Without dead ends: 511 [2022-02-24 02:48:04,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4115 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1155, Invalid=12651, Unknown=0, NotChecked=0, Total=13806 [2022-02-24 02:48:04,678 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 345 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 4096 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 4440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 4096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:04,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 154 Invalid, 4440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 4096 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-24 02:48:04,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-02-24 02:48:05,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 348. [2022-02-24 02:48:05,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 316 states have (on average 1.0506329113924051) internal successors, (332), 319 states have internal predecessors, (332), 22 states have call successors, (22), 11 states have call predecessors, (22), 9 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-24 02:48:05,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 375 transitions. [2022-02-24 02:48:05,149 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 375 transitions. Word has length 121 [2022-02-24 02:48:05,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:05,149 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 375 transitions. [2022-02-24 02:48:05,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 02:48:05,149 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 375 transitions. [2022-02-24 02:48:05,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-02-24 02:48:05,150 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:05,151 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:05,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 02:48:05,151 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:05,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:05,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1730361516, now seen corresponding path program 30 times [2022-02-24 02:48:05,151 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:05,151 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544117028] [2022-02-24 02:48:05,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:05,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:05,154 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:05,155 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:05,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:05,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:05,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-02-24 02:48:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:05,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-24 02:48:05,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:05,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-02-24 02:48:05,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:05,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-02-24 02:48:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:05,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:05,622 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:05,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544117028] [2022-02-24 02:48:05,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1544117028] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:05,623 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:05,623 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 02:48:05,623 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614825838] [2022-02-24 02:48:05,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:05,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 02:48:05,623 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:05,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 02:48:05,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-02-24 02:48:05,624 INFO L87 Difference]: Start difference. First operand 348 states and 375 transitions. Second operand has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:48:08,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:08,525 INFO L93 Difference]: Finished difference Result 735 states and 819 transitions. [2022-02-24 02:48:08,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 02:48:08,525 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 124 [2022-02-24 02:48:08,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:08,539 INFO L225 Difference]: With dead ends: 735 [2022-02-24 02:48:08,539 INFO L226 Difference]: Without dead ends: 603 [2022-02-24 02:48:08,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=281, Invalid=2799, Unknown=0, NotChecked=0, Total=3080 [2022-02-24 02:48:08,540 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 263 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4146 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 4433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 4146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:08,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 172 Invalid, 4433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 4146 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-24 02:48:08,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-02-24 02:48:08,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 371. [2022-02-24 02:48:08,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 339 states have (on average 1.056047197640118) internal successors, (358), 342 states have internal predecessors, (358), 22 states have call successors, (22), 11 states have call predecessors, (22), 9 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-24 02:48:08,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 401 transitions. [2022-02-24 02:48:08,961 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 401 transitions. Word has length 124 [2022-02-24 02:48:08,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:08,962 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 401 transitions. [2022-02-24 02:48:08,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:48:08,962 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 401 transitions. [2022-02-24 02:48:08,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-24 02:48:08,963 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:08,963 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:08,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 02:48:08,963 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:08,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:08,963 INFO L85 PathProgramCache]: Analyzing trace with hash -708898139, now seen corresponding path program 31 times [2022-02-24 02:48:08,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:08,963 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497842717] [2022-02-24 02:48:08,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:08,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:08,966 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:08,966 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:09,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:09,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:09,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-24 02:48:09,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:09,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-24 02:48:09,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:09,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-24 02:48:09,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:09,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-02-24 02:48:09,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:09,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-02-24 02:48:09,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:09,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-02-24 02:48:09,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:09,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-02-24 02:48:09,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:09,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:09,314 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:09,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497842717] [2022-02-24 02:48:09,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1497842717] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:09,315 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:09,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 02:48:09,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592341088] [2022-02-24 02:48:09,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:09,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 02:48:09,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:09,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 02:48:09,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2022-02-24 02:48:09,316 INFO L87 Difference]: Start difference. First operand 371 states and 401 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-24 02:48:11,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:11,389 INFO L93 Difference]: Finished difference Result 530 states and 569 transitions. [2022-02-24 02:48:11,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 02:48:11,389 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 129 [2022-02-24 02:48:11,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:11,391 INFO L225 Difference]: With dead ends: 530 [2022-02-24 02:48:11,391 INFO L226 Difference]: Without dead ends: 357 [2022-02-24 02:48:11,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=237, Invalid=1169, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 02:48:11,391 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 540 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:11,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 129 Invalid, 1979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 1554 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 02:48:11,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-02-24 02:48:11,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 287. [2022-02-24 02:48:11,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 262 states have (on average 1.049618320610687) internal successors, (275), 264 states have internal predecessors, (275), 17 states have call successors, (17), 9 states have call predecessors, (17), 7 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-24 02:48:11,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 308 transitions. [2022-02-24 02:48:11,651 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 308 transitions. Word has length 129 [2022-02-24 02:48:11,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:11,651 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 308 transitions. [2022-02-24 02:48:11,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-24 02:48:11,652 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 308 transitions. [2022-02-24 02:48:11,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-24 02:48:11,652 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:11,652 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:11,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 02:48:11,652 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:11,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:11,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1964341373, now seen corresponding path program 32 times [2022-02-24 02:48:11,653 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:11,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745610271] [2022-02-24 02:48:11,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:11,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:11,656 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:11,656 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:14,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:14,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-24 02:48:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:14,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-24 02:48:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:14,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-02-24 02:48:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:14,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-02-24 02:48:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:14,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-02-24 02:48:14,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:14,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-02-24 02:48:14,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:14,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:14,303 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:14,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745610271] [2022-02-24 02:48:14,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1745610271] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:14,303 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:14,304 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 02:48:14,304 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319819680] [2022-02-24 02:48:14,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:14,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 02:48:14,309 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:14,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 02:48:14,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 02:48:14,310 INFO L87 Difference]: Start difference. First operand 287 states and 308 transitions. Second operand has 35 states, 34 states have (on average 2.8823529411764706) internal successors, (98), 33 states have internal predecessors, (98), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-24 02:48:18,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:18,303 INFO L93 Difference]: Finished difference Result 351 states and 377 transitions. [2022-02-24 02:48:18,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-24 02:48:18,304 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.8823529411764706) internal successors, (98), 33 states have internal predecessors, (98), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 129 [2022-02-24 02:48:18,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:18,305 INFO L225 Difference]: With dead ends: 351 [2022-02-24 02:48:18,305 INFO L226 Difference]: Without dead ends: 349 [2022-02-24 02:48:18,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 24 SyntacticMatches, 8 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=688, Invalid=5792, Unknown=0, NotChecked=0, Total=6480 [2022-02-24 02:48:18,306 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 243 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 2480 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 2677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 2480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:18,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 120 Invalid, 2677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 2480 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 02:48:18,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-02-24 02:48:18,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 299. [2022-02-24 02:48:18,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 271 states have (on average 1.047970479704797) internal successors, (284), 273 states have internal predecessors, (284), 19 states have call successors, (19), 10 states have call predecessors, (19), 8 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-24 02:48:18,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 321 transitions. [2022-02-24 02:48:18,698 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 321 transitions. Word has length 129 [2022-02-24 02:48:18,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:18,699 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 321 transitions. [2022-02-24 02:48:18,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.8823529411764706) internal successors, (98), 33 states have internal predecessors, (98), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-24 02:48:18,699 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 321 transitions. [2022-02-24 02:48:18,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-24 02:48:18,700 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:18,700 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:18,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 02:48:18,701 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:18,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:18,701 INFO L85 PathProgramCache]: Analyzing trace with hash -102825683, now seen corresponding path program 33 times [2022-02-24 02:48:18,701 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:18,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548535413] [2022-02-24 02:48:18,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:18,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:18,705 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:18,705 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:19,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:21,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:21,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:21,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-24 02:48:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:21,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-02-24 02:48:21,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:21,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-02-24 02:48:21,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:21,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-02-24 02:48:21,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:21,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-02-24 02:48:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:21,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:21,441 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:21,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548535413] [2022-02-24 02:48:21,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1548535413] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:21,442 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:21,442 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 02:48:21,442 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091236705] [2022-02-24 02:48:21,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:21,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 02:48:21,442 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:21,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 02:48:21,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 02:48:21,443 INFO L87 Difference]: Start difference. First operand 299 states and 321 transitions. Second operand has 36 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:48:25,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:25,817 INFO L93 Difference]: Finished difference Result 401 states and 430 transitions. [2022-02-24 02:48:25,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-24 02:48:25,818 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 129 [2022-02-24 02:48:25,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:25,819 INFO L225 Difference]: With dead ends: 401 [2022-02-24 02:48:25,819 INFO L226 Difference]: Without dead ends: 399 [2022-02-24 02:48:25,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2066 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=715, Invalid=6767, Unknown=0, NotChecked=0, Total=7482 [2022-02-24 02:48:25,820 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 223 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 3303 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 3492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 3303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:25,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 173 Invalid, 3492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 3303 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-24 02:48:25,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-02-24 02:48:26,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 295. [2022-02-24 02:48:26,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 268 states have (on average 1.0485074626865671) internal successors, (281), 270 states have internal predecessors, (281), 18 states have call successors, (18), 10 states have call predecessors, (18), 8 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-24 02:48:26,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 316 transitions. [2022-02-24 02:48:26,124 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 316 transitions. Word has length 129 [2022-02-24 02:48:26,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:26,125 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 316 transitions. [2022-02-24 02:48:26,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:48:26,125 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 316 transitions. [2022-02-24 02:48:26,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-24 02:48:26,126 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:26,126 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:26,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 02:48:26,126 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:26,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:26,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1297690251, now seen corresponding path program 34 times [2022-02-24 02:48:26,126 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:26,126 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744638921] [2022-02-24 02:48:26,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:26,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:26,129 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:26,129 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:26,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:28,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:28,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-02-24 02:48:28,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:28,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-02-24 02:48:28,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:28,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-02-24 02:48:28,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:28,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-02-24 02:48:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:28,714 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:28,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744638921] [2022-02-24 02:48:28,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [744638921] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:28,715 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:28,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-24 02:48:28,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314025130] [2022-02-24 02:48:28,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:28,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 02:48:28,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:28,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 02:48:28,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 02:48:28,716 INFO L87 Difference]: Start difference. First operand 295 states and 316 transitions. Second operand has 37 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 02:48:35,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:35,180 INFO L93 Difference]: Finished difference Result 509 states and 554 transitions. [2022-02-24 02:48:35,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-24 02:48:35,180 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 129 [2022-02-24 02:48:35,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:35,182 INFO L225 Difference]: With dead ends: 509 [2022-02-24 02:48:35,182 INFO L226 Difference]: Without dead ends: 507 [2022-02-24 02:48:35,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3454 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=936, Invalid=11054, Unknown=0, NotChecked=0, Total=11990 [2022-02-24 02:48:35,183 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 276 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 3506 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 3779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 3506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:35,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 159 Invalid, 3779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 3506 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-24 02:48:35,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-02-24 02:48:35,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 367. [2022-02-24 02:48:35,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 336 states have (on average 1.0476190476190477) internal successors, (352), 339 states have internal predecessors, (352), 22 states have call successors, (22), 10 states have call predecessors, (22), 8 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-24 02:48:35,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 395 transitions. [2022-02-24 02:48:35,565 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 395 transitions. Word has length 129 [2022-02-24 02:48:35,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:35,566 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 395 transitions. [2022-02-24 02:48:35,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 02:48:35,566 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 395 transitions. [2022-02-24 02:48:35,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-02-24 02:48:35,567 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:35,567 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:35,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 02:48:35,567 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:35,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:35,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1012502556, now seen corresponding path program 35 times [2022-02-24 02:48:35,567 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:35,567 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432026435] [2022-02-24 02:48:35,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:35,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:35,570 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:35,570 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:35,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:36,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:36,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:36,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-24 02:48:36,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:36,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-02-24 02:48:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:36,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-02-24 02:48:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:36,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-02-24 02:48:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:36,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:36,126 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:36,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432026435] [2022-02-24 02:48:36,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1432026435] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:36,126 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:36,126 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 02:48:36,126 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990149377] [2022-02-24 02:48:36,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:36,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 02:48:36,128 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:36,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 02:48:36,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2022-02-24 02:48:36,129 INFO L87 Difference]: Start difference. First operand 367 states and 395 transitions. Second operand has 28 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 27 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:48:40,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:40,129 INFO L93 Difference]: Finished difference Result 772 states and 860 transitions. [2022-02-24 02:48:40,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 02:48:40,130 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 27 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 132 [2022-02-24 02:48:40,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:40,132 INFO L225 Difference]: With dead ends: 772 [2022-02-24 02:48:40,132 INFO L226 Difference]: Without dead ends: 642 [2022-02-24 02:48:40,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=307, Invalid=3353, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 02:48:40,133 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 290 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 4722 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 5045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 4722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:40,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 174 Invalid, 5045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 4722 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-24 02:48:40,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2022-02-24 02:48:40,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 390. [2022-02-24 02:48:40,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 359 states have (on average 1.052924791086351) internal successors, (378), 362 states have internal predecessors, (378), 22 states have call successors, (22), 10 states have call predecessors, (22), 8 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-24 02:48:40,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 421 transitions. [2022-02-24 02:48:40,586 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 421 transitions. Word has length 132 [2022-02-24 02:48:40,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:40,586 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 421 transitions. [2022-02-24 02:48:40,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 27 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:48:40,587 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 421 transitions. [2022-02-24 02:48:40,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-02-24 02:48:40,587 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:40,588 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:40,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 02:48:40,588 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:40,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:40,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1010747997, now seen corresponding path program 36 times [2022-02-24 02:48:40,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:40,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199700951] [2022-02-24 02:48:40,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:40,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:40,591 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:40,591 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:40,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:42,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:42,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:42,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-02-24 02:48:42,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:42,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-24 02:48:42,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:42,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-02-24 02:48:42,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:42,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-02-24 02:48:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:42,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-02-24 02:48:42,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:42,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-02-24 02:48:42,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:42,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-02-24 02:48:42,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:42,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:42,977 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:42,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199700951] [2022-02-24 02:48:42,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1199700951] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:42,977 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:42,977 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 02:48:42,977 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439142921] [2022-02-24 02:48:42,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:42,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 02:48:42,978 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:42,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 02:48:42,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1166, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 02:48:42,978 INFO L87 Difference]: Start difference. First operand 390 states and 421 transitions. Second operand has 36 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-24 02:48:48,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:48,230 INFO L93 Difference]: Finished difference Result 470 states and 506 transitions. [2022-02-24 02:48:48,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-24 02:48:48,231 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 137 [2022-02-24 02:48:48,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:48,232 INFO L225 Difference]: With dead ends: 470 [2022-02-24 02:48:48,232 INFO L226 Difference]: Without dead ends: 468 [2022-02-24 02:48:48,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2027 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=694, Invalid=7496, Unknown=0, NotChecked=0, Total=8190 [2022-02-24 02:48:48,233 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 278 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 3081 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 3345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 3081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:48,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 146 Invalid, 3345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 3081 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-24 02:48:48,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-02-24 02:48:48,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 410. [2022-02-24 02:48:48,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 374 states have (on average 1.0508021390374331) internal successors, (393), 377 states have internal predecessors, (393), 26 states have call successors, (26), 11 states have call predecessors, (26), 9 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2022-02-24 02:48:48,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 444 transitions. [2022-02-24 02:48:48,737 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 444 transitions. Word has length 137 [2022-02-24 02:48:48,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:48,739 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 444 transitions. [2022-02-24 02:48:48,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-24 02:48:48,739 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 444 transitions. [2022-02-24 02:48:48,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-02-24 02:48:48,740 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:48,740 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:48,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 02:48:48,740 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:48,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:48,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1159461383, now seen corresponding path program 37 times [2022-02-24 02:48:48,741 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:48,741 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421831259] [2022-02-24 02:48:48,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:48,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:48,744 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:48,744 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:49,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:50,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:50,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:50,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-24 02:48:50,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:50,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-02-24 02:48:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:50,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-02-24 02:48:50,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:50,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-02-24 02:48:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:50,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-02-24 02:48:50,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:50,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-02-24 02:48:50,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:50,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:50,854 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:50,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421831259] [2022-02-24 02:48:50,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1421831259] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:50,854 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:50,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 02:48:50,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249483026] [2022-02-24 02:48:50,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:50,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 02:48:50,854 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:50,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 02:48:50,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 02:48:50,855 INFO L87 Difference]: Start difference. First operand 410 states and 444 transitions. Second operand has 36 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-24 02:48:55,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:55,357 INFO L93 Difference]: Finished difference Result 544 states and 585 transitions. [2022-02-24 02:48:55,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-24 02:48:55,357 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 137 [2022-02-24 02:48:55,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:55,359 INFO L225 Difference]: With dead ends: 544 [2022-02-24 02:48:55,359 INFO L226 Difference]: Without dead ends: 542 [2022-02-24 02:48:55,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1968 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=668, Invalid=6304, Unknown=0, NotChecked=0, Total=6972 [2022-02-24 02:48:55,360 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 305 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 2847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:55,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 91 Invalid, 2847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 2592 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 02:48:55,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-02-24 02:48:55,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 426. [2022-02-24 02:48:55,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 386 states have (on average 1.049222797927461) internal successors, (405), 389 states have internal predecessors, (405), 28 states have call successors, (28), 13 states have call predecessors, (28), 11 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2022-02-24 02:48:55,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 460 transitions. [2022-02-24 02:48:55,928 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 460 transitions. Word has length 137 [2022-02-24 02:48:55,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:55,929 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 460 transitions. [2022-02-24 02:48:55,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-24 02:48:55,929 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 460 transitions. [2022-02-24 02:48:55,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-02-24 02:48:55,930 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:55,930 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:55,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 02:48:55,930 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:55,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:55,930 INFO L85 PathProgramCache]: Analyzing trace with hash -147199643, now seen corresponding path program 38 times [2022-02-24 02:48:55,931 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:55,931 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166077617] [2022-02-24 02:48:55,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:55,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:55,933 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:55,933 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:59,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:59,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-02-24 02:48:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:59,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-02-24 02:48:59,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:59,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-02-24 02:48:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:59,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-02-24 02:48:59,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:59,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-02-24 02:48:59,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:59,453 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:59,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166077617] [2022-02-24 02:48:59,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [166077617] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:59,453 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:59,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-02-24 02:48:59,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553323516] [2022-02-24 02:48:59,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:59,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-24 02:48:59,454 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:59,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-24 02:48:59,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1568, Unknown=0, NotChecked=0, Total=1722 [2022-02-24 02:48:59,456 INFO L87 Difference]: Start difference. First operand 426 states and 460 transitions. Second operand has 42 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:49:06,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:06,327 INFO L93 Difference]: Finished difference Result 618 states and 666 transitions. [2022-02-24 02:49:06,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-24 02:49:06,327 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 137 [2022-02-24 02:49:06,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:06,329 INFO L225 Difference]: With dead ends: 618 [2022-02-24 02:49:06,329 INFO L226 Difference]: Without dead ends: 616 [2022-02-24 02:49:06,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3194 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=971, Invalid=10159, Unknown=0, NotChecked=0, Total=11130 [2022-02-24 02:49:06,331 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 303 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 3880 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 4172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 3880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:06,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 153 Invalid, 4172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 3880 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-24 02:49:06,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-02-24 02:49:06,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 426. [2022-02-24 02:49:06,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 386 states have (on average 1.049222797927461) internal successors, (405), 389 states have internal predecessors, (405), 27 states have call successors, (27), 14 states have call predecessors, (27), 12 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-24 02:49:06,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 458 transitions. [2022-02-24 02:49:06,962 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 458 transitions. Word has length 137 [2022-02-24 02:49:06,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:06,962 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 458 transitions. [2022-02-24 02:49:06,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:49:06,962 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 458 transitions. [2022-02-24 02:49:06,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-02-24 02:49:06,963 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:06,963 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:06,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 02:49:06,964 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:06,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:06,964 INFO L85 PathProgramCache]: Analyzing trace with hash -2101626225, now seen corresponding path program 39 times [2022-02-24 02:49:06,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:06,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036490035] [2022-02-24 02:49:06,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:06,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:06,967 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:06,967 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:11,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:11,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-02-24 02:49:11,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:11,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-02-24 02:49:11,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:11,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-02-24 02:49:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:11,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-02-24 02:49:11,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:11,441 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:11,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036490035] [2022-02-24 02:49:11,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2036490035] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:11,442 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:11,442 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-02-24 02:49:11,442 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718972932] [2022-02-24 02:49:11,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:11,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-24 02:49:11,442 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:11,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-24 02:49:11,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1789, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 02:49:11,443 INFO L87 Difference]: Start difference. First operand 426 states and 458 transitions. Second operand has 45 states, 44 states have (on average 2.159090909090909) internal successors, (95), 43 states have internal predecessors, (95), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 02:49:21,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:21,412 INFO L93 Difference]: Finished difference Result 769 states and 835 transitions. [2022-02-24 02:49:21,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-24 02:49:21,412 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.159090909090909) internal successors, (95), 43 states have internal predecessors, (95), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 137 [2022-02-24 02:49:21,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:21,414 INFO L225 Difference]: With dead ends: 769 [2022-02-24 02:49:21,414 INFO L226 Difference]: Without dead ends: 767 [2022-02-24 02:49:21,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4513 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1424, Invalid=13582, Unknown=0, NotChecked=0, Total=15006 [2022-02-24 02:49:21,441 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 440 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 4689 mSolverCounterSat, 499 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 5188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 499 IncrementalHoareTripleChecker+Valid, 4689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:21,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 138 Invalid, 5188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [499 Valid, 4689 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-02-24 02:49:21,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2022-02-24 02:49:22,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 503. [2022-02-24 02:49:22,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 459 states have (on average 1.0479302832244008) internal successors, (481), 463 states have internal predecessors, (481), 31 states have call successors, (31), 14 states have call predecessors, (31), 12 states have return successors, (30), 25 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-24 02:49:22,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 542 transitions. [2022-02-24 02:49:22,112 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 542 transitions. Word has length 137 [2022-02-24 02:49:22,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:22,112 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 542 transitions. [2022-02-24 02:49:22,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.159090909090909) internal successors, (95), 43 states have internal predecessors, (95), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 02:49:22,113 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 542 transitions. [2022-02-24 02:49:22,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-02-24 02:49:22,114 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:22,114 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:22,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 02:49:22,114 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:22,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:22,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1208128232, now seen corresponding path program 40 times [2022-02-24 02:49:22,114 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:22,114 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508307589] [2022-02-24 02:49:22,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:22,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:22,117 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:22,117 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:22,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:22,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:22,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-02-24 02:49:22,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:22,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-02-24 02:49:22,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:22,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-02-24 02:49:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:22,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-02-24 02:49:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:22,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:22,651 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:22,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508307589] [2022-02-24 02:49:22,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [508307589] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:22,652 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:22,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 02:49:22,652 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000753885] [2022-02-24 02:49:22,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:22,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 02:49:22,652 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:22,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 02:49:22,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-02-24 02:49:22,653 INFO L87 Difference]: Start difference. First operand 503 states and 542 transitions. Second operand has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 29 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:49:27,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:27,262 INFO L93 Difference]: Finished difference Result 1105 states and 1226 transitions. [2022-02-24 02:49:27,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-24 02:49:27,262 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 29 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 140 [2022-02-24 02:49:27,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:27,266 INFO L225 Difference]: With dead ends: 1105 [2022-02-24 02:49:27,266 INFO L226 Difference]: Without dead ends: 922 [2022-02-24 02:49:27,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=333, Invalid=3957, Unknown=0, NotChecked=0, Total=4290 [2022-02-24 02:49:27,268 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 322 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 5543 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 5899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 5543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:27,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 184 Invalid, 5899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 5543 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-24 02:49:27,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-02-24 02:49:28,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 532. [2022-02-24 02:49:28,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 488 states have (on average 1.0532786885245902) internal successors, (514), 492 states have internal predecessors, (514), 31 states have call successors, (31), 14 states have call predecessors, (31), 12 states have return successors, (30), 25 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-24 02:49:28,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 575 transitions. [2022-02-24 02:49:28,086 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 575 transitions. Word has length 140 [2022-02-24 02:49:28,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:28,086 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 575 transitions. [2022-02-24 02:49:28,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 29 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:49:28,087 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 575 transitions. [2022-02-24 02:49:28,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-02-24 02:49:28,088 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:28,088 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:28,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 02:49:28,088 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:28,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:28,089 INFO L85 PathProgramCache]: Analyzing trace with hash 573012193, now seen corresponding path program 41 times [2022-02-24 02:49:28,089 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:28,089 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899372985] [2022-02-24 02:49:28,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:28,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:28,093 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:28,093 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:28,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:29,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:29,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-24 02:49:29,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:29,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-02-24 02:49:29,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:29,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-02-24 02:49:29,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:29,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-02-24 02:49:29,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:29,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-02-24 02:49:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:29,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-02-24 02:49:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:29,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-02-24 02:49:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:29,892 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:29,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899372985] [2022-02-24 02:49:29,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [899372985] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:29,892 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:29,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 02:49:29,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245810936] [2022-02-24 02:49:29,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:29,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 02:49:29,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:29,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 02:49:29,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2022-02-24 02:49:29,893 INFO L87 Difference]: Start difference. First operand 532 states and 575 transitions. Second operand has 29 states, 28 states have (on average 3.0357142857142856) internal successors, (85), 27 states have internal predecessors, (85), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-24 02:49:33,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:33,846 INFO L93 Difference]: Finished difference Result 778 states and 831 transitions. [2022-02-24 02:49:33,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-24 02:49:33,847 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.0357142857142856) internal successors, (85), 27 states have internal predecessors, (85), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 145 [2022-02-24 02:49:33,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:33,849 INFO L225 Difference]: With dead ends: 778 [2022-02-24 02:49:33,849 INFO L226 Difference]: Without dead ends: 776 [2022-02-24 02:49:33,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=468, Invalid=3692, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 02:49:33,850 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 287 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2427 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 2653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 2427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:33,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 83 Invalid, 2653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 2427 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 02:49:33,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-02-24 02:49:34,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 560. [2022-02-24 02:49:34,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 509 states have (on average 1.0510805500982319) internal successors, (535), 513 states have internal predecessors, (535), 37 states have call successors, (37), 15 states have call predecessors, (37), 13 states have return successors, (36), 31 states have call predecessors, (36), 36 states have call successors, (36) [2022-02-24 02:49:34,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 608 transitions. [2022-02-24 02:49:34,788 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 608 transitions. Word has length 145 [2022-02-24 02:49:34,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:34,788 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 608 transitions. [2022-02-24 02:49:34,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.0357142857142856) internal successors, (85), 27 states have internal predecessors, (85), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-24 02:49:34,788 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 608 transitions. [2022-02-24 02:49:34,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-02-24 02:49:34,789 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:34,789 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:34,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 02:49:34,789 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:34,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:34,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1140381121, now seen corresponding path program 42 times [2022-02-24 02:49:34,790 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:34,790 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465993101] [2022-02-24 02:49:34,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:34,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:34,793 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:34,793 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:39,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:39,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-02-24 02:49:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:39,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-02-24 02:49:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:39,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-02-24 02:49:39,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:39,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-02-24 02:49:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:39,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-02-24 02:49:39,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:39,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-02-24 02:49:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:39,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:39,116 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:39,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465993101] [2022-02-24 02:49:39,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1465993101] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:39,116 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:39,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-24 02:49:39,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66318727] [2022-02-24 02:49:39,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:39,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-24 02:49:39,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:39,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-24 02:49:39,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2004, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 02:49:39,117 INFO L87 Difference]: Start difference. First operand 560 states and 608 transitions. Second operand has 47 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 46 states have internal predecessors, (103), 8 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-24 02:49:49,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:49,411 INFO L93 Difference]: Finished difference Result 786 states and 847 transitions. [2022-02-24 02:49:49,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-24 02:49:49,412 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 46 states have internal predecessors, (103), 8 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 145 [2022-02-24 02:49:49,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:49,414 INFO L225 Difference]: With dead ends: 786 [2022-02-24 02:49:49,414 INFO L226 Difference]: Without dead ends: 784 [2022-02-24 02:49:49,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3549 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1166, Invalid=12406, Unknown=0, NotChecked=0, Total=13572 [2022-02-24 02:49:49,416 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 339 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 4958 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 5278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 4958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:49,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 213 Invalid, 5278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 4958 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-02-24 02:49:49,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2022-02-24 02:49:50,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 564. [2022-02-24 02:49:50,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 512 states have (on average 1.05078125) internal successors, (538), 516 states have internal predecessors, (538), 38 states have call successors, (38), 15 states have call predecessors, (38), 13 states have return successors, (37), 32 states have call predecessors, (37), 37 states have call successors, (37) [2022-02-24 02:49:50,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 613 transitions. [2022-02-24 02:49:50,432 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 613 transitions. Word has length 145 [2022-02-24 02:49:50,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:50,432 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 613 transitions. [2022-02-24 02:49:50,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 46 states have internal predecessors, (103), 8 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-24 02:49:50,433 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 613 transitions. [2022-02-24 02:49:50,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-02-24 02:49:50,434 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:50,434 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:50,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 02:49:50,434 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:50,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:50,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1751265641, now seen corresponding path program 43 times [2022-02-24 02:49:50,434 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:50,434 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314952960] [2022-02-24 02:49:50,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:50,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:50,437 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:50,437 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:53,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:53,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:53,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-02-24 02:49:53,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:53,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-02-24 02:49:53,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:53,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-02-24 02:49:53,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:53,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-02-24 02:49:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:53,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-02-24 02:49:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:53,667 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:53,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314952960] [2022-02-24 02:49:53,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [314952960] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:53,667 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:53,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-02-24 02:49:53,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774303922] [2022-02-24 02:49:53,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:53,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-24 02:49:53,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:53,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-24 02:49:53,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1647, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 02:49:53,668 INFO L87 Difference]: Start difference. First operand 564 states and 613 transitions. Second operand has 43 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:50:01,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:50:01,069 INFO L93 Difference]: Finished difference Result 902 states and 971 transitions. [2022-02-24 02:50:01,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-24 02:50:01,070 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 145 [2022-02-24 02:50:01,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:50:01,073 INFO L225 Difference]: With dead ends: 902 [2022-02-24 02:50:01,073 INFO L226 Difference]: Without dead ends: 900 [2022-02-24 02:50:01,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4267 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1146, Invalid=12896, Unknown=0, NotChecked=0, Total=14042 [2022-02-24 02:50:01,074 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 334 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 4626 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 4955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 4626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:50:01,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 179 Invalid, 4955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 4626 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-24 02:50:01,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2022-02-24 02:50:02,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 580. [2022-02-24 02:50:02,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 524 states have (on average 1.049618320610687) internal successors, (550), 528 states have internal predecessors, (550), 39 states have call successors, (39), 18 states have call predecessors, (39), 16 states have return successors, (38), 33 states have call predecessors, (38), 38 states have call successors, (38) [2022-02-24 02:50:02,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 627 transitions. [2022-02-24 02:50:02,152 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 627 transitions. Word has length 145 [2022-02-24 02:50:02,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:50:02,152 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 627 transitions. [2022-02-24 02:50:02,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:50:02,153 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 627 transitions. [2022-02-24 02:50:02,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-02-24 02:50:02,153 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:50:02,154 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:50:02,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 02:50:02,154 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:50:02,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:50:02,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1262336839, now seen corresponding path program 44 times [2022-02-24 02:50:02,154 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:50:02,154 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587509839] [2022-02-24 02:50:02,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:50:02,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:50:02,158 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:50:02,158 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:50:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat