/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 19:36:54,999 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 19:36:55,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 19:36:55,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 19:36:55,091 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 19:36:55,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 19:36:55,092 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 19:36:55,093 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 19:36:55,093 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 19:36:55,094 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 19:36:55,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 19:36:55,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 19:36:55,096 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 19:36:55,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 19:36:55,101 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 19:36:55,102 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 19:36:55,104 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 19:36:55,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 19:36:55,110 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 19:36:55,110 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 19:36:55,113 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 19:36:55,140 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 19:36:55,141 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 19:36:55,142 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 19:36:55,142 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 19:36:55,142 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 19:36:55,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 19:36:55,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 19:36:55,143 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 19:36:55,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 19:36:55,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 19:36:55,143 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 19:36:55,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 19:36:55,144 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 19:36:55,144 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 19:36:55,144 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 19:36:55,144 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 19:36:55,144 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 19:36:55,144 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 19:36:55,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:36:55,145 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 19:36:55,145 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 19:36:55,148 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 19:36:55,148 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 19:36:55,149 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 19:36:55,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 19:36:55,371 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 19:36:55,372 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 19:36:55,373 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 19:36:55,373 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 19:36:55,374 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m2.c [2022-01-31 19:36:55,418 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20409adbc/152b1cb4b2e1497fac12d0193c9d3d0c/FLAG931343357 [2022-01-31 19:36:55,776 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 19:36:55,776 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const_m2.c [2022-01-31 19:36:55,780 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20409adbc/152b1cb4b2e1497fac12d0193c9d3d0c/FLAG931343357 [2022-01-31 19:36:55,788 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20409adbc/152b1cb4b2e1497fac12d0193c9d3d0c [2022-01-31 19:36:55,790 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 19:36:55,791 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 19:36:55,792 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 19:36:55,792 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 19:36:55,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 19:36:55,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:36:55" (1/1) ... [2022-01-31 19:36:55,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@733310bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:36:55, skipping insertion in model container [2022-01-31 19:36:55,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:36:55" (1/1) ... [2022-01-31 19:36:55,799 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 19:36:55,808 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 19:36:55,964 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const_m2.c[408,421] [2022-01-31 19:36:55,981 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:36:55,986 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 19:36:55,994 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const_m2.c[408,421] [2022-01-31 19:36:55,998 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:36:56,005 INFO L208 MainTranslator]: Completed translation [2022-01-31 19:36:56,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:36:56 WrapperNode [2022-01-31 19:36:56,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 19:36:56,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 19:36:56,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 19:36:56,007 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 19:36:56,013 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:36:56" (1/1) ... [2022-01-31 19:36:56,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:36:56" (1/1) ... [2022-01-31 19:36:56,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:36:56" (1/1) ... [2022-01-31 19:36:56,018 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:36:56" (1/1) ... [2022-01-31 19:36:56,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:36:56" (1/1) ... [2022-01-31 19:36:56,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:36:56" (1/1) ... [2022-01-31 19:36:56,025 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:36:56" (1/1) ... [2022-01-31 19:36:56,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 19:36:56,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 19:36:56,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 19:36:56,027 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 19:36:56,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:36:56" (1/1) ... [2022-01-31 19:36:56,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:36:56,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 19:36:56,069 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 19:36:56,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 19:36:56,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 19:36:56,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 19:36:56,106 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 19:36:56,106 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 19:36:56,106 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 19:36:56,106 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 19:36:56,107 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 19:36:56,107 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 19:36:56,107 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 19:36:56,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 19:36:56,107 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 19:36:56,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 19:36:56,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-01-31 19:36:56,108 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 19:36:56,109 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 19:36:56,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 19:36:56,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 19:36:56,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 19:36:56,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 19:36:56,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 19:36:56,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 19:36:56,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 19:36:56,157 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 19:36:56,158 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 19:36:56,305 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 19:36:56,309 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 19:36:56,309 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-31 19:36:56,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:36:56 BoogieIcfgContainer [2022-01-31 19:36:56,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 19:36:56,312 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 19:36:56,312 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 19:36:56,315 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 19:36:56,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:36:55" (1/3) ... [2022-01-31 19:36:56,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@88136bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:36:56, skipping insertion in model container [2022-01-31 19:36:56,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:36:56" (2/3) ... [2022-01-31 19:36:56,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@88136bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:36:56, skipping insertion in model container [2022-01-31 19:36:56,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:36:56" (3/3) ... [2022-01-31 19:36:56,317 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m2.c [2022-01-31 19:36:56,330 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 19:36:56,330 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 19:36:56,377 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 19:36:56,382 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-01-31 19:36:56,382 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 19:36:56,401 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.52) internal successors, (38), 27 states have internal predecessors, (38), 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) [2022-01-31 19:36:56,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 19:36:56,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:36:56,407 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] [2022-01-31 19:36:56,408 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:36:56,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:36:56,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1320960155, now seen corresponding path program 1 times [2022-01-31 19:36:56,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:36:56,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117486893] [2022-01-31 19:36:56,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:36:56,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:36:56,482 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:36:56,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:56,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:36:56,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:36:56,668 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:36:56,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117486893] [2022-01-31 19:36:56,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [117486893] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:36:56,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:36:56,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 19:36:56,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738472745] [2022-01-31 19:36:56,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:36:56,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 19:36:56,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:36:56,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 19:36:56,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 19:36:56,699 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.52) internal successors, (38), 27 states have internal predecessors, (38), 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 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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) [2022-01-31 19:36:56,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:36:56,787 INFO L93 Difference]: Finished difference Result 59 states and 81 transitions. [2022-01-31 19:36:56,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 19:36:56,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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 20 [2022-01-31 19:36:56,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:36:56,799 INFO L225 Difference]: With dead ends: 59 [2022-01-31 19:36:56,799 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 19:36:56,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 19:36:56,805 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:36:56,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 49 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:36:56,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 19:36:56,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-01-31 19:36:56,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 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) [2022-01-31 19:36:56,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-31 19:36:56,837 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 20 [2022-01-31 19:36:56,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:36:56,837 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-31 19:36:56,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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) [2022-01-31 19:36:56,838 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-31 19:36:56,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 19:36:56,839 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:36:56,839 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] [2022-01-31 19:36:56,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 19:36:56,839 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:36:56,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:36:56,840 INFO L85 PathProgramCache]: Analyzing trace with hash -2102312655, now seen corresponding path program 1 times [2022-01-31 19:36:56,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:36:56,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227343379] [2022-01-31 19:36:56,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:36:56,857 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:36:56,857 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:36:56,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:36:56,861 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:36:56,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:56,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:36:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:56,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:36:56,966 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:36:56,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227343379] [2022-01-31 19:36:56,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1227343379] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:36:56,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:36:56,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 19:36:56,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286582167] [2022-01-31 19:36:56,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:36:56,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 19:36:56,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:36:56,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 19:36:56,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:36:56,968 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-01-31 19:36:57,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:36:57,062 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2022-01-31 19:36:57,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 19:36:57,063 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 22 [2022-01-31 19:36:57,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:36:57,064 INFO L225 Difference]: With dead ends: 50 [2022-01-31 19:36:57,064 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 19:36:57,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 19:36:57,068 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 32 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:36:57,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 21 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:36:57,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 19:36:57,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2022-01-31 19:36:57,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 3 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) [2022-01-31 19:36:57,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-01-31 19:36:57,075 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2022-01-31 19:36:57,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:36:57,075 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-01-31 19:36:57,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-01-31 19:36:57,076 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-01-31 19:36:57,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 19:36:57,076 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:36:57,076 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, 1, 1, 1, 1, 1] [2022-01-31 19:36:57,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 19:36:57,076 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:36:57,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:36:57,077 INFO L85 PathProgramCache]: Analyzing trace with hash -18623191, now seen corresponding path program 1 times [2022-01-31 19:36:57,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:36:57,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175706969] [2022-01-31 19:36:57,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:36:57,078 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:36:57,079 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:36:57,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:36:57,080 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:36:57,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:57,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:36:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:57,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:36:57,136 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:36:57,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175706969] [2022-01-31 19:36:57,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1175706969] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:36:57,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:36:57,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 19:36:57,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679476570] [2022-01-31 19:36:57,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:36:57,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 19:36:57,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:36:57,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 19:36:57,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:36:57,138 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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) [2022-01-31 19:36:57,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:36:57,183 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-01-31 19:36:57,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 19:36:57,183 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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 30 [2022-01-31 19:36:57,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:36:57,183 INFO L225 Difference]: With dead ends: 54 [2022-01-31 19:36:57,184 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 19:36:57,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:36:57,185 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:36:57,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 36 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 19:36:57,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 19:36:57,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-31 19:36:57,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 3 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) [2022-01-31 19:36:57,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-01-31 19:36:57,190 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 30 [2022-01-31 19:36:57,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:36:57,190 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-01-31 19:36:57,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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) [2022-01-31 19:36:57,190 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-01-31 19:36:57,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 19:36:57,191 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:36:57,191 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2022-01-31 19:36:57,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 19:36:57,191 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:36:57,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:36:57,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1635812359, now seen corresponding path program 2 times [2022-01-31 19:36:57,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:36:57,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628623018] [2022-01-31 19:36:57,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:36:57,194 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:36:57,194 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:36:57,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:36:57,195 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:36:57,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:57,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:36:57,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:57,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:36:57,255 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:36:57,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628623018] [2022-01-31 19:36:57,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1628623018] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:36:57,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:36:57,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 19:36:57,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045802154] [2022-01-31 19:36:57,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:36:57,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 19:36:57,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:36:57,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 19:36:57,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 19:36:57,257 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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) [2022-01-31 19:36:57,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:36:57,331 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-01-31 19:36:57,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 19:36:57,331 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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 32 [2022-01-31 19:36:57,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:36:57,332 INFO L225 Difference]: With dead ends: 58 [2022-01-31 19:36:57,332 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 19:36:57,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-31 19:36:57,333 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 37 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:36:57,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 25 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:36:57,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 19:36:57,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-01-31 19:36:57,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 3 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) [2022-01-31 19:36:57,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-01-31 19:36:57,339 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2022-01-31 19:36:57,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:36:57,339 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-01-31 19:36:57,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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) [2022-01-31 19:36:57,339 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-01-31 19:36:57,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 19:36:57,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:36:57,340 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2022-01-31 19:36:57,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 19:36:57,340 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:36:57,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:36:57,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1580155391, now seen corresponding path program 3 times [2022-01-31 19:36:57,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:36:57,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465826750] [2022-01-31 19:36:57,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:36:57,342 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:36:57,342 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:36:57,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:36:57,343 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:36:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:58,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:36:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:58,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:36:58,266 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:36:58,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465826750] [2022-01-31 19:36:58,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [465826750] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:36:58,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:36:58,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 19:36:58,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242479364] [2022-01-31 19:36:58,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:36:58,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 19:36:58,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:36:58,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 19:36:58,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2022-01-31 19:36:58,268 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 23 states have internal predecessors, (36), 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) [2022-01-31 19:36:58,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:36:58,648 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2022-01-31 19:36:58,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 19:36:58,652 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 23 states have internal predecessors, (36), 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 40 [2022-01-31 19:36:58,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:36:58,658 INFO L225 Difference]: With dead ends: 67 [2022-01-31 19:36:58,658 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 19:36:58,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2022-01-31 19:36:58,661 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:36:58,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 145 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:36:58,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 19:36:58,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2022-01-31 19:36:58,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 3 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) [2022-01-31 19:36:58,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2022-01-31 19:36:58,676 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 40 [2022-01-31 19:36:58,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:36:58,676 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2022-01-31 19:36:58,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 23 states have internal predecessors, (36), 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) [2022-01-31 19:36:58,676 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2022-01-31 19:36:58,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 19:36:58,677 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:36:58,678 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1] [2022-01-31 19:36:58,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 19:36:58,678 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:36:58,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:36:58,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1604297437, now seen corresponding path program 4 times [2022-01-31 19:36:58,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:36:58,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378128164] [2022-01-31 19:36:58,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:36:58,680 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:36:58,680 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:36:58,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:36:58,681 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:36:58,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:58,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:36:58,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:36:58,765 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:36:58,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378128164] [2022-01-31 19:36:58,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [378128164] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:36:58,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:36:58,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 19:36:58,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291356766] [2022-01-31 19:36:58,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:36:58,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 19:36:58,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:36:58,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 19:36:58,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-01-31 19:36:58,766 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 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) [2022-01-31 19:36:58,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:36:58,931 INFO L93 Difference]: Finished difference Result 122 states and 138 transitions. [2022-01-31 19:36:58,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 19:36:58,932 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 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 42 [2022-01-31 19:36:58,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:36:58,932 INFO L225 Difference]: With dead ends: 122 [2022-01-31 19:36:58,933 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 19:36:58,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-01-31 19:36:58,933 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 67 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:36:58,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 37 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:36:58,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 19:36:58,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 61. [2022-01-31 19:36:58,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.125) internal successors, (63), 56 states have internal predecessors, (63), 3 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) [2022-01-31 19:36:58,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2022-01-31 19:36:58,941 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 42 [2022-01-31 19:36:58,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:36:58,941 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2022-01-31 19:36:58,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 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) [2022-01-31 19:36:58,941 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2022-01-31 19:36:58,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 19:36:58,942 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:36:58,942 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2022-01-31 19:36:58,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 19:36:58,942 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:36:58,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:36:58,943 INFO L85 PathProgramCache]: Analyzing trace with hash -800164613, now seen corresponding path program 5 times [2022-01-31 19:36:58,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:36:58,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258250506] [2022-01-31 19:36:58,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:36:58,944 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:36:58,944 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:36:58,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:36:58,945 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:36:58,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:59,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:36:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:59,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:36:59,004 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:36:59,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258250506] [2022-01-31 19:36:59,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1258250506] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:36:59,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:36:59,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 19:36:59,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870462714] [2022-01-31 19:36:59,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:36:59,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 19:36:59,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:36:59,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 19:36:59,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-31 19:36:59,005 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 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) [2022-01-31 19:36:59,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:36:59,144 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2022-01-31 19:36:59,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 19:36:59,144 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 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 44 [2022-01-31 19:36:59,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:36:59,145 INFO L225 Difference]: With dead ends: 68 [2022-01-31 19:36:59,145 INFO L226 Difference]: Without dead ends: 51 [2022-01-31 19:36:59,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:36:59,147 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 77 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:36:59,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 37 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:36:59,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-31 19:36:59,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-01-31 19:36:59,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 3 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) [2022-01-31 19:36:59,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2022-01-31 19:36:59,154 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 44 [2022-01-31 19:36:59,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:36:59,154 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2022-01-31 19:36:59,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 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) [2022-01-31 19:36:59,155 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2022-01-31 19:36:59,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 19:36:59,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:36:59,155 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:36:59,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 19:36:59,155 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:36:59,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:36:59,156 INFO L85 PathProgramCache]: Analyzing trace with hash -2015110315, now seen corresponding path program 6 times [2022-01-31 19:36:59,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:36:59,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247664988] [2022-01-31 19:36:59,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:36:59,157 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:36:59,157 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:36:59,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:36:59,158 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:36:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:00,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:37:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:00,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:37:00,767 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:37:00,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247664988] [2022-01-31 19:37:00,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1247664988] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:37:00,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:37:00,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 19:37:00,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793076275] [2022-01-31 19:37:00,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:37:00,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 19:37:00,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:37:00,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 19:37:00,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1430, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 19:37:00,769 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 40 states, 40 states have (on average 1.15) internal successors, (46), 38 states have internal predecessors, (46), 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) [2022-01-31 19:37:02,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:37:02,770 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2022-01-31 19:37:02,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 19:37:02,770 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.15) internal successors, (46), 38 states have internal predecessors, (46), 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 50 [2022-01-31 19:37:02,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:37:02,771 INFO L225 Difference]: With dead ends: 85 [2022-01-31 19:37:02,771 INFO L226 Difference]: Without dead ends: 80 [2022-01-31 19:37:02,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=357, Invalid=3933, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 19:37:02,772 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 19 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:37:02,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 161 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1035 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:37:02,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-31 19:37:02,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2022-01-31 19:37:02,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 67 states have internal predecessors, (75), 3 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) [2022-01-31 19:37:02,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2022-01-31 19:37:02,784 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 50 [2022-01-31 19:37:02,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:37:02,785 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2022-01-31 19:37:02,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.15) internal successors, (46), 38 states have internal predecessors, (46), 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) [2022-01-31 19:37:02,785 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2022-01-31 19:37:02,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 19:37:02,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:37:02,785 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:37:02,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 19:37:02,786 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:37:02,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:37:02,786 INFO L85 PathProgramCache]: Analyzing trace with hash -162918733, now seen corresponding path program 7 times [2022-01-31 19:37:02,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:37:02,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574484692] [2022-01-31 19:37:02,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:37:02,787 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:37:02,787 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:37:02,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:37:02,788 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:37:02,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:02,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:37:02,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:02,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:37:02,892 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:37:02,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574484692] [2022-01-31 19:37:02,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [574484692] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:37:02,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:37:02,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 19:37:02,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060553501] [2022-01-31 19:37:02,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:37:02,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 19:37:02,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:37:02,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 19:37:02,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-01-31 19:37:02,893 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 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) [2022-01-31 19:37:03,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:37:03,131 INFO L93 Difference]: Finished difference Result 150 states and 166 transitions. [2022-01-31 19:37:03,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 19:37:03,131 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 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 52 [2022-01-31 19:37:03,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:37:03,132 INFO L225 Difference]: With dead ends: 150 [2022-01-31 19:37:03,132 INFO L226 Difference]: Without dead ends: 87 [2022-01-31 19:37:03,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:37:03,133 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 97 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:37:03,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 37 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:37:03,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-31 19:37:03,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2022-01-31 19:37:03,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.1) internal successors, (77), 70 states have internal predecessors, (77), 3 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) [2022-01-31 19:37:03,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2022-01-31 19:37:03,143 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 52 [2022-01-31 19:37:03,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:37:03,143 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2022-01-31 19:37:03,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 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) [2022-01-31 19:37:03,144 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2022-01-31 19:37:03,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 19:37:03,144 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:37:03,144 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:37:03,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 19:37:03,144 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:37:03,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:37:03,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1929999185, now seen corresponding path program 8 times [2022-01-31 19:37:03,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:37:03,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118775621] [2022-01-31 19:37:03,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:37:03,146 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:37:03,146 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:37:03,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:37:03,147 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:37:03,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:03,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:37:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:37:03,220 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:37:03,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118775621] [2022-01-31 19:37:03,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1118775621] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:37:03,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:37:03,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 19:37:03,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525430445] [2022-01-31 19:37:03,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:37:03,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 19:37:03,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:37:03,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 19:37:03,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-31 19:37:03,222 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 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) [2022-01-31 19:37:03,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:37:03,404 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2022-01-31 19:37:03,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 19:37:03,404 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 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 54 [2022-01-31 19:37:03,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:37:03,405 INFO L225 Difference]: With dead ends: 82 [2022-01-31 19:37:03,405 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 19:37:03,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:37:03,406 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 107 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:37:03,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 41 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:37:03,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 19:37:03,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-01-31 19:37:03,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 56 states have internal predecessors, (61), 3 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) [2022-01-31 19:37:03,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2022-01-31 19:37:03,414 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 54 [2022-01-31 19:37:03,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:37:03,414 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2022-01-31 19:37:03,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 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) [2022-01-31 19:37:03,414 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2022-01-31 19:37:03,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 19:37:03,414 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:37:03,415 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:37:03,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 19:37:03,415 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:37:03,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:37:03,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1318846763, now seen corresponding path program 9 times [2022-01-31 19:37:03,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:37:03,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669848420] [2022-01-31 19:37:03,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:37:03,416 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:37:03,416 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:37:03,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:37:03,417 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:37:03,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:05,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:37:05,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:05,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:37:05,673 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:37:05,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669848420] [2022-01-31 19:37:05,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1669848420] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:37:05,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:37:05,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 19:37:05,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614091058] [2022-01-31 19:37:05,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:37:05,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 19:37:05,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:37:05,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 19:37:05,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=2212, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 19:37:05,674 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 50 states, 50 states have (on average 1.12) internal successors, (56), 48 states have internal predecessors, (56), 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) [2022-01-31 19:37:08,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:37:08,194 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2022-01-31 19:37:08,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 19:37:08,195 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.12) internal successors, (56), 48 states have internal predecessors, (56), 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 60 [2022-01-31 19:37:08,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:37:08,195 INFO L225 Difference]: With dead ends: 112 [2022-01-31 19:37:08,195 INFO L226 Difference]: Without dead ends: 107 [2022-01-31 19:37:08,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=560, Invalid=5760, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 19:37:08,197 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 27 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 1529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:37:08,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 191 Invalid, 1529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:37:08,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-31 19:37:08,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 96. [2022-01-31 19:37:08,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.098901098901099) internal successors, (100), 91 states have internal predecessors, (100), 3 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) [2022-01-31 19:37:08,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2022-01-31 19:37:08,212 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 60 [2022-01-31 19:37:08,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:37:08,213 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2022-01-31 19:37:08,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.12) internal successors, (56), 48 states have internal predecessors, (56), 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) [2022-01-31 19:37:08,213 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2022-01-31 19:37:08,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 19:37:08,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:37:08,213 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:37:08,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 19:37:08,214 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:37:08,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:37:08,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1322968841, now seen corresponding path program 10 times [2022-01-31 19:37:08,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:37:08,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269671601] [2022-01-31 19:37:08,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:37:08,215 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:37:08,215 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:37:08,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:37:08,216 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:37:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:08,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:37:08,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:08,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:37:08,321 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:37:08,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269671601] [2022-01-31 19:37:08,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [269671601] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:37:08,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:37:08,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 19:37:08,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138444404] [2022-01-31 19:37:08,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:37:08,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 19:37:08,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:37:08,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 19:37:08,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-01-31 19:37:08,322 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 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) [2022-01-31 19:37:08,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:37:08,581 INFO L93 Difference]: Finished difference Result 188 states and 205 transitions. [2022-01-31 19:37:08,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 19:37:08,581 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 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 62 [2022-01-31 19:37:08,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:37:08,582 INFO L225 Difference]: With dead ends: 188 [2022-01-31 19:37:08,582 INFO L226 Difference]: Without dead ends: 111 [2022-01-31 19:37:08,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-01-31 19:37:08,584 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 114 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:37:08,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 43 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:37:08,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-31 19:37:08,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99. [2022-01-31 19:37:08,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 94 states have internal predecessors, (102), 3 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) [2022-01-31 19:37:08,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 106 transitions. [2022-01-31 19:37:08,602 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 106 transitions. Word has length 62 [2022-01-31 19:37:08,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:37:08,602 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 106 transitions. [2022-01-31 19:37:08,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 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) [2022-01-31 19:37:08,602 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 106 transitions. [2022-01-31 19:37:08,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 19:37:08,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:37:08,603 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:37:08,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 19:37:08,603 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:37:08,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:37:08,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1842227319, now seen corresponding path program 11 times [2022-01-31 19:37:08,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:37:08,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524191103] [2022-01-31 19:37:08,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:37:08,604 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:37:08,604 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:37:08,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:37:08,605 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:37:08,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:08,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:37:08,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:08,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:37:08,705 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:37:08,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524191103] [2022-01-31 19:37:08,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1524191103] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:37:08,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:37:08,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 19:37:08,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736696027] [2022-01-31 19:37:08,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:37:08,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 19:37:08,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:37:08,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 19:37:08,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-31 19:37:08,706 INFO L87 Difference]: Start difference. First operand 99 states and 106 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 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) [2022-01-31 19:37:08,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:37:08,957 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2022-01-31 19:37:08,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 19:37:08,958 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 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 62 [2022-01-31 19:37:08,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:37:08,958 INFO L225 Difference]: With dead ends: 106 [2022-01-31 19:37:08,958 INFO L226 Difference]: Without dead ends: 71 [2022-01-31 19:37:08,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:37:08,959 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 126 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:37:08,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 51 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:37:08,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-31 19:37:08,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-01-31 19:37:08,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 66 states have internal predecessors, (71), 3 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) [2022-01-31 19:37:08,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2022-01-31 19:37:08,970 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 62 [2022-01-31 19:37:08,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:37:08,970 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2022-01-31 19:37:08,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 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) [2022-01-31 19:37:08,970 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2022-01-31 19:37:08,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 19:37:08,970 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:37:08,970 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:37:08,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 19:37:08,970 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:37:08,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:37:08,971 INFO L85 PathProgramCache]: Analyzing trace with hash -579202175, now seen corresponding path program 12 times [2022-01-31 19:37:08,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:37:08,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118939948] [2022-01-31 19:37:08,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:37:08,972 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:37:08,972 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:37:08,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:37:08,973 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:37:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:12,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:37:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:12,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:37:12,210 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:37:12,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118939948] [2022-01-31 19:37:12,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1118939948] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:37:12,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:37:12,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 19:37:12,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861372092] [2022-01-31 19:37:12,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:37:12,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 19:37:12,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:37:12,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 19:37:12,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=3163, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 19:37:12,212 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 59 states, 59 states have (on average 1.11864406779661) internal successors, (66), 57 states have internal predecessors, (66), 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) [2022-01-31 19:37:16,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:37:16,684 INFO L93 Difference]: Finished difference Result 122 states and 131 transitions. [2022-01-31 19:37:16,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 19:37:16,684 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.11864406779661) internal successors, (66), 57 states have internal predecessors, (66), 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 70 [2022-01-31 19:37:16,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:37:16,685 INFO L225 Difference]: With dead ends: 122 [2022-01-31 19:37:16,686 INFO L226 Difference]: Without dead ends: 117 [2022-01-31 19:37:16,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2661 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=866, Invalid=10264, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 19:37:16,688 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 1736 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:37:16,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 163 Invalid, 1897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1736 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 19:37:16,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-01-31 19:37:16,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 100. [2022-01-31 19:37:16,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 95 states have internal predecessors, (103), 3 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) [2022-01-31 19:37:16,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2022-01-31 19:37:16,709 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 70 [2022-01-31 19:37:16,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:37:16,710 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2022-01-31 19:37:16,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.11864406779661) internal successors, (66), 57 states have internal predecessors, (66), 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) [2022-01-31 19:37:16,710 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2022-01-31 19:37:16,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 19:37:16,710 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:37:16,710 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:37:16,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 19:37:16,711 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:37:16,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:37:16,711 INFO L85 PathProgramCache]: Analyzing trace with hash 2086439903, now seen corresponding path program 13 times [2022-01-31 19:37:16,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:37:16,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215540212] [2022-01-31 19:37:16,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:37:16,714 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:37:16,714 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:37:16,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:37:16,714 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:37:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:16,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:37:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:37:16,833 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:37:16,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215540212] [2022-01-31 19:37:16,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [215540212] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:37:16,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:37:16,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 19:37:16,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565894815] [2022-01-31 19:37:16,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:37:16,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 19:37:16,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:37:16,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 19:37:16,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:37:16,834 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 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) [2022-01-31 19:37:17,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:37:17,108 INFO L93 Difference]: Finished difference Result 206 states and 222 transitions. [2022-01-31 19:37:17,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 19:37:17,108 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 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 72 [2022-01-31 19:37:17,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:37:17,109 INFO L225 Difference]: With dead ends: 206 [2022-01-31 19:37:17,109 INFO L226 Difference]: Without dead ends: 115 [2022-01-31 19:37:17,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:37:17,110 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 181 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:37:17,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 33 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:37:17,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-31 19:37:17,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 103. [2022-01-31 19:37:17,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.0714285714285714) internal successors, (105), 98 states have internal predecessors, (105), 3 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) [2022-01-31 19:37:17,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 109 transitions. [2022-01-31 19:37:17,130 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 109 transitions. Word has length 72 [2022-01-31 19:37:17,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:37:17,130 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 109 transitions. [2022-01-31 19:37:17,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 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) [2022-01-31 19:37:17,130 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 109 transitions. [2022-01-31 19:37:17,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 19:37:17,131 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:37:17,131 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:37:17,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 19:37:17,131 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:37:17,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:37:17,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1614957187, now seen corresponding path program 14 times [2022-01-31 19:37:17,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:37:17,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913635301] [2022-01-31 19:37:17,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:37:17,135 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:37:17,135 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:37:17,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:37:17,136 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:37:17,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:17,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:37:17,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:17,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:37:17,266 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:37:17,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913635301] [2022-01-31 19:37:17,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [913635301] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:37:17,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:37:17,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 19:37:17,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473245984] [2022-01-31 19:37:17,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:37:17,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 19:37:17,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:37:17,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 19:37:17,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:37:17,268 INFO L87 Difference]: Start difference. First operand 103 states and 109 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 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) [2022-01-31 19:37:17,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:37:17,563 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2022-01-31 19:37:17,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 19:37:17,564 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 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 74 [2022-01-31 19:37:17,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:37:17,564 INFO L225 Difference]: With dead ends: 110 [2022-01-31 19:37:17,564 INFO L226 Difference]: Without dead ends: 81 [2022-01-31 19:37:17,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:37:17,565 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 110 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:37:17,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 57 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:37:17,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-01-31 19:37:17,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-01-31 19:37:17,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 76 states have internal predecessors, (81), 3 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) [2022-01-31 19:37:17,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2022-01-31 19:37:17,582 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 74 [2022-01-31 19:37:17,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:37:17,583 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2022-01-31 19:37:17,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 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) [2022-01-31 19:37:17,583 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2022-01-31 19:37:17,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 19:37:17,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:37:17,583 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:37:17,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 19:37:17,583 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:37:17,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:37:17,583 INFO L85 PathProgramCache]: Analyzing trace with hash 774402647, now seen corresponding path program 15 times [2022-01-31 19:37:17,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:37:17,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122792149] [2022-01-31 19:37:17,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:37:17,585 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:37:17,585 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:37:17,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:37:17,586 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:37:17,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:22,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:37:22,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:37:22,074 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:37:22,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122792149] [2022-01-31 19:37:22,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2122792149] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:37:22,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:37:22,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 19:37:22,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978935447] [2022-01-31 19:37:22,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:37:22,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 19:37:22,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:37:22,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 19:37:22,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=4286, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 19:37:22,076 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 69 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 67 states have internal predecessors, (76), 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) [2022-01-31 19:37:27,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:37:27,681 INFO L93 Difference]: Finished difference Result 138 states and 147 transitions. [2022-01-31 19:37:27,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 19:37:27,682 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 67 states have internal predecessors, (76), 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 80 [2022-01-31 19:37:27,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:37:27,683 INFO L225 Difference]: With dead ends: 138 [2022-01-31 19:37:27,683 INFO L226 Difference]: Without dead ends: 133 [2022-01-31 19:37:27,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3311 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1218, Invalid=11892, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 19:37:27,686 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 2187 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 2410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 2187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:37:27,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 184 Invalid, 2410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 2187 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 19:37:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-01-31 19:37:27,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 114. [2022-01-31 19:37:27,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.073394495412844) internal successors, (117), 109 states have internal predecessors, (117), 3 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) [2022-01-31 19:37:27,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 121 transitions. [2022-01-31 19:37:27,714 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 121 transitions. Word has length 80 [2022-01-31 19:37:27,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:37:27,714 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 121 transitions. [2022-01-31 19:37:27,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 67 states have internal predecessors, (76), 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) [2022-01-31 19:37:27,715 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 121 transitions. [2022-01-31 19:37:27,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 19:37:27,715 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:37:27,715 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:37:27,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 19:37:27,715 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:37:27,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:37:27,716 INFO L85 PathProgramCache]: Analyzing trace with hash 509697333, now seen corresponding path program 16 times [2022-01-31 19:37:27,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:37:27,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077787724] [2022-01-31 19:37:27,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:37:27,717 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:37:27,717 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:37:27,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:37:27,718 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:37:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:27,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:37:27,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:37:27,852 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:37:27,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077787724] [2022-01-31 19:37:27,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1077787724] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:37:27,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:37:27,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 19:37:27,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016356719] [2022-01-31 19:37:27,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:37:27,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 19:37:27,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:37:27,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 19:37:27,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:37:27,853 INFO L87 Difference]: Start difference. First operand 114 states and 121 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 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) [2022-01-31 19:37:28,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:37:28,145 INFO L93 Difference]: Finished difference Result 234 states and 250 transitions. [2022-01-31 19:37:28,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 19:37:28,145 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 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 82 [2022-01-31 19:37:28,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:37:28,146 INFO L225 Difference]: With dead ends: 234 [2022-01-31 19:37:28,146 INFO L226 Difference]: Without dead ends: 129 [2022-01-31 19:37:28,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2022-01-31 19:37:28,147 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 180 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:37:28,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 45 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:37:28,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-31 19:37:28,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 117. [2022-01-31 19:37:28,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0625) internal successors, (119), 112 states have internal predecessors, (119), 3 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) [2022-01-31 19:37:28,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 123 transitions. [2022-01-31 19:37:28,177 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 123 transitions. Word has length 82 [2022-01-31 19:37:28,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:37:28,177 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 123 transitions. [2022-01-31 19:37:28,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 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) [2022-01-31 19:37:28,177 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 123 transitions. [2022-01-31 19:37:28,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 19:37:28,177 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:37:28,177 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:37:28,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 19:37:28,177 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:37:28,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:37:28,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1977370285, now seen corresponding path program 17 times [2022-01-31 19:37:28,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:37:28,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766996411] [2022-01-31 19:37:28,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:37:28,179 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:37:28,179 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:37:28,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:37:28,180 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:37:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:28,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:37:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:37:28,303 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:37:28,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766996411] [2022-01-31 19:37:28,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [766996411] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:37:28,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:37:28,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 19:37:28,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334166198] [2022-01-31 19:37:28,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:37:28,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 19:37:28,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:37:28,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 19:37:28,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:37:28,304 INFO L87 Difference]: Start difference. First operand 117 states and 123 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 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) [2022-01-31 19:37:28,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:37:28,658 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2022-01-31 19:37:28,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 19:37:28,659 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 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 84 [2022-01-31 19:37:28,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:37:28,659 INFO L225 Difference]: With dead ends: 124 [2022-01-31 19:37:28,659 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 19:37:28,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:37:28,660 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 158 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:37:28,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 51 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:37:28,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 19:37:28,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-01-31 19:37:28,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.058139534883721) internal successors, (91), 86 states have internal predecessors, (91), 3 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) [2022-01-31 19:37:28,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2022-01-31 19:37:28,684 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 84 [2022-01-31 19:37:28,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:37:28,684 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2022-01-31 19:37:28,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 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) [2022-01-31 19:37:28,684 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2022-01-31 19:37:28,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-31 19:37:28,686 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:37:28,686 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:37:28,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 19:37:28,687 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:37:28,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:37:28,687 INFO L85 PathProgramCache]: Analyzing trace with hash -19300947, now seen corresponding path program 18 times [2022-01-31 19:37:28,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:37:28,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515359701] [2022-01-31 19:37:28,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:37:28,688 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:37:28,688 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:37:28,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:37:28,689 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:37:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:34,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:37:34,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:34,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:37:34,189 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:37:34,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515359701] [2022-01-31 19:37:34,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [515359701] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:37:34,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:37:34,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 19:37:34,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683599291] [2022-01-31 19:37:34,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:37:34,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 19:37:34,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:37:34,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 19:37:34,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=5571, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 19:37:34,193 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 78 states, 78 states have (on average 1.1025641025641026) internal successors, (86), 76 states have internal predecessors, (86), 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) [2022-01-31 19:37:42,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:37:42,075 INFO L93 Difference]: Finished difference Result 154 states and 163 transitions. [2022-01-31 19:37:42,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 19:37:42,077 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.1025641025641026) internal successors, (86), 76 states have internal predecessors, (86), 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 90 [2022-01-31 19:37:42,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:37:42,078 INFO L225 Difference]: With dead ends: 154 [2022-01-31 19:37:42,078 INFO L226 Difference]: Without dead ends: 149 [2022-01-31 19:37:42,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4617 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1455, Invalid=17451, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 19:37:42,080 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 3400 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 3577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 3400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:37:42,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 247 Invalid, 3577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 3400 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 19:37:42,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-01-31 19:37:42,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 128. [2022-01-31 19:37:42,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.065040650406504) internal successors, (131), 123 states have internal predecessors, (131), 3 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) [2022-01-31 19:37:42,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 135 transitions. [2022-01-31 19:37:42,149 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 135 transitions. Word has length 90 [2022-01-31 19:37:42,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:37:42,150 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 135 transitions. [2022-01-31 19:37:42,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.1025641025641026) internal successors, (86), 76 states have internal predecessors, (86), 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) [2022-01-31 19:37:42,150 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 135 transitions. [2022-01-31 19:37:42,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 19:37:42,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:37:42,151 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:37:42,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 19:37:42,152 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:37:42,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:37:42,152 INFO L85 PathProgramCache]: Analyzing trace with hash -687621365, now seen corresponding path program 19 times [2022-01-31 19:37:42,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:37:42,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766929249] [2022-01-31 19:37:42,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:37:42,161 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:37:42,161 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:37:42,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:37:42,163 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:37:42,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:42,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:37:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:42,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:37:42,325 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:37:42,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766929249] [2022-01-31 19:37:42,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1766929249] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:37:42,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:37:42,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 19:37:42,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821708038] [2022-01-31 19:37:42,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:37:42,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 19:37:42,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:37:42,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 19:37:42,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:37:42,326 INFO L87 Difference]: Start difference. First operand 128 states and 135 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 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) [2022-01-31 19:37:42,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:37:42,733 INFO L93 Difference]: Finished difference Result 262 states and 278 transitions. [2022-01-31 19:37:42,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 19:37:42,733 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 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 92 [2022-01-31 19:37:42,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:37:42,734 INFO L225 Difference]: With dead ends: 262 [2022-01-31 19:37:42,734 INFO L226 Difference]: Without dead ends: 143 [2022-01-31 19:37:42,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:37:42,735 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 188 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:37:42,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 51 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:37:42,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-31 19:37:42,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 131. [2022-01-31 19:37:42,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0555555555555556) internal successors, (133), 126 states have internal predecessors, (133), 3 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) [2022-01-31 19:37:42,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 137 transitions. [2022-01-31 19:37:42,776 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 137 transitions. Word has length 92 [2022-01-31 19:37:42,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:37:42,776 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 137 transitions. [2022-01-31 19:37:42,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 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) [2022-01-31 19:37:42,777 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 137 transitions. [2022-01-31 19:37:42,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-31 19:37:42,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:37:42,777 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:37:42,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 19:37:42,777 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:37:42,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:37:42,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1595025833, now seen corresponding path program 20 times [2022-01-31 19:37:42,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:37:42,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269038603] [2022-01-31 19:37:42,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:37:42,779 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:37:42,779 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:37:42,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:37:42,780 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:37:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:42,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:37:42,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:42,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:37:42,929 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:37:42,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269038603] [2022-01-31 19:37:42,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [269038603] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:37:42,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:37:42,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 19:37:42,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622644564] [2022-01-31 19:37:42,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:37:42,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 19:37:42,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:37:42,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 19:37:42,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:37:42,930 INFO L87 Difference]: Start difference. First operand 131 states and 137 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 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) [2022-01-31 19:37:43,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:37:43,404 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2022-01-31 19:37:43,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 19:37:43,406 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 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 94 [2022-01-31 19:37:43,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:37:43,406 INFO L225 Difference]: With dead ends: 138 [2022-01-31 19:37:43,406 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 19:37:43,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=267, Invalid=993, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:37:43,407 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 139 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:37:43,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 67 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:37:43,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 19:37:43,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-01-31 19:37:43,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 96 states have internal predecessors, (101), 3 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) [2022-01-31 19:37:43,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2022-01-31 19:37:43,450 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 94 [2022-01-31 19:37:43,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:37:43,450 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2022-01-31 19:37:43,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 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) [2022-01-31 19:37:43,450 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2022-01-31 19:37:43,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 19:37:43,451 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:37:43,451 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:37:43,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 19:37:43,451 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:37:43,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:37:43,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1212650883, now seen corresponding path program 21 times [2022-01-31 19:37:43,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:37:43,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648465443] [2022-01-31 19:37:43,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:37:43,453 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:37:43,453 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:37:43,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:37:43,466 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:37:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:50,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:37:50,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:50,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:37:50,662 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:37:50,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648465443] [2022-01-31 19:37:50,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1648465443] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:37:50,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:37:50,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 19:37:50,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064341055] [2022-01-31 19:37:50,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:37:50,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 19:37:50,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:37:50,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 19:37:50,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=7160, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 19:37:50,664 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 89 states, 89 states have (on average 1.0786516853932584) internal successors, (96), 87 states have internal predecessors, (96), 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) [2022-01-31 19:37:59,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:37:59,622 INFO L93 Difference]: Finished difference Result 165 states and 172 transitions. [2022-01-31 19:37:59,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 19:37:59,622 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.0786516853932584) internal successors, (96), 87 states have internal predecessors, (96), 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 100 [2022-01-31 19:37:59,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:37:59,623 INFO L225 Difference]: With dead ends: 165 [2022-01-31 19:37:59,623 INFO L226 Difference]: Without dead ends: 160 [2022-01-31 19:37:59,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6271 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=1881, Invalid=20469, Unknown=0, NotChecked=0, Total=22350 [2022-01-31 19:37:59,625 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 3781 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 4055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 3781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:37:59,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 316 Invalid, 4055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 3781 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 19:37:59,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-01-31 19:37:59,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 142. [2022-01-31 19:37:59,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0583941605839415) internal successors, (145), 137 states have internal predecessors, (145), 3 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) [2022-01-31 19:37:59,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 149 transitions. [2022-01-31 19:37:59,693 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 149 transitions. Word has length 100 [2022-01-31 19:37:59,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:37:59,693 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 149 transitions. [2022-01-31 19:37:59,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.0786516853932584) internal successors, (96), 87 states have internal predecessors, (96), 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) [2022-01-31 19:37:59,693 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 149 transitions. [2022-01-31 19:37:59,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 19:37:59,693 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:37:59,694 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:37:59,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 19:37:59,694 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:37:59,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:37:59,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1088816481, now seen corresponding path program 22 times [2022-01-31 19:37:59,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:37:59,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546641444] [2022-01-31 19:37:59,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:37:59,697 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:37:59,697 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:37:59,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:37:59,698 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:37:59,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:59,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:37:59,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:37:59,861 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:37:59,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546641444] [2022-01-31 19:37:59,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1546641444] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:37:59,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:37:59,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 19:37:59,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021955569] [2022-01-31 19:37:59,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:37:59,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 19:37:59,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:37:59,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 19:37:59,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:37:59,862 INFO L87 Difference]: Start difference. First operand 142 states and 149 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 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) [2022-01-31 19:38:00,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:38:00,300 INFO L93 Difference]: Finished difference Result 290 states and 306 transitions. [2022-01-31 19:38:00,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 19:38:00,300 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 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 102 [2022-01-31 19:38:00,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:38:00,301 INFO L225 Difference]: With dead ends: 290 [2022-01-31 19:38:00,301 INFO L226 Difference]: Without dead ends: 157 [2022-01-31 19:38:00,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2022-01-31 19:38:00,302 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 243 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:38:00,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 43 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:38:00,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-31 19:38:00,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 145. [2022-01-31 19:38:00,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.05) internal successors, (147), 140 states have internal predecessors, (147), 3 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) [2022-01-31 19:38:00,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 151 transitions. [2022-01-31 19:38:00,358 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 151 transitions. Word has length 102 [2022-01-31 19:38:00,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:38:00,359 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 151 transitions. [2022-01-31 19:38:00,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 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) [2022-01-31 19:38:00,359 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 151 transitions. [2022-01-31 19:38:00,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-31 19:38:00,361 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:38:00,361 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:38:00,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 19:38:00,362 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:38:00,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:38:00,362 INFO L85 PathProgramCache]: Analyzing trace with hash -351050113, now seen corresponding path program 23 times [2022-01-31 19:38:00,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:38:00,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503928518] [2022-01-31 19:38:00,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:38:00,363 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:38:00,363 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:38:00,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:38:00,364 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:38:00,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:00,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:38:00,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:00,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:38:00,531 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:38:00,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503928518] [2022-01-31 19:38:00,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1503928518] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:38:00,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:38:00,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 19:38:00,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296545125] [2022-01-31 19:38:00,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:38:00,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 19:38:00,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:38:00,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 19:38:00,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:38:00,533 INFO L87 Difference]: Start difference. First operand 145 states and 151 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 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) [2022-01-31 19:38:01,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:38:01,103 INFO L93 Difference]: Finished difference Result 152 states and 158 transitions. [2022-01-31 19:38:01,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 19:38:01,104 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 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 104 [2022-01-31 19:38:01,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:38:01,104 INFO L225 Difference]: With dead ends: 152 [2022-01-31 19:38:01,104 INFO L226 Difference]: Without dead ends: 111 [2022-01-31 19:38:01,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=330, Invalid=1230, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 19:38:01,105 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 196 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:38:01,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 51 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:38:01,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-31 19:38:01,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-01-31 19:38:01,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.0471698113207548) internal successors, (111), 106 states have internal predecessors, (111), 3 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) [2022-01-31 19:38:01,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2022-01-31 19:38:01,148 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 104 [2022-01-31 19:38:01,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:38:01,149 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2022-01-31 19:38:01,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 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) [2022-01-31 19:38:01,149 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2022-01-31 19:38:01,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 19:38:01,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:38:01,149 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:38:01,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 19:38:01,150 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:38:01,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:38:01,150 INFO L85 PathProgramCache]: Analyzing trace with hash 867506649, now seen corresponding path program 24 times [2022-01-31 19:38:01,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:38:01,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049210684] [2022-01-31 19:38:01,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:38:01,151 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:38:01,151 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:38:01,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:38:01,152 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:38:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:10,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:38:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:38:10,382 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:38:10,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049210684] [2022-01-31 19:38:10,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2049210684] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:38:10,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:38:10,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 19:38:10,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618363019] [2022-01-31 19:38:10,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:38:10,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 19:38:10,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:38:10,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 19:38:10,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=8884, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 19:38:10,407 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 98 states, 98 states have (on average 1.0816326530612246) internal successors, (106), 96 states have internal predecessors, (106), 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) [2022-01-31 19:38:24,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:38:24,256 INFO L93 Difference]: Finished difference Result 185 states and 194 transitions. [2022-01-31 19:38:24,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 19:38:24,257 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.0816326530612246) internal successors, (106), 96 states have internal predecessors, (106), 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 110 [2022-01-31 19:38:24,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:38:24,257 INFO L225 Difference]: With dead ends: 185 [2022-01-31 19:38:24,257 INFO L226 Difference]: Without dead ends: 180 [2022-01-31 19:38:24,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8485 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=2450, Invalid=31222, Unknown=0, NotChecked=0, Total=33672 [2022-01-31 19:38:24,259 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 27 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 3823 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 4118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 3823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:38:24,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 230 Invalid, 4118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 3823 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 19:38:24,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-01-31 19:38:24,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 156. [2022-01-31 19:38:24,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0529801324503312) internal successors, (159), 151 states have internal predecessors, (159), 3 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) [2022-01-31 19:38:24,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 163 transitions. [2022-01-31 19:38:24,353 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 163 transitions. Word has length 110 [2022-01-31 19:38:24,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:38:24,353 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 163 transitions. [2022-01-31 19:38:24,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.0816326530612246) internal successors, (106), 96 states have internal predecessors, (106), 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) [2022-01-31 19:38:24,353 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 163 transitions. [2022-01-31 19:38:24,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-31 19:38:24,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:38:24,354 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:38:24,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 19:38:24,355 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:38:24,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:38:24,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1697815607, now seen corresponding path program 25 times [2022-01-31 19:38:24,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:38:24,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622204672] [2022-01-31 19:38:24,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:38:24,357 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:38:24,357 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:38:24,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:38:24,359 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:38:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:24,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:38:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:38:24,516 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:38:24,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622204672] [2022-01-31 19:38:24,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [622204672] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:38:24,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:38:24,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:38:24,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972738569] [2022-01-31 19:38:24,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:38:24,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:38:24,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:38:24,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:38:24,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:38:24,517 INFO L87 Difference]: Start difference. First operand 156 states and 163 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 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) [2022-01-31 19:38:24,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:38:24,998 INFO L93 Difference]: Finished difference Result 318 states and 334 transitions. [2022-01-31 19:38:24,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 19:38:24,998 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 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 112 [2022-01-31 19:38:24,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:38:24,999 INFO L225 Difference]: With dead ends: 318 [2022-01-31 19:38:24,999 INFO L226 Difference]: Without dead ends: 171 [2022-01-31 19:38:24,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=258, Invalid=864, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 19:38:25,000 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 244 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:38:25,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 53 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:38:25,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-01-31 19:38:25,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 159. [2022-01-31 19:38:25,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.0454545454545454) internal successors, (161), 154 states have internal predecessors, (161), 3 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) [2022-01-31 19:38:25,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 165 transitions. [2022-01-31 19:38:25,091 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 165 transitions. Word has length 112 [2022-01-31 19:38:25,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:38:25,091 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 165 transitions. [2022-01-31 19:38:25,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 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) [2022-01-31 19:38:25,091 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 165 transitions. [2022-01-31 19:38:25,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-31 19:38:25,091 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:38:25,092 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:38:25,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 19:38:25,092 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:38:25,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:38:25,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1489383467, now seen corresponding path program 26 times [2022-01-31 19:38:25,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:38:25,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677570367] [2022-01-31 19:38:25,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:38:25,093 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:38:25,093 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:38:25,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:38:25,094 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:38:25,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:25,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:38:25,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:25,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:38:25,315 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:38:25,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677570367] [2022-01-31 19:38:25,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1677570367] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:38:25,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:38:25,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:38:25,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186112194] [2022-01-31 19:38:25,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:38:25,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:38:25,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:38:25,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:38:25,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:38:25,316 INFO L87 Difference]: Start difference. First operand 159 states and 165 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 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) [2022-01-31 19:38:25,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:38:25,899 INFO L93 Difference]: Finished difference Result 166 states and 172 transitions. [2022-01-31 19:38:25,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 19:38:25,899 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 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 114 [2022-01-31 19:38:25,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:38:25,900 INFO L225 Difference]: With dead ends: 166 [2022-01-31 19:38:25,900 INFO L226 Difference]: Without dead ends: 121 [2022-01-31 19:38:25,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=400, Invalid=1492, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 19:38:25,902 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 280 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:38:25,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 55 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:38:25,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-31 19:38:25,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-01-31 19:38:25,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.043103448275862) internal successors, (121), 116 states have internal predecessors, (121), 3 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) [2022-01-31 19:38:25,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2022-01-31 19:38:25,969 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 114 [2022-01-31 19:38:25,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:38:25,969 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2022-01-31 19:38:25,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 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) [2022-01-31 19:38:25,969 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2022-01-31 19:38:25,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-31 19:38:25,970 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:38:25,971 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:38:25,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 19:38:25,971 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:38:25,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:38:25,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1863554385, now seen corresponding path program 27 times [2022-01-31 19:38:25,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:38:25,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095098990] [2022-01-31 19:38:25,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:38:25,972 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:38:25,972 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:38:25,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:38:25,973 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:38:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:38,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:38:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:38,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:38:38,746 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:38:38,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095098990] [2022-01-31 19:38:38,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2095098990] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:38:38,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:38:38,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 19:38:38,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600600857] [2022-01-31 19:38:38,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:38:38,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 19:38:38,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:38:38,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 19:38:38,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=727, Invalid=10829, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 19:38:38,748 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand has 108 states, 108 states have (on average 1.0740740740740742) internal successors, (116), 106 states have internal predecessors, (116), 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) [2022-01-31 19:38:58,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:38:58,114 INFO L93 Difference]: Finished difference Result 201 states and 210 transitions. [2022-01-31 19:38:58,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 19:38:58,114 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.0740740740740742) internal successors, (116), 106 states have internal predecessors, (116), 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 120 [2022-01-31 19:38:58,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:38:58,115 INFO L225 Difference]: With dead ends: 201 [2022-01-31 19:38:58,115 INFO L226 Difference]: Without dead ends: 196 [2022-01-31 19:38:58,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10429 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=3002, Invalid=38410, Unknown=0, NotChecked=0, Total=41412 [2022-01-31 19:38:58,118 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 36 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 4650 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 5003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 4650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:38:58,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 255 Invalid, 5003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 4650 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-01-31 19:38:58,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-01-31 19:38:58,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 170. [2022-01-31 19:38:58,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.0484848484848486) internal successors, (173), 165 states have internal predecessors, (173), 3 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) [2022-01-31 19:38:58,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 177 transitions. [2022-01-31 19:38:58,219 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 177 transitions. Word has length 120 [2022-01-31 19:38:58,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:38:58,219 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 177 transitions. [2022-01-31 19:38:58,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.0740740740740742) internal successors, (116), 106 states have internal predecessors, (116), 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) [2022-01-31 19:38:58,220 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 177 transitions. [2022-01-31 19:38:58,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 19:38:58,220 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:38:58,220 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:38:58,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 19:38:58,220 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:38:58,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:38:58,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1315184755, now seen corresponding path program 28 times [2022-01-31 19:38:58,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:38:58,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550376402] [2022-01-31 19:38:58,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:38:58,222 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:38:58,222 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:38:58,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:38:58,223 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:38:58,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:58,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:38:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:58,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:38:58,437 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:38:58,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550376402] [2022-01-31 19:38:58,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1550376402] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:38:58,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:38:58,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 19:38:58,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444971498] [2022-01-31 19:38:58,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:38:58,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 19:38:58,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:38:58,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 19:38:58,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:38:58,438 INFO L87 Difference]: Start difference. First operand 170 states and 177 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 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) [2022-01-31 19:38:58,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:38:59,000 INFO L93 Difference]: Finished difference Result 346 states and 362 transitions. [2022-01-31 19:38:59,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 19:38:59,001 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 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 122 [2022-01-31 19:38:59,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:38:59,002 INFO L225 Difference]: With dead ends: 346 [2022-01-31 19:38:59,002 INFO L226 Difference]: Without dead ends: 185 [2022-01-31 19:38:59,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=305, Invalid=1027, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 19:38:59,003 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 328 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:38:59,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 47 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:38:59,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-01-31 19:38:59,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 173. [2022-01-31 19:38:59,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.0416666666666667) internal successors, (175), 168 states have internal predecessors, (175), 3 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) [2022-01-31 19:38:59,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 179 transitions. [2022-01-31 19:38:59,132 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 179 transitions. Word has length 122 [2022-01-31 19:38:59,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:38:59,132 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 179 transitions. [2022-01-31 19:38:59,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 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) [2022-01-31 19:38:59,132 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 179 transitions. [2022-01-31 19:38:59,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-31 19:38:59,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:38:59,133 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:38:59,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 19:38:59,133 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:38:59,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:38:59,133 INFO L85 PathProgramCache]: Analyzing trace with hash 790611371, now seen corresponding path program 29 times [2022-01-31 19:38:59,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:38:59,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600205672] [2022-01-31 19:38:59,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:38:59,135 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:38:59,135 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:38:59,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:38:59,135 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:38:59,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:59,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:38:59,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:59,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:38:59,375 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:38:59,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600205672] [2022-01-31 19:38:59,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1600205672] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:38:59,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:38:59,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 19:38:59,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61593566] [2022-01-31 19:38:59,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:38:59,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 19:38:59,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:38:59,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 19:38:59,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:38:59,376 INFO L87 Difference]: Start difference. First operand 173 states and 179 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 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) [2022-01-31 19:39:00,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:39:00,090 INFO L93 Difference]: Finished difference Result 180 states and 186 transitions. [2022-01-31 19:39:00,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 19:39:00,091 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 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 124 [2022-01-31 19:39:00,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:39:00,091 INFO L225 Difference]: With dead ends: 180 [2022-01-31 19:39:00,091 INFO L226 Difference]: Without dead ends: 131 [2022-01-31 19:39:00,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=477, Invalid=1779, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 19:39:00,093 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 234 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:39:00,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 59 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:39:00,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-31 19:39:00,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-01-31 19:39:00,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0396825396825398) internal successors, (131), 126 states have internal predecessors, (131), 3 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) [2022-01-31 19:39:00,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2022-01-31 19:39:00,173 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 124 [2022-01-31 19:39:00,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:39:00,173 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2022-01-31 19:39:00,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 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) [2022-01-31 19:39:00,173 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2022-01-31 19:39:00,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-01-31 19:39:00,174 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:39:00,174 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:39:00,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 19:39:00,174 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:39:00,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:39:00,174 INFO L85 PathProgramCache]: Analyzing trace with hash -868227067, now seen corresponding path program 30 times [2022-01-31 19:39:00,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:39:00,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544182345] [2022-01-31 19:39:00,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:39:00,175 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:39:00,175 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:39:00,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:39:00,176 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:39:00,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:14,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:39:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:14,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:39:14,575 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:39:14,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544182345] [2022-01-31 19:39:14,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1544182345] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:39:14,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:39:14,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 19:39:14,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690988689] [2022-01-31 19:39:14,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:39:14,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 19:39:14,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:39:14,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 19:39:14,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=956, Invalid=12850, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 19:39:14,578 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand has 118 states, 118 states have (on average 1.0677966101694916) internal successors, (126), 116 states have internal predecessors, (126), 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) [2022-01-31 19:39:36,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:39:36,082 INFO L93 Difference]: Finished difference Result 218 states and 227 transitions. [2022-01-31 19:39:36,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 19:39:36,083 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.0677966101694916) internal successors, (126), 116 states have internal predecessors, (126), 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 130 [2022-01-31 19:39:36,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:39:36,084 INFO L225 Difference]: With dead ends: 218 [2022-01-31 19:39:36,084 INFO L226 Difference]: Without dead ends: 213 [2022-01-31 19:39:36,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12553 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=3686, Invalid=44934, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 19:39:36,087 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 5021 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 5445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 5021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:39:36,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 249 Invalid, 5445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 5021 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-01-31 19:39:36,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-01-31 19:39:36,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 184. [2022-01-31 19:39:36,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.0446927374301676) internal successors, (187), 179 states have internal predecessors, (187), 3 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) [2022-01-31 19:39:36,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 191 transitions. [2022-01-31 19:39:36,220 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 191 transitions. Word has length 130 [2022-01-31 19:39:36,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:39:36,220 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 191 transitions. [2022-01-31 19:39:36,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.0677966101694916) internal successors, (126), 116 states have internal predecessors, (126), 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) [2022-01-31 19:39:36,220 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 191 transitions. [2022-01-31 19:39:36,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-31 19:39:36,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:39:36,221 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:39:36,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 19:39:36,221 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:39:36,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:39:36,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1851535203, now seen corresponding path program 31 times [2022-01-31 19:39:36,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:39:36,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99176579] [2022-01-31 19:39:36,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:39:36,223 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:39:36,223 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:39:36,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:39:36,227 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:39:36,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:36,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:39:36,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:36,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:39:36,534 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:39:36,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99176579] [2022-01-31 19:39:36,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [99176579] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:39:36,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:39:36,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 19:39:36,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702542329] [2022-01-31 19:39:36,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:39:36,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 19:39:36,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:39:36,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 19:39:36,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:39:36,535 INFO L87 Difference]: Start difference. First operand 184 states and 191 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 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) [2022-01-31 19:39:37,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:39:37,214 INFO L93 Difference]: Finished difference Result 374 states and 390 transitions. [2022-01-31 19:39:37,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 19:39:37,214 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 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 132 [2022-01-31 19:39:37,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:39:37,215 INFO L225 Difference]: With dead ends: 374 [2022-01-31 19:39:37,215 INFO L226 Difference]: Without dead ends: 199 [2022-01-31 19:39:37,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=356, Invalid=1204, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 19:39:37,216 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 331 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:39:37,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 45 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:39:37,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-01-31 19:39:37,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 187. [2022-01-31 19:39:37,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.0384615384615385) internal successors, (189), 182 states have internal predecessors, (189), 3 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) [2022-01-31 19:39:37,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 193 transitions. [2022-01-31 19:39:37,357 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 193 transitions. Word has length 132 [2022-01-31 19:39:37,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:39:37,357 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 193 transitions. [2022-01-31 19:39:37,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 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) [2022-01-31 19:39:37,357 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 193 transitions. [2022-01-31 19:39:37,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-31 19:39:37,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:39:37,358 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:39:37,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 19:39:37,358 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:39:37,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:39:37,359 INFO L85 PathProgramCache]: Analyzing trace with hash 921151489, now seen corresponding path program 32 times [2022-01-31 19:39:37,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:39:37,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541294781] [2022-01-31 19:39:37,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:39:37,360 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:39:37,360 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:39:37,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:39:37,361 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:39:37,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:37,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:39:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:37,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:39:37,628 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:39:37,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541294781] [2022-01-31 19:39:37,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [541294781] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:39:37,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:39:37,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 19:39:37,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956597314] [2022-01-31 19:39:37,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:39:37,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 19:39:37,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:39:37,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 19:39:37,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:39:37,629 INFO L87 Difference]: Start difference. First operand 187 states and 193 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 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) [2022-01-31 19:39:38,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:39:38,396 INFO L93 Difference]: Finished difference Result 194 states and 200 transitions. [2022-01-31 19:39:38,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 19:39:38,396 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 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 134 [2022-01-31 19:39:38,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:39:38,397 INFO L225 Difference]: With dead ends: 194 [2022-01-31 19:39:38,397 INFO L226 Difference]: Without dead ends: 141 [2022-01-31 19:39:38,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=2091, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 19:39:38,398 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 262 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:39:38,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 51 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:39:38,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-31 19:39:38,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-01-31 19:39:38,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.036764705882353) internal successors, (141), 136 states have internal predecessors, (141), 3 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) [2022-01-31 19:39:38,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 145 transitions. [2022-01-31 19:39:38,488 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 145 transitions. Word has length 134 [2022-01-31 19:39:38,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:39:38,488 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 145 transitions. [2022-01-31 19:39:38,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 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) [2022-01-31 19:39:38,488 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 145 transitions. [2022-01-31 19:39:38,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-31 19:39:38,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:39:38,489 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:39:38,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 19:39:38,489 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:39:38,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:39:38,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1686761947, now seen corresponding path program 33 times [2022-01-31 19:39:38,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:39:38,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164319380] [2022-01-31 19:39:38,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:39:38,490 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:39:38,491 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:39:38,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:39:38,491 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:39:38,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:56,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:39:56,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:56,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:39:56,467 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:39:56,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164319380] [2022-01-31 19:39:56,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1164319380] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:39:56,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:39:56,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 19:39:56,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226721839] [2022-01-31 19:39:56,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:39:56,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 19:39:56,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:39:56,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 19:39:56,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1463, Invalid=14793, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 19:39:56,471 INFO L87 Difference]: Start difference. First operand 141 states and 145 transitions. Second operand has 128 states, 128 states have (on average 1.0625) internal successors, (136), 126 states have internal predecessors, (136), 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) [2022-01-31 19:40:13,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:13,237 INFO L93 Difference]: Finished difference Result 231 states and 239 transitions. [2022-01-31 19:40:13,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-31 19:40:13,238 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.0625) internal successors, (136), 126 states have internal predecessors, (136), 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 140 [2022-01-31 19:40:13,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:13,239 INFO L225 Difference]: With dead ends: 231 [2022-01-31 19:40:13,239 INFO L226 Difference]: Without dead ends: 226 [2022-01-31 19:40:13,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10791 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=2439, Invalid=32717, Unknown=0, NotChecked=0, Total=35156 [2022-01-31 19:40:13,241 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 31 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 5965 mSolverCounterSat, 354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 6319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 5965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:13,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 352 Invalid, 6319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [354 Valid, 5965 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-01-31 19:40:13,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-01-31 19:40:13,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 198. [2022-01-31 19:40:13,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.0414507772020725) internal successors, (201), 193 states have internal predecessors, (201), 3 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) [2022-01-31 19:40:13,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 205 transitions. [2022-01-31 19:40:13,393 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 205 transitions. Word has length 140 [2022-01-31 19:40:13,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:13,393 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 205 transitions. [2022-01-31 19:40:13,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.0625) internal successors, (136), 126 states have internal predecessors, (136), 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) [2022-01-31 19:40:13,393 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 205 transitions. [2022-01-31 19:40:13,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-31 19:40:13,394 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:13,394 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:40:13,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 19:40:13,394 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:13,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:13,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1271534663, now seen corresponding path program 34 times [2022-01-31 19:40:13,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:13,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090794723] [2022-01-31 19:40:13,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:13,396 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:13,396 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:13,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:13,397 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:13,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:13,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:40:13,693 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:13,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090794723] [2022-01-31 19:40:13,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2090794723] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:13,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:13,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 19:40:13,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373866238] [2022-01-31 19:40:13,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:13,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 19:40:13,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:13,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 19:40:13,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:40:13,694 INFO L87 Difference]: Start difference. First operand 198 states and 205 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 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) [2022-01-31 19:40:14,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:14,512 INFO L93 Difference]: Finished difference Result 402 states and 418 transitions. [2022-01-31 19:40:14,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 19:40:14,512 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 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 142 [2022-01-31 19:40:14,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:14,513 INFO L225 Difference]: With dead ends: 402 [2022-01-31 19:40:14,513 INFO L226 Difference]: Without dead ends: 213 [2022-01-31 19:40:14,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=411, Invalid=1395, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 19:40:14,514 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 363 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:14,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 55 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:40:14,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-01-31 19:40:14,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 201. [2022-01-31 19:40:14,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.0357142857142858) internal successors, (203), 196 states have internal predecessors, (203), 3 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) [2022-01-31 19:40:14,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 207 transitions. [2022-01-31 19:40:14,668 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 207 transitions. Word has length 142 [2022-01-31 19:40:14,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:14,668 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 207 transitions. [2022-01-31 19:40:14,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 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) [2022-01-31 19:40:14,668 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 207 transitions. [2022-01-31 19:40:14,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-01-31 19:40:14,669 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:14,669 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:40:14,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 19:40:14,669 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:14,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:14,669 INFO L85 PathProgramCache]: Analyzing trace with hash 20698839, now seen corresponding path program 35 times [2022-01-31 19:40:14,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:14,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443064330] [2022-01-31 19:40:14,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:14,670 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:14,670 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:14,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:14,672 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:14,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:14,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:14,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:14,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:40:14,961 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:14,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443064330] [2022-01-31 19:40:14,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [443064330] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:14,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:14,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 19:40:14,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971074329] [2022-01-31 19:40:14,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:14,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 19:40:14,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:14,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 19:40:14,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:40:14,962 INFO L87 Difference]: Start difference. First operand 201 states and 207 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 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) [2022-01-31 19:40:15,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:15,766 INFO L93 Difference]: Finished difference Result 208 states and 214 transitions. [2022-01-31 19:40:15,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 19:40:15,766 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 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 144 [2022-01-31 19:40:15,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:15,767 INFO L225 Difference]: With dead ends: 208 [2022-01-31 19:40:15,767 INFO L226 Difference]: Without dead ends: 151 [2022-01-31 19:40:15,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=652, Invalid=2428, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 19:40:15,767 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 262 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:15,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 71 Invalid, 1430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:40:15,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-01-31 19:40:15,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-01-31 19:40:15,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0342465753424657) internal successors, (151), 146 states have internal predecessors, (151), 3 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) [2022-01-31 19:40:15,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 155 transitions. [2022-01-31 19:40:15,878 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 155 transitions. Word has length 144 [2022-01-31 19:40:15,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:15,879 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 155 transitions. [2022-01-31 19:40:15,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 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) [2022-01-31 19:40:15,879 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 155 transitions. [2022-01-31 19:40:15,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-31 19:40:15,879 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:15,879 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:40:15,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 19:40:15,879 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:15,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:15,880 INFO L85 PathProgramCache]: Analyzing trace with hash -517150671, now seen corresponding path program 36 times [2022-01-31 19:40:15,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:15,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991319857] [2022-01-31 19:40:15,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:15,881 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:15,881 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:15,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:15,882 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:36,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:36,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:40:36,425 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:36,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991319857] [2022-01-31 19:40:36,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1991319857] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:36,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:36,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-01-31 19:40:36,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868606881] [2022-01-31 19:40:36,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:36,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-01-31 19:40:36,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:36,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-01-31 19:40:36,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=17199, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 19:40:36,427 INFO L87 Difference]: Start difference. First operand 151 states and 155 transitions. Second operand has 137 states, 137 states have (on average 1.0656934306569343) internal successors, (146), 135 states have internal predecessors, (146), 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) [2022-01-31 19:41:01,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:41:01,340 INFO L93 Difference]: Finished difference Result 249 states and 258 transitions. [2022-01-31 19:41:01,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-01-31 19:41:01,340 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 1.0656934306569343) internal successors, (146), 135 states have internal predecessors, (146), 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 150 [2022-01-31 19:41:01,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:41:01,364 INFO L225 Difference]: With dead ends: 249 [2022-01-31 19:41:01,364 INFO L226 Difference]: Without dead ends: 244 [2022-01-31 19:41:01,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17734 ImplicationChecksByTransitivity, 33.5s TimeCoverageRelationStatistics Valid=5162, Invalid=56590, Unknown=0, NotChecked=0, Total=61752 [2022-01-31 19:41:01,367 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 6065 mSolverCounterSat, 452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 6517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 452 IncrementalHoareTripleChecker+Valid, 6065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:41:01,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 218 Invalid, 6517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [452 Valid, 6065 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-01-31 19:41:01,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-01-31 19:41:01,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 212. [2022-01-31 19:41:01,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.038647342995169) internal successors, (215), 207 states have internal predecessors, (215), 3 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) [2022-01-31 19:41:01,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 219 transitions. [2022-01-31 19:41:01,532 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 219 transitions. Word has length 150 [2022-01-31 19:41:01,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:41:01,532 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 219 transitions. [2022-01-31 19:41:01,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 1.0656934306569343) internal successors, (146), 135 states have internal predecessors, (146), 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) [2022-01-31 19:41:01,532 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 219 transitions. [2022-01-31 19:41:01,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-31 19:41:01,533 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:41:01,533 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:41:01,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 19:41:01,533 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:41:01,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:41:01,533 INFO L85 PathProgramCache]: Analyzing trace with hash -495750001, now seen corresponding path program 37 times [2022-01-31 19:41:01,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:41:01,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413193280] [2022-01-31 19:41:01,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:41:01,535 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:41:01,535 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:41:01,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:41:01,536 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:41:01,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:01,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:41:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:01,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:41:01,859 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:41:01,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413193280] [2022-01-31 19:41:01,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1413193280] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:41:01,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:41:01,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 19:41:01,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012843042] [2022-01-31 19:41:01,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:41:01,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 19:41:01,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:41:01,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 19:41:01,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:41:01,860 INFO L87 Difference]: Start difference. First operand 212 states and 219 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 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) [2022-01-31 19:41:02,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:41:02,765 INFO L93 Difference]: Finished difference Result 430 states and 446 transitions. [2022-01-31 19:41:02,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 19:41:02,766 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 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 152 [2022-01-31 19:41:02,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:41:02,766 INFO L225 Difference]: With dead ends: 430 [2022-01-31 19:41:02,767 INFO L226 Difference]: Without dead ends: 227 [2022-01-31 19:41:02,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=470, Invalid=1600, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 19:41:02,767 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 489 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:41:02,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 41 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:41:02,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-01-31 19:41:02,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 215. [2022-01-31 19:41:02,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.0333333333333334) internal successors, (217), 210 states have internal predecessors, (217), 3 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) [2022-01-31 19:41:02,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 221 transitions. [2022-01-31 19:41:02,943 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 221 transitions. Word has length 152 [2022-01-31 19:41:02,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:41:02,943 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 221 transitions. [2022-01-31 19:41:02,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 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) [2022-01-31 19:41:02,943 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 221 transitions. [2022-01-31 19:41:02,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-01-31 19:41:02,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:41:02,944 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:41:02,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 19:41:02,944 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:41:02,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:41:02,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1431220781, now seen corresponding path program 38 times [2022-01-31 19:41:02,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:41:02,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527950336] [2022-01-31 19:41:02,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:41:02,946 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:41:02,946 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:41:02,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:41:02,947 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:41:02,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:03,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:41:03,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:41:03,260 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:41:03,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527950336] [2022-01-31 19:41:03,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [527950336] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:41:03,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:41:03,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 19:41:03,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813170732] [2022-01-31 19:41:03,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:41:03,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 19:41:03,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:41:03,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 19:41:03,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:41:03,270 INFO L87 Difference]: Start difference. First operand 215 states and 221 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 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) [2022-01-31 19:41:04,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:41:04,125 INFO L93 Difference]: Finished difference Result 222 states and 228 transitions. [2022-01-31 19:41:04,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 19:41:04,126 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 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 154 [2022-01-31 19:41:04,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:41:04,126 INFO L225 Difference]: With dead ends: 222 [2022-01-31 19:41:04,126 INFO L226 Difference]: Without dead ends: 161 [2022-01-31 19:41:04,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=750, Invalid=2790, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 19:41:04,127 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 314 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:41:04,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 55 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:41:04,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-01-31 19:41:04,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-01-31 19:41:04,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0320512820512822) internal successors, (161), 156 states have internal predecessors, (161), 3 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) [2022-01-31 19:41:04,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 165 transitions. [2022-01-31 19:41:04,252 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 165 transitions. Word has length 154 [2022-01-31 19:41:04,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:41:04,252 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 165 transitions. [2022-01-31 19:41:04,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 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) [2022-01-31 19:41:04,252 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 165 transitions. [2022-01-31 19:41:04,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-31 19:41:04,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:41:04,252 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:41:04,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 19:41:04,253 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:41:04,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:41:04,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1209215751, now seen corresponding path program 39 times [2022-01-31 19:41:04,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:41:04,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657950288] [2022-01-31 19:41:04,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:41:04,254 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:41:04,254 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:41:04,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:41:04,255 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:41:04,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:29,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:41:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:29,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:41:29,395 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:41:29,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657950288] [2022-01-31 19:41:29,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1657950288] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:41:29,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:41:29,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [146] imperfect sequences [] total 146 [2022-01-31 19:41:29,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412419217] [2022-01-31 19:41:29,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:41:29,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-01-31 19:41:29,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:41:29,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-01-31 19:41:29,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1528, Invalid=19642, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 19:41:29,397 INFO L87 Difference]: Start difference. First operand 161 states and 165 transitions. Second operand has 146 states, 146 states have (on average 1.0684931506849316) internal successors, (156), 144 states have internal predecessors, (156), 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) [2022-01-31 19:42:01,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:42:01,243 INFO L93 Difference]: Finished difference Result 265 states and 274 transitions. [2022-01-31 19:42:01,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-01-31 19:42:01,244 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 1.0684931506849316) internal successors, (156), 144 states have internal predecessors, (156), 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 160 [2022-01-31 19:42:01,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:42:01,244 INFO L225 Difference]: With dead ends: 265 [2022-01-31 19:42:01,244 INFO L226 Difference]: Without dead ends: 260 [2022-01-31 19:42:01,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20246 ImplicationChecksByTransitivity, 43.1s TimeCoverageRelationStatistics Valid=5856, Invalid=66236, Unknown=0, NotChecked=0, Total=72092 [2022-01-31 19:42:01,247 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 50 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 6591 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 7174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 6591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:42:01,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 212 Invalid, 7174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 6591 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-01-31 19:42:01,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-01-31 19:42:01,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 226. [2022-01-31 19:42:01,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 221 states have (on average 1.0361990950226245) internal successors, (229), 221 states have internal predecessors, (229), 3 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) [2022-01-31 19:42:01,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 233 transitions. [2022-01-31 19:42:01,453 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 233 transitions. Word has length 160 [2022-01-31 19:42:01,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:42:01,453 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 233 transitions. [2022-01-31 19:42:01,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 1.0684931506849316) internal successors, (156), 144 states have internal predecessors, (156), 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) [2022-01-31 19:42:01,454 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 233 transitions. [2022-01-31 19:42:01,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-31 19:42:01,454 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:42:01,454 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:42:01,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 19:42:01,454 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:42:01,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:42:01,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1796789787, now seen corresponding path program 40 times [2022-01-31 19:42:01,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:42:01,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923330689] [2022-01-31 19:42:01,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:42:01,456 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:42:01,456 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:42:01,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:42:01,457 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:42:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:01,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:42:01,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:01,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:42:01,786 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:42:01,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923330689] [2022-01-31 19:42:01,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [923330689] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:42:01,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:42:01,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 19:42:01,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256396804] [2022-01-31 19:42:01,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:42:01,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 19:42:01,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:42:01,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 19:42:01,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=845, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 19:42:01,787 INFO L87 Difference]: Start difference. First operand 226 states and 233 transitions. Second operand has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 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) [2022-01-31 19:42:02,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:42:02,845 INFO L93 Difference]: Finished difference Result 458 states and 474 transitions. [2022-01-31 19:42:02,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 19:42:02,845 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 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 162 [2022-01-31 19:42:02,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:42:02,846 INFO L225 Difference]: With dead ends: 458 [2022-01-31 19:42:02,846 INFO L226 Difference]: Without dead ends: 241 [2022-01-31 19:42:02,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=533, Invalid=1819, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 19:42:02,847 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 492 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 502 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 502 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:42:02,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 45 Invalid, 1620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [502 Valid, 1118 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:42:02,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-01-31 19:42:03,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 229. [2022-01-31 19:42:03,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.03125) internal successors, (231), 224 states have internal predecessors, (231), 3 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) [2022-01-31 19:42:03,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 235 transitions. [2022-01-31 19:42:03,064 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 235 transitions. Word has length 162 [2022-01-31 19:42:03,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:42:03,064 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 235 transitions. [2022-01-31 19:42:03,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 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) [2022-01-31 19:42:03,064 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 235 transitions. [2022-01-31 19:42:03,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-01-31 19:42:03,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:42:03,064 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:42:03,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 19:42:03,065 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:42:03,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:42:03,065 INFO L85 PathProgramCache]: Analyzing trace with hash -187000317, now seen corresponding path program 41 times [2022-01-31 19:42:03,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:42:03,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462112486] [2022-01-31 19:42:03,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:42:03,066 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:42:03,066 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:42:03,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:42:03,067 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:42:03,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:03,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:42:03,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:03,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:42:03,404 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:42:03,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462112486] [2022-01-31 19:42:03,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1462112486] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:42:03,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:42:03,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 19:42:03,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926770210] [2022-01-31 19:42:03,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:42:03,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 19:42:03,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:42:03,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 19:42:03,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 19:42:03,405 INFO L87 Difference]: Start difference. First operand 229 states and 235 transitions. Second operand has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 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) [2022-01-31 19:42:04,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:42:04,236 INFO L93 Difference]: Finished difference Result 236 states and 242 transitions. [2022-01-31 19:42:04,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 19:42:04,237 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 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 164 [2022-01-31 19:42:04,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:42:04,237 INFO L225 Difference]: With dead ends: 236 [2022-01-31 19:42:04,237 INFO L226 Difference]: Without dead ends: 171 [2022-01-31 19:42:04,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=855, Invalid=3177, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 19:42:04,245 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 370 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:42:04,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 63 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 1469 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:42:04,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-01-31 19:42:04,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-01-31 19:42:04,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0301204819277108) internal successors, (171), 166 states have internal predecessors, (171), 3 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) [2022-01-31 19:42:04,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 175 transitions. [2022-01-31 19:42:04,420 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 175 transitions. Word has length 164 [2022-01-31 19:42:04,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:42:04,420 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 175 transitions. [2022-01-31 19:42:04,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 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) [2022-01-31 19:42:04,421 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 175 transitions. [2022-01-31 19:42:04,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-31 19:42:04,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:42:04,421 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:42:04,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 19:42:04,421 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:42:04,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:42:04,422 INFO L85 PathProgramCache]: Analyzing trace with hash 330242653, now seen corresponding path program 42 times [2022-01-31 19:42:04,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:42:04,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838643657] [2022-01-31 19:42:04,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:42:04,423 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:42:04,423 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:42:04,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:42:04,424 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:42:04,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:35,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:42:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:35,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:42:35,344 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:42:35,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838643657] [2022-01-31 19:42:35,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1838643657] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:42:35,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:42:35,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [157] imperfect sequences [] total 157 [2022-01-31 19:42:35,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202235663] [2022-01-31 19:42:35,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:42:35,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 157 states [2022-01-31 19:42:35,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:42:35,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2022-01-31 19:42:35,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1554, Invalid=22938, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 19:42:35,346 INFO L87 Difference]: Start difference. First operand 171 states and 175 transitions. Second operand has 157 states, 157 states have (on average 1.0573248407643312) internal successors, (166), 155 states have internal predecessors, (166), 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) [2022-01-31 19:43:15,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:43:15,924 INFO L93 Difference]: Finished difference Result 281 states and 290 transitions. [2022-01-31 19:43:15,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2022-01-31 19:43:15,925 INFO L78 Accepts]: Start accepts. Automaton has has 157 states, 157 states have (on average 1.0573248407643312) internal successors, (166), 155 states have internal predecessors, (166), 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 170 [2022-01-31 19:43:15,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:43:15,925 INFO L225 Difference]: With dead ends: 281 [2022-01-31 19:43:15,926 INFO L226 Difference]: Without dead ends: 276 [2022-01-31 19:43:15,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21605 ImplicationChecksByTransitivity, 53.8s TimeCoverageRelationStatistics Valid=6161, Invalid=75349, Unknown=0, NotChecked=0, Total=81510 [2022-01-31 19:43:15,929 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 36 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 8030 mSolverCounterSat, 516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 8546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 516 IncrementalHoareTripleChecker+Valid, 8030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:43:15,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 299 Invalid, 8546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [516 Valid, 8030 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-01-31 19:43:15,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-01-31 19:43:16,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 240. [2022-01-31 19:43:16,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.0340425531914894) internal successors, (243), 235 states have internal predecessors, (243), 3 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) [2022-01-31 19:43:16,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 247 transitions. [2022-01-31 19:43:16,200 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 247 transitions. Word has length 170 [2022-01-31 19:43:16,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:43:16,200 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 247 transitions. [2022-01-31 19:43:16,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 157 states, 157 states have (on average 1.0573248407643312) internal successors, (166), 155 states have internal predecessors, (166), 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) [2022-01-31 19:43:16,200 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 247 transitions. [2022-01-31 19:43:16,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-31 19:43:16,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:43:16,201 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:43:16,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 19:43:16,201 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:43:16,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:43:16,201 INFO L85 PathProgramCache]: Analyzing trace with hash 434858939, now seen corresponding path program 43 times [2022-01-31 19:43:16,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:43:16,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756466802] [2022-01-31 19:43:16,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:43:16,202 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:43:16,202 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:43:16,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:43:16,203 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:43:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:16,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:43:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:16,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:43:16,558 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:43:16,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756466802] [2022-01-31 19:43:16,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1756466802] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:43:16,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:43:16,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 19:43:16,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160631283] [2022-01-31 19:43:16,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:43:16,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 19:43:16,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:43:16,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 19:43:16,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:43:16,559 INFO L87 Difference]: Start difference. First operand 240 states and 247 transitions. Second operand has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 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) [2022-01-31 19:43:17,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:43:17,580 INFO L93 Difference]: Finished difference Result 486 states and 502 transitions. [2022-01-31 19:43:17,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 19:43:17,580 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 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 172 [2022-01-31 19:43:17,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:43:17,581 INFO L225 Difference]: With dead ends: 486 [2022-01-31 19:43:17,581 INFO L226 Difference]: Without dead ends: 255 [2022-01-31 19:43:17,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 19:43:17,582 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 520 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 542 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 542 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:43:17,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 43 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [542 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:43:17,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-01-31 19:43:17,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 243. [2022-01-31 19:43:17,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.0294117647058822) internal successors, (245), 238 states have internal predecessors, (245), 3 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) [2022-01-31 19:43:17,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 249 transitions. [2022-01-31 19:43:17,846 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 249 transitions. Word has length 172 [2022-01-31 19:43:17,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:43:17,847 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 249 transitions. [2022-01-31 19:43:17,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 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) [2022-01-31 19:43:17,847 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 249 transitions. [2022-01-31 19:43:17,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-31 19:43:17,847 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:43:17,847 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:43:17,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 19:43:17,848 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:43:17,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:43:17,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1843270055, now seen corresponding path program 44 times [2022-01-31 19:43:17,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:43:17,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615891001] [2022-01-31 19:43:17,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:43:17,849 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:43:17,849 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:43:17,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:43:17,850 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:43:17,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:18,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:43:18,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:18,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:43:18,232 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:43:18,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615891001] [2022-01-31 19:43:18,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1615891001] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:43:18,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:43:18,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 19:43:18,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866746175] [2022-01-31 19:43:18,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:43:18,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 19:43:18,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:43:18,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 19:43:18,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=964, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:43:18,233 INFO L87 Difference]: Start difference. First operand 243 states and 249 transitions. Second operand has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 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) [2022-01-31 19:43:19,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:43:19,231 INFO L93 Difference]: Finished difference Result 250 states and 256 transitions. [2022-01-31 19:43:19,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 19:43:19,231 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 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 174 [2022-01-31 19:43:19,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:43:19,232 INFO L225 Difference]: With dead ends: 250 [2022-01-31 19:43:19,232 INFO L226 Difference]: Without dead ends: 181 [2022-01-31 19:43:19,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=967, Invalid=3589, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 19:43:19,233 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 383 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:43:19,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 57 Invalid, 1663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [354 Valid, 1309 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:43:19,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-01-31 19:43:19,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2022-01-31 19:43:19,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0284090909090908) internal successors, (181), 176 states have internal predecessors, (181), 3 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) [2022-01-31 19:43:19,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 185 transitions. [2022-01-31 19:43:19,416 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 185 transitions. Word has length 174 [2022-01-31 19:43:19,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:43:19,416 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 185 transitions. [2022-01-31 19:43:19,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 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) [2022-01-31 19:43:19,416 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 185 transitions. [2022-01-31 19:43:19,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-01-31 19:43:19,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:43:19,417 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:43:19,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 19:43:19,417 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:43:19,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:43:19,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1459939789, now seen corresponding path program 45 times [2022-01-31 19:43:19,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:43:19,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550053973] [2022-01-31 19:43:19,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:43:19,418 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:43:19,418 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:43:19,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:43:19,419 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:43:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:50,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:43:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:50,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:43:50,360 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:43:50,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550053973] [2022-01-31 19:43:50,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [550053973] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:43:50,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:43:50,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [168] imperfect sequences [] total 168 [2022-01-31 19:43:50,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853324461] [2022-01-31 19:43:50,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:43:50,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 168 states [2022-01-31 19:43:50,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:43:50,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2022-01-31 19:43:50,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2332, Invalid=25724, Unknown=0, NotChecked=0, Total=28056 [2022-01-31 19:43:50,362 INFO L87 Difference]: Start difference. First operand 181 states and 185 transitions. Second operand has 168 states, 168 states have (on average 1.0476190476190477) internal successors, (176), 166 states have internal predecessors, (176), 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) [2022-01-31 19:44:29,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:44:29,116 INFO L93 Difference]: Finished difference Result 298 states and 307 transitions. [2022-01-31 19:44:29,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2022-01-31 19:44:29,116 INFO L78 Accepts]: Start accepts. Automaton has has 168 states, 168 states have (on average 1.0476190476190477) internal successors, (176), 166 states have internal predecessors, (176), 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 180 [2022-01-31 19:44:29,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:44:29,117 INFO L225 Difference]: With dead ends: 298 [2022-01-31 19:44:29,117 INFO L226 Difference]: Without dead ends: 293 [2022-01-31 19:44:29,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 294 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28107 ImplicationChecksByTransitivity, 49.6s TimeCoverageRelationStatistics Valid=6894, Invalid=80426, Unknown=0, NotChecked=0, Total=87320 [2022-01-31 19:44:29,120 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 36 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 10694 mSolverCounterSat, 631 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 11325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 631 IncrementalHoareTripleChecker+Valid, 10694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:44:29,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 383 Invalid, 11325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [631 Valid, 10694 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-01-31 19:44:29,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-01-31 19:44:29,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 254. [2022-01-31 19:44:29,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 249 states have (on average 1.0321285140562249) internal successors, (257), 249 states have internal predecessors, (257), 3 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) [2022-01-31 19:44:29,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 261 transitions. [2022-01-31 19:44:29,416 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 261 transitions. Word has length 180 [2022-01-31 19:44:29,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:44:29,416 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 261 transitions. [2022-01-31 19:44:29,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 168 states, 168 states have (on average 1.0476190476190477) internal successors, (176), 166 states have internal predecessors, (176), 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) [2022-01-31 19:44:29,417 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 261 transitions. [2022-01-31 19:44:29,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-31 19:44:29,417 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:44:29,417 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:44:29,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 19:44:29,417 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:44:29,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:44:29,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1751292433, now seen corresponding path program 46 times [2022-01-31 19:44:29,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:44:29,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174299949] [2022-01-31 19:44:29,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:44:29,419 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:44:29,419 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:44:29,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:44:29,420 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:44:29,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:29,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:29,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:29,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:44:29,785 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:29,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174299949] [2022-01-31 19:44:29,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [174299949] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:29,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:29,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 19:44:29,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093645806] [2022-01-31 19:44:29,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:29,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 19:44:29,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:29,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 19:44:29,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=1059, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 19:44:29,786 INFO L87 Difference]: Start difference. First operand 254 states and 261 transitions. Second operand has 38 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 37 states have internal predecessors, (88), 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) [2022-01-31 19:44:31,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:44:31,044 INFO L93 Difference]: Finished difference Result 514 states and 530 transitions. [2022-01-31 19:44:31,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 19:44:31,044 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 37 states have internal predecessors, (88), 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 182 [2022-01-31 19:44:31,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:44:31,045 INFO L225 Difference]: With dead ends: 514 [2022-01-31 19:44:31,045 INFO L226 Difference]: Without dead ends: 269 [2022-01-31 19:44:31,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=671, Invalid=2299, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 19:44:31,046 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 668 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 715 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 715 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:44:31,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 41 Invalid, 1728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [715 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:44:31,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-01-31 19:44:31,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 257. [2022-01-31 19:44:31,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.0277777777777777) internal successors, (259), 252 states have internal predecessors, (259), 3 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) [2022-01-31 19:44:31,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 263 transitions. [2022-01-31 19:44:31,395 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 263 transitions. Word has length 182 [2022-01-31 19:44:31,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:44:31,395 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 263 transitions. [2022-01-31 19:44:31,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 37 states have internal predecessors, (88), 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) [2022-01-31 19:44:31,395 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 263 transitions. [2022-01-31 19:44:31,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-01-31 19:44:31,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:44:31,396 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:44:31,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 19:44:31,396 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:44:31,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:44:31,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1173294895, now seen corresponding path program 47 times [2022-01-31 19:44:31,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:44:31,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016308565] [2022-01-31 19:44:31,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:44:31,398 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:44:31,398 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:44:31,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:44:31,399 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:44:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:31,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:31,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:31,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:44:31,842 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:31,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016308565] [2022-01-31 19:44:31,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1016308565] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:31,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:31,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 19:44:31,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50969806] [2022-01-31 19:44:31,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:31,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 19:44:31,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:31,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 19:44:31,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 19:44:31,843 INFO L87 Difference]: Start difference. First operand 257 states and 263 transitions. Second operand has 38 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 37 states have internal predecessors, (88), 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) [2022-01-31 19:44:32,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:44:32,990 INFO L93 Difference]: Finished difference Result 264 states and 270 transitions. [2022-01-31 19:44:32,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 19:44:32,990 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 37 states have internal predecessors, (88), 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 184 [2022-01-31 19:44:32,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:44:32,991 INFO L225 Difference]: With dead ends: 264 [2022-01-31 19:44:32,991 INFO L226 Difference]: Without dead ends: 191 [2022-01-31 19:44:32,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1086, Invalid=4026, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 19:44:32,992 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 396 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:44:32,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 59 Invalid, 1873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:44:32,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-31 19:44:33,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-01-31 19:44:33,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.0268817204301075) internal successors, (191), 186 states have internal predecessors, (191), 3 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) [2022-01-31 19:44:33,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 195 transitions. [2022-01-31 19:44:33,216 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 195 transitions. Word has length 184 [2022-01-31 19:44:33,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:44:33,216 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 195 transitions. [2022-01-31 19:44:33,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 37 states have internal predecessors, (88), 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) [2022-01-31 19:44:33,216 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 195 transitions. [2022-01-31 19:44:33,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-31 19:44:33,217 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:44:33,217 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:44:33,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 19:44:33,217 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:44:33,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:44:33,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1299807881, now seen corresponding path program 48 times [2022-01-31 19:44:33,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:44:33,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808032907] [2022-01-31 19:44:33,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:44:33,218 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:44:33,218 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:44:33,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:44:33,219 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:44:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:14,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:45:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:14,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:45:14,765 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:45:14,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808032907] [2022-01-31 19:45:14,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1808032907] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:45:14,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:45:14,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [177] imperfect sequences [] total 177 [2022-01-31 19:45:14,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303663845] [2022-01-31 19:45:14,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:45:14,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 177 states [2022-01-31 19:45:14,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:45:14,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2022-01-31 19:45:14,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2151, Invalid=29001, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 19:45:14,768 INFO L87 Difference]: Start difference. First operand 191 states and 195 transitions. Second operand has 177 states, 177 states have (on average 1.0508474576271187) internal successors, (186), 175 states have internal predecessors, (186), 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) [2022-01-31 19:46:08,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:08,933 INFO L93 Difference]: Finished difference Result 313 states and 322 transitions. [2022-01-31 19:46:08,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-01-31 19:46:08,933 INFO L78 Accepts]: Start accepts. Automaton has has 177 states, 177 states have (on average 1.0508474576271187) internal successors, (186), 175 states have internal predecessors, (186), 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 190 [2022-01-31 19:46:08,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:08,934 INFO L225 Difference]: With dead ends: 313 [2022-01-31 19:46:08,934 INFO L226 Difference]: Without dead ends: 308 [2022-01-31 19:46:08,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29922 ImplicationChecksByTransitivity, 72.7s TimeCoverageRelationStatistics Valid=8568, Invalid=99344, Unknown=0, NotChecked=0, Total=107912 [2022-01-31 19:46:08,938 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 8554 mSolverCounterSat, 748 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 9302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 748 IncrementalHoareTripleChecker+Valid, 8554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:08,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 246 Invalid, 9302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [748 Valid, 8554 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2022-01-31 19:46:08,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-01-31 19:46:09,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 268. [2022-01-31 19:46:09,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 263 states have (on average 1.0304182509505704) internal successors, (271), 263 states have internal predecessors, (271), 3 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) [2022-01-31 19:46:09,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 275 transitions. [2022-01-31 19:46:09,309 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 275 transitions. Word has length 190 [2022-01-31 19:46:09,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:09,309 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 275 transitions. [2022-01-31 19:46:09,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 177 states, 177 states have (on average 1.0508474576271187) internal successors, (186), 175 states have internal predecessors, (186), 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) [2022-01-31 19:46:09,309 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 275 transitions. [2022-01-31 19:46:09,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-01-31 19:46:09,310 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:09,310 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:09,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 19:46:09,310 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:09,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:09,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1783163673, now seen corresponding path program 49 times [2022-01-31 19:46:09,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:09,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804361367] [2022-01-31 19:46:09,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:09,312 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:09,312 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:09,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:09,313 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:09,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:09,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:09,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:09,917 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:09,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804361367] [2022-01-31 19:46:09,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1804361367] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:09,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:09,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 19:46:09,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338915932] [2022-01-31 19:46:09,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:09,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 19:46:09,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:09,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 19:46:09,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 19:46:09,918 INFO L87 Difference]: Start difference. First operand 268 states and 275 transitions. Second operand has 40 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 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) [2022-01-31 19:46:11,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:11,401 INFO L93 Difference]: Finished difference Result 542 states and 558 transitions. [2022-01-31 19:46:11,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 19:46:11,402 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 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 192 [2022-01-31 19:46:11,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:11,403 INFO L225 Difference]: With dead ends: 542 [2022-01-31 19:46:11,403 INFO L226 Difference]: Without dead ends: 283 [2022-01-31 19:46:11,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=746, Invalid=2560, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 19:46:11,421 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 712 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 748 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 748 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:11,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [712 Valid, 35 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [748 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:46:11,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-01-31 19:46:11,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 271. [2022-01-31 19:46:11,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 266 states have (on average 1.0263157894736843) internal successors, (273), 266 states have internal predecessors, (273), 3 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) [2022-01-31 19:46:11,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 277 transitions. [2022-01-31 19:46:11,890 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 277 transitions. Word has length 192 [2022-01-31 19:46:11,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:11,890 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 277 transitions. [2022-01-31 19:46:11,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 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) [2022-01-31 19:46:11,891 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 277 transitions. [2022-01-31 19:46:11,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-01-31 19:46:11,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:11,891 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:11,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 19:46:11,891 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:11,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:11,892 INFO L85 PathProgramCache]: Analyzing trace with hash -2053874555, now seen corresponding path program 50 times [2022-01-31 19:46:11,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:11,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269271270] [2022-01-31 19:46:11,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:11,893 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:11,893 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:11,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:11,894 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:12,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:12,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:12,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:12,362 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:12,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269271270] [2022-01-31 19:46:12,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [269271270] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:12,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:12,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 19:46:12,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028542633] [2022-01-31 19:46:12,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:12,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 19:46:12,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:12,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 19:46:12,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1192, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 19:46:12,363 INFO L87 Difference]: Start difference. First operand 271 states and 277 transitions. Second operand has 40 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 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) [2022-01-31 19:46:13,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:13,727 INFO L93 Difference]: Finished difference Result 278 states and 284 transitions. [2022-01-31 19:46:13,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 19:46:13,727 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 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 194 [2022-01-31 19:46:13,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:13,728 INFO L225 Difference]: With dead ends: 278 [2022-01-31 19:46:13,728 INFO L226 Difference]: Without dead ends: 201 [2022-01-31 19:46:13,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1212, Invalid=4488, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 19:46:13,732 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 452 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 2012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 412 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:13,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 57 Invalid, 2012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [412 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:46:13,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-01-31 19:46:14,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-01-31 19:46:14,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.0255102040816326) internal successors, (201), 196 states have internal predecessors, (201), 3 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) [2022-01-31 19:46:14,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 205 transitions. [2022-01-31 19:46:14,008 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 205 transitions. Word has length 194 [2022-01-31 19:46:14,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:14,008 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 205 transitions. [2022-01-31 19:46:14,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 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) [2022-01-31 19:46:14,008 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 205 transitions. [2022-01-31 19:46:14,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-01-31 19:46:14,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:14,009 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:14,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 19:46:14,009 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:14,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:14,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1657490593, now seen corresponding path program 51 times [2022-01-31 19:46:14,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:14,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023297571] [2022-01-31 19:46:14,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:14,010 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:14,010 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:14,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:14,012 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:14,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:00,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:00,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:00,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:47:00,263 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:00,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023297571] [2022-01-31 19:47:00,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2023297571] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:00,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:00,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [190] imperfect sequences [] total 190 [2022-01-31 19:47:00,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803279059] [2022-01-31 19:47:00,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:00,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2022-01-31 19:47:00,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:00,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2022-01-31 19:47:00,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3142, Invalid=32768, Unknown=0, NotChecked=0, Total=35910 [2022-01-31 19:47:00,267 INFO L87 Difference]: Start difference. First operand 201 states and 205 transitions. Second operand has 190 states, 190 states have (on average 1.0315789473684212) internal successors, (196), 188 states have internal predecessors, (196), 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) [2022-01-31 19:47:45,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:45,840 INFO L93 Difference]: Finished difference Result 330 states and 339 transitions. [2022-01-31 19:47:45,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2022-01-31 19:47:45,841 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 190 states have (on average 1.0315789473684212) internal successors, (196), 188 states have internal predecessors, (196), 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 200 [2022-01-31 19:47:45,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:45,842 INFO L225 Difference]: With dead ends: 330 [2022-01-31 19:47:45,842 INFO L226 Difference]: Without dead ends: 325 [2022-01-31 19:47:45,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32503 ImplicationChecksByTransitivity, 63.3s TimeCoverageRelationStatistics Valid=7467, Invalid=87705, Unknown=0, NotChecked=0, Total=95172 [2022-01-31 19:47:45,845 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 10490 mSolverCounterSat, 702 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 11192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 702 IncrementalHoareTripleChecker+Valid, 10490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:45,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 289 Invalid, 11192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [702 Valid, 10490 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2022-01-31 19:47:45,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-01-31 19:47:46,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 282. [2022-01-31 19:47:46,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 277 states have (on average 1.0288808664259927) internal successors, (285), 277 states have internal predecessors, (285), 3 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) [2022-01-31 19:47:46,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 289 transitions. [2022-01-31 19:47:46,235 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 289 transitions. Word has length 200 [2022-01-31 19:47:46,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:46,235 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 289 transitions. [2022-01-31 19:47:46,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 190 states have (on average 1.0315789473684212) internal successors, (196), 188 states have internal predecessors, (196), 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) [2022-01-31 19:47:46,235 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 289 transitions. [2022-01-31 19:47:46,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-01-31 19:47:46,236 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:46,236 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:47:46,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 19:47:46,236 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:46,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:46,237 INFO L85 PathProgramCache]: Analyzing trace with hash -874824643, now seen corresponding path program 52 times [2022-01-31 19:47:46,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:46,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079515638] [2022-01-31 19:47:46,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:46,238 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:46,238 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:46,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:46,239 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:46,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:46,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:46,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:47:46,745 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:46,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079515638] [2022-01-31 19:47:46,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1079515638] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:46,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:46,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 19:47:46,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735051182] [2022-01-31 19:47:46,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:46,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 19:47:46,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:46,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 19:47:46,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1297, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 19:47:46,746 INFO L87 Difference]: Start difference. First operand 282 states and 289 transitions. Second operand has 42 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 41 states have internal predecessors, (96), 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) [2022-01-31 19:47:48,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:48,274 INFO L93 Difference]: Finished difference Result 570 states and 586 transitions. [2022-01-31 19:47:48,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 19:47:48,275 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 41 states have internal predecessors, (96), 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 202 [2022-01-31 19:47:48,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:48,275 INFO L225 Difference]: With dead ends: 570 [2022-01-31 19:47:48,275 INFO L226 Difference]: Without dead ends: 297 [2022-01-31 19:47:48,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=825, Invalid=2835, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 19:47:48,276 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 602 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 611 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 611 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:48,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 55 Invalid, 1972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [611 Valid, 1361 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:47:48,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-01-31 19:47:48,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 285. [2022-01-31 19:47:48,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 280 states have (on average 1.025) internal successors, (287), 280 states have internal predecessors, (287), 3 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) [2022-01-31 19:47:48,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 291 transitions. [2022-01-31 19:47:48,740 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 291 transitions. Word has length 202 [2022-01-31 19:47:48,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:48,741 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 291 transitions. [2022-01-31 19:47:48,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 41 states have internal predecessors, (96), 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) [2022-01-31 19:47:48,741 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 291 transitions. [2022-01-31 19:47:48,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-01-31 19:47:48,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:48,760 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:47:48,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 19:47:48,760 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:48,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:48,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1729350053, now seen corresponding path program 53 times [2022-01-31 19:47:48,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:48,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110770998] [2022-01-31 19:47:48,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:48,762 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:48,762 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:48,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:48,763 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:48,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:49,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:49,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:49,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:47:49,243 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:49,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110770998] [2022-01-31 19:47:49,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1110770998] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:49,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:49,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 19:47:49,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112846977] [2022-01-31 19:47:49,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:49,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 19:47:49,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:49,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 19:47:49,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=1315, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 19:47:49,246 INFO L87 Difference]: Start difference. First operand 285 states and 291 transitions. Second operand has 42 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 41 states have internal predecessors, (96), 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) [2022-01-31 19:47:50,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:50,603 INFO L93 Difference]: Finished difference Result 292 states and 298 transitions. [2022-01-31 19:47:50,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 19:47:50,603 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 41 states have internal predecessors, (96), 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 204 [2022-01-31 19:47:50,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:50,604 INFO L225 Difference]: With dead ends: 292 [2022-01-31 19:47:50,604 INFO L226 Difference]: Without dead ends: 211 [2022-01-31 19:47:50,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1345, Invalid=4975, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 19:47:50,605 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 637 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 2081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:50,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [637 Valid, 51 Invalid, 2081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 1502 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:47:50,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-01-31 19:47:50,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2022-01-31 19:47:50,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0242718446601942) internal successors, (211), 206 states have internal predecessors, (211), 3 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) [2022-01-31 19:47:50,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 215 transitions. [2022-01-31 19:47:50,955 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 215 transitions. Word has length 204 [2022-01-31 19:47:50,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:50,956 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 215 transitions. [2022-01-31 19:47:50,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 41 states have internal predecessors, (96), 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) [2022-01-31 19:47:50,956 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 215 transitions. [2022-01-31 19:47:50,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-01-31 19:47:50,956 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:50,956 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:47:50,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 19:47:50,957 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:50,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:50,957 INFO L85 PathProgramCache]: Analyzing trace with hash -2134960971, now seen corresponding path program 54 times [2022-01-31 19:47:50,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:50,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386829216] [2022-01-31 19:47:50,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:50,958 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:50,958 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:50,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:50,959 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:43,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:48:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:43,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:48:43,022 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:48:43,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386829216] [2022-01-31 19:48:43,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [386829216] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:48:43,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:48:43,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [200] imperfect sequences [] total 200 [2022-01-31 19:48:43,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390890564] [2022-01-31 19:48:43,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:48:43,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 200 states [2022-01-31 19:48:43,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:48:43,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2022-01-31 19:48:43,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3400, Invalid=36400, Unknown=0, NotChecked=0, Total=39800 [2022-01-31 19:48:43,036 INFO L87 Difference]: Start difference. First operand 211 states and 215 transitions. Second operand has 200 states, 200 states have (on average 1.03) internal successors, (206), 198 states have internal predecessors, (206), 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) [2022-01-31 19:49:17,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:49:17,962 INFO L93 Difference]: Finished difference Result 341 states and 348 transitions. [2022-01-31 19:49:17,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-01-31 19:49:17,962 INFO L78 Accepts]: Start accepts. Automaton has has 200 states, 200 states have (on average 1.03) internal successors, (206), 198 states have internal predecessors, (206), 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 210 [2022-01-31 19:49:17,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:49:17,963 INFO L225 Difference]: With dead ends: 341 [2022-01-31 19:49:17,963 INFO L226 Difference]: Without dead ends: 336 [2022-01-31 19:49:17,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24008 ImplicationChecksByTransitivity, 54.9s TimeCoverageRelationStatistics Valid=4535, Invalid=70815, Unknown=0, NotChecked=0, Total=75350 [2022-01-31 19:49:17,967 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 13239 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 13774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 13239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:49:17,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 508 Invalid, 13774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 13239 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2022-01-31 19:49:17,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-01-31 19:49:18,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 296. [2022-01-31 19:49:18,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 291 states have (on average 1.0274914089347078) internal successors, (299), 291 states have internal predecessors, (299), 3 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) [2022-01-31 19:49:18,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 303 transitions. [2022-01-31 19:49:18,401 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 303 transitions. Word has length 210 [2022-01-31 19:49:18,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:49:18,402 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 303 transitions. [2022-01-31 19:49:18,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 200 states, 200 states have (on average 1.03) internal successors, (206), 198 states have internal predecessors, (206), 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) [2022-01-31 19:49:18,402 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 303 transitions. [2022-01-31 19:49:18,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-01-31 19:49:18,402 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:49:18,403 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:49:18,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 19:49:18,403 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:49:18,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:49:18,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1085706221, now seen corresponding path program 55 times [2022-01-31 19:49:18,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:49:18,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566974158] [2022-01-31 19:49:18,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:49:18,404 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:49:18,404 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:49:18,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:49:18,406 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:49:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:49:18,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:49:18,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:49:18,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:49:18,913 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:49:18,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566974158] [2022-01-31 19:49:18,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [566974158] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:49:18,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:49:18,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 19:49:18,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408287716] [2022-01-31 19:49:18,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:49:18,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 19:49:18,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:49:18,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 19:49:18,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 19:49:18,915 INFO L87 Difference]: Start difference. First operand 296 states and 303 transitions. Second operand has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 43 states have internal predecessors, (100), 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) [2022-01-31 19:49:20,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:49:20,508 INFO L93 Difference]: Finished difference Result 598 states and 614 transitions. [2022-01-31 19:49:20,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 19:49:20,508 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 43 states have internal predecessors, (100), 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 212 [2022-01-31 19:49:20,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:49:20,509 INFO L225 Difference]: With dead ends: 598 [2022-01-31 19:49:20,509 INFO L226 Difference]: Without dead ends: 311 [2022-01-31 19:49:20,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=908, Invalid=3124, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 19:49:20,513 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 744 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 763 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 744 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 763 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:49:20,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [744 Valid, 47 Invalid, 1941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [763 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:49:20,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-01-31 19:49:21,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 299. [2022-01-31 19:49:21,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.0238095238095237) internal successors, (301), 294 states have internal predecessors, (301), 3 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) [2022-01-31 19:49:21,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 305 transitions. [2022-01-31 19:49:21,039 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 305 transitions. Word has length 212 [2022-01-31 19:49:21,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:49:21,039 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 305 transitions. [2022-01-31 19:49:21,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 43 states have internal predecessors, (100), 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) [2022-01-31 19:49:21,040 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 305 transitions. [2022-01-31 19:49:21,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-01-31 19:49:21,055 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:49:21,055 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:49:21,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 19:49:21,056 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:49:21,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:49:21,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1873216335, now seen corresponding path program 56 times [2022-01-31 19:49:21,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:49:21,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659620108] [2022-01-31 19:49:21,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:49:21,058 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:49:21,058 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:49:21,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:49:21,059 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:49:21,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:49:21,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:49:21,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:49:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:49:21,622 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:49:21,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659620108] [2022-01-31 19:49:21,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [659620108] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:49:21,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:49:21,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 19:49:21,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700033902] [2022-01-31 19:49:21,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:49:21,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 19:49:21,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:49:21,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 19:49:21,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 19:49:21,623 INFO L87 Difference]: Start difference. First operand 299 states and 305 transitions. Second operand has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 43 states have internal predecessors, (100), 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) [2022-01-31 19:49:23,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:49:23,126 INFO L93 Difference]: Finished difference Result 306 states and 312 transitions. [2022-01-31 19:49:23,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 19:49:23,127 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 43 states have internal predecessors, (100), 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 214 [2022-01-31 19:49:23,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:49:23,128 INFO L225 Difference]: With dead ends: 306 [2022-01-31 19:49:23,128 INFO L226 Difference]: Without dead ends: 221 [2022-01-31 19:49:23,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1485, Invalid=5487, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 19:49:23,129 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 487 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1643 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 2087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 1643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:49:23,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 69 Invalid, 2087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 1643 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:49:23,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-01-31 19:49:23,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2022-01-31 19:49:23,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.0231481481481481) internal successors, (221), 216 states have internal predecessors, (221), 3 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) [2022-01-31 19:49:23,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 225 transitions. [2022-01-31 19:49:23,464 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 225 transitions. Word has length 214 [2022-01-31 19:49:23,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:49:23,464 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 225 transitions. [2022-01-31 19:49:23,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 43 states have internal predecessors, (100), 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) [2022-01-31 19:49:23,465 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 225 transitions. [2022-01-31 19:49:23,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-01-31 19:49:23,467 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:49:23,467 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:49:23,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 19:49:23,468 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:49:23,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:49:23,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1556938101, now seen corresponding path program 57 times [2022-01-31 19:49:23,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:49:23,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535049960] [2022-01-31 19:49:23,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:49:23,469 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:49:23,469 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:49:23,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:49:23,470 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:49:23,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:50:18,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:50:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:50:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:50:18,366 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:50:18,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535049960] [2022-01-31 19:50:18,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1535049960] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:50:18,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:50:18,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [209] imperfect sequences [] total 209 [2022-01-31 19:50:18,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392855340] [2022-01-31 19:50:18,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:50:18,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 209 states [2022-01-31 19:50:18,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:50:18,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 209 interpolants. [2022-01-31 19:50:18,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3467, Invalid=40005, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 19:50:18,369 INFO L87 Difference]: Start difference. First operand 221 states and 225 transitions. Second operand has 209 states, 209 states have (on average 1.0334928229665072) internal successors, (216), 207 states have internal predecessors, (216), 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)