/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/locks/test_locks_14-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 04:29:09,444 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 04:29:09,445 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 04:29:09,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 04:29:09,514 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-24 04:29:09,515 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-24 04:29:09,515 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-24 04:29:09,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-24 04:29:09,516 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-24 04:29:09,517 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-24 04:29:09,518 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-24 04:29:09,519 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-24 04:29:09,520 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-24 04:29:09,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-24 04:29:09,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-24 04:29:09,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-24 04:29:09,535 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-24 04:29:09,539 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 04:29:09,540 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 04:29:09,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 04:29:09,542 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 04:29:09,557 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 04:29:09,557 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 04:29:09,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 04:29:09,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 04:29:09,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 04:29:09,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 04:29:09,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 04:29:09,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 04:29:09,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 04:29:09,559 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 04:29:09,559 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 04:29:09,559 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 04:29:09,559 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 04:29:09,559 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 04:29:09,559 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 04:29:09,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 04:29:09,560 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 04:29:09,560 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 04:29:09,560 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 04:29:09,560 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 04:29:09,560 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 04:29:09,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 04:29:09,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 04:29:09,795 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 04:29:09,796 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 04:29:09,796 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 04:29:09,797 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_14-1.c [2022-02-24 04:29:09,877 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a365c2e6/ad49ee047a9448f5b4ebc3252f467070/FLAGb1e86617d [2022-02-24 04:29:10,248 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 04:29:10,248 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_14-1.c [2022-02-24 04:29:10,259 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a365c2e6/ad49ee047a9448f5b4ebc3252f467070/FLAGb1e86617d [2022-02-24 04:29:10,273 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a365c2e6/ad49ee047a9448f5b4ebc3252f467070 [2022-02-24 04:29:10,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 04:29:10,276 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 04:29:10,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 04:29:10,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 04:29:10,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 04:29:10,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:29:10" (1/1) ... [2022-02-24 04:29:10,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d29ef9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:29:10, skipping insertion in model container [2022-02-24 04:29:10,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:29:10" (1/1) ... [2022-02-24 04:29:10,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 04:29:10,310 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 04:29:10,504 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_14-1.c[5283,5296] [2022-02-24 04:29:10,510 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 04:29:10,515 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 04:29:10,537 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_14-1.c[5283,5296] [2022-02-24 04:29:10,538 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 04:29:10,546 INFO L208 MainTranslator]: Completed translation [2022-02-24 04:29:10,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:29:10 WrapperNode [2022-02-24 04:29:10,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 04:29:10,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 04:29:10,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 04:29:10,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 04:29:10,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:29:10" (1/1) ... [2022-02-24 04:29:10,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:29:10" (1/1) ... [2022-02-24 04:29:10,571 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:29:10" (1/1) ... [2022-02-24 04:29:10,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:29:10" (1/1) ... [2022-02-24 04:29:10,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:29:10" (1/1) ... [2022-02-24 04:29:10,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:29:10" (1/1) ... [2022-02-24 04:29:10,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:29:10" (1/1) ... [2022-02-24 04:29:10,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 04:29:10,594 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 04:29:10,594 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 04:29:10,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 04:29:10,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:29:10" (1/1) ... [2022-02-24 04:29:10,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 04:29:10,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 04:29:10,621 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-24 04:29:10,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-24 04:29:10,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 04:29:10,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 04:29:10,650 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 04:29:10,650 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 04:29:10,650 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 04:29:10,651 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 04:29:10,651 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 04:29:10,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 04:29:10,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 04:29:10,651 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 04:29:10,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 04:29:10,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 04:29:10,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 04:29:10,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 04:29:10,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 04:29:10,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 04:29:10,734 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 04:29:10,735 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 04:29:10,945 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 04:29:10,949 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 04:29:10,950 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-24 04:29:10,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:29:10 BoogieIcfgContainer [2022-02-24 04:29:10,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 04:29:10,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 04:29:10,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 04:29:10,957 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 04:29:10,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:29:10" (1/3) ... [2022-02-24 04:29:10,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@646b0dc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:29:10, skipping insertion in model container [2022-02-24 04:29:10,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:29:10" (2/3) ... [2022-02-24 04:29:10,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@646b0dc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:29:10, skipping insertion in model container [2022-02-24 04:29:10,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:29:10" (3/3) ... [2022-02-24 04:29:10,959 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_14-1.c [2022-02-24 04:29:10,963 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 04:29:10,963 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 04:29:11,001 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 04:29:11,008 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=QVASR [2022-02-24 04:29:11,009 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 04:29:11,020 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 52 states have internal predecessors, (97), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 04:29:11,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 04:29:11,026 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:11,026 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:11,027 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:11,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:11,031 INFO L85 PathProgramCache]: Analyzing trace with hash -406532905, now seen corresponding path program 1 times [2022-02-24 04:29:11,037 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:11,037 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979543090] [2022-02-24 04:29:11,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:11,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:11,081 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:11,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:11,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:11,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:11,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:11,252 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:11,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979543090] [2022-02-24 04:29:11,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [979543090] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:11,254 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:11,254 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:11,254 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707228023] [2022-02-24 04:29:11,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:11,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:11,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:11,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:11,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:11,277 INFO L87 Difference]: Start difference. First operand has 57 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 52 states have internal predecessors, (97), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:11,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:11,476 INFO L93 Difference]: Finished difference Result 112 states and 199 transitions. [2022-02-24 04:29:11,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:11,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-24 04:29:11,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:11,488 INFO L225 Difference]: With dead ends: 112 [2022-02-24 04:29:11,488 INFO L226 Difference]: Without dead ends: 97 [2022-02-24 04:29:11,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:11,493 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 242 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:29:11,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 113 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:29:11,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-02-24 04:29:11,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 67. [2022-02-24 04:29:11,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 63 states have (on average 1.8888888888888888) internal successors, (119), 63 states have internal predecessors, (119), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:11,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 122 transitions. [2022-02-24 04:29:11,542 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 122 transitions. Word has length 25 [2022-02-24 04:29:11,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:11,542 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 122 transitions. [2022-02-24 04:29:11,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:11,543 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 122 transitions. [2022-02-24 04:29:11,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 04:29:11,543 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:11,543 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:11,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 04:29:11,544 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:11,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:11,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1994880807, now seen corresponding path program 1 times [2022-02-24 04:29:11,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:11,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566582990] [2022-02-24 04:29:11,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:11,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:11,546 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:11,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:11,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:11,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:11,591 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:11,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566582990] [2022-02-24 04:29:11,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [566582990] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:11,591 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:11,592 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:11,592 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587569838] [2022-02-24 04:29:11,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:11,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:11,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:11,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:11,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:11,593 INFO L87 Difference]: Start difference. First operand 67 states and 122 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:11,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:11,688 INFO L93 Difference]: Finished difference Result 158 states and 293 transitions. [2022-02-24 04:29:11,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:11,689 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-24 04:29:11,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:11,690 INFO L225 Difference]: With dead ends: 158 [2022-02-24 04:29:11,690 INFO L226 Difference]: Without dead ends: 97 [2022-02-24 04:29:11,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:11,691 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 208 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:29:11,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 127 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:29:11,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-02-24 04:29:11,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2022-02-24 04:29:11,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 91 states have (on average 1.879120879120879) internal successors, (171), 91 states have internal predecessors, (171), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:11,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 174 transitions. [2022-02-24 04:29:11,702 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 174 transitions. Word has length 25 [2022-02-24 04:29:11,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:11,702 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 174 transitions. [2022-02-24 04:29:11,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:11,702 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 174 transitions. [2022-02-24 04:29:11,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 04:29:11,703 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:11,703 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] [2022-02-24 04:29:11,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 04:29:11,703 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:11,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:11,704 INFO L85 PathProgramCache]: Analyzing trace with hash 282593920, now seen corresponding path program 1 times [2022-02-24 04:29:11,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:11,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770647879] [2022-02-24 04:29:11,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:11,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:11,706 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:11,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:11,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:11,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:11,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:11,744 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:11,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770647879] [2022-02-24 04:29:11,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [770647879] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:11,745 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:11,745 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:11,745 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305500536] [2022-02-24 04:29:11,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:11,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:11,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:11,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:11,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:11,746 INFO L87 Difference]: Start difference. First operand 95 states and 174 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:11,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:11,833 INFO L93 Difference]: Finished difference Result 145 states and 262 transitions. [2022-02-24 04:29:11,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:11,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-24 04:29:11,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:11,834 INFO L225 Difference]: With dead ends: 145 [2022-02-24 04:29:11,834 INFO L226 Difference]: Without dead ends: 100 [2022-02-24 04:29:11,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:11,836 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 183 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:29:11,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 153 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:29:11,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-02-24 04:29:11,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2022-02-24 04:29:11,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 94 states have (on average 1.8404255319148937) internal successors, (173), 94 states have internal predecessors, (173), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:11,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 176 transitions. [2022-02-24 04:29:11,845 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 176 transitions. Word has length 26 [2022-02-24 04:29:11,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:11,845 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 176 transitions. [2022-02-24 04:29:11,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:11,846 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 176 transitions. [2022-02-24 04:29:11,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 04:29:11,846 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:11,846 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] [2022-02-24 04:29:11,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 04:29:11,846 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:11,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:11,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1711550786, now seen corresponding path program 1 times [2022-02-24 04:29:11,847 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:11,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163572719] [2022-02-24 04:29:11,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:11,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:11,849 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:11,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:11,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:11,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:11,883 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:11,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163572719] [2022-02-24 04:29:11,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1163572719] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:11,883 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:11,884 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:11,884 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482014165] [2022-02-24 04:29:11,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:11,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:11,884 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:11,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:11,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:11,885 INFO L87 Difference]: Start difference. First operand 98 states and 176 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:11,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:11,976 INFO L93 Difference]: Finished difference Result 274 states and 504 transitions. [2022-02-24 04:29:11,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:11,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-24 04:29:11,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:11,977 INFO L225 Difference]: With dead ends: 274 [2022-02-24 04:29:11,978 INFO L226 Difference]: Without dead ends: 185 [2022-02-24 04:29:11,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:11,979 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 231 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:29:11,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 103 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:29:11,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-02-24 04:29:11,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2022-02-24 04:29:12,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 179 states have (on average 1.8435754189944134) internal successors, (330), 179 states have internal predecessors, (330), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:12,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 333 transitions. [2022-02-24 04:29:12,003 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 333 transitions. Word has length 26 [2022-02-24 04:29:12,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:12,003 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 333 transitions. [2022-02-24 04:29:12,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:12,004 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 333 transitions. [2022-02-24 04:29:12,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 04:29:12,004 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:12,004 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] [2022-02-24 04:29:12,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 04:29:12,005 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:12,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:12,005 INFO L85 PathProgramCache]: Analyzing trace with hash -123202884, now seen corresponding path program 1 times [2022-02-24 04:29:12,005 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:12,005 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591315479] [2022-02-24 04:29:12,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:12,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:12,007 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:12,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:12,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:12,047 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:12,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591315479] [2022-02-24 04:29:12,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1591315479] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:12,047 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:12,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:12,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718369506] [2022-02-24 04:29:12,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:12,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:12,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:12,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:12,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:12,049 INFO L87 Difference]: Start difference. First operand 183 states and 333 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:12,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:12,141 INFO L93 Difference]: Finished difference Result 239 states and 435 transitions. [2022-02-24 04:29:12,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:12,141 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-24 04:29:12,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:12,142 INFO L225 Difference]: With dead ends: 239 [2022-02-24 04:29:12,142 INFO L226 Difference]: Without dead ends: 237 [2022-02-24 04:29:12,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:12,143 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 150 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:29:12,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 176 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:29:12,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-02-24 04:29:12,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 183. [2022-02-24 04:29:12,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 179 states have (on average 1.8324022346368716) internal successors, (328), 179 states have internal predecessors, (328), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:12,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 331 transitions. [2022-02-24 04:29:12,159 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 331 transitions. Word has length 26 [2022-02-24 04:29:12,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:12,159 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 331 transitions. [2022-02-24 04:29:12,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:12,159 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 331 transitions. [2022-02-24 04:29:12,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-24 04:29:12,160 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:12,160 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] [2022-02-24 04:29:12,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 04:29:12,161 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:12,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:12,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1518254386, now seen corresponding path program 1 times [2022-02-24 04:29:12,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:12,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38273333] [2022-02-24 04:29:12,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:12,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:12,162 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:12,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:12,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:12,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:12,193 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:12,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38273333] [2022-02-24 04:29:12,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [38273333] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:12,193 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:12,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:12,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130506942] [2022-02-24 04:29:12,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:12,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:12,194 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:12,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:12,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:12,195 INFO L87 Difference]: Start difference. First operand 183 states and 331 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:12,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:12,291 INFO L93 Difference]: Finished difference Result 347 states and 635 transitions. [2022-02-24 04:29:12,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:12,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-02-24 04:29:12,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:12,293 INFO L225 Difference]: With dead ends: 347 [2022-02-24 04:29:12,293 INFO L226 Difference]: Without dead ends: 345 [2022-02-24 04:29:12,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:12,294 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 222 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:29:12,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 100 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:29:12,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-02-24 04:29:12,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 247. [2022-02-24 04:29:12,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 243 states have (on average 1.8189300411522633) internal successors, (442), 243 states have internal predecessors, (442), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:12,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 445 transitions. [2022-02-24 04:29:12,312 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 445 transitions. Word has length 27 [2022-02-24 04:29:12,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:12,312 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 445 transitions. [2022-02-24 04:29:12,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:12,312 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 445 transitions. [2022-02-24 04:29:12,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-24 04:29:12,313 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:12,313 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] [2022-02-24 04:29:12,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 04:29:12,314 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:12,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:12,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1188365008, now seen corresponding path program 1 times [2022-02-24 04:29:12,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:12,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132917099] [2022-02-24 04:29:12,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:12,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:12,316 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:12,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:12,345 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:12,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132917099] [2022-02-24 04:29:12,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2132917099] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:12,346 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:12,346 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:12,346 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908630112] [2022-02-24 04:29:12,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:12,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:12,346 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:12,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:12,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:12,347 INFO L87 Difference]: Start difference. First operand 247 states and 445 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:12,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:12,460 INFO L93 Difference]: Finished difference Result 591 states and 1075 transitions. [2022-02-24 04:29:12,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:12,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-02-24 04:29:12,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:12,462 INFO L225 Difference]: With dead ends: 591 [2022-02-24 04:29:12,462 INFO L226 Difference]: Without dead ends: 353 [2022-02-24 04:29:12,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:12,466 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 196 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:29:12,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 131 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:29:12,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-02-24 04:29:12,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 351. [2022-02-24 04:29:12,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 347 states have (on average 1.8097982708933718) internal successors, (628), 347 states have internal predecessors, (628), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:12,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 631 transitions. [2022-02-24 04:29:12,487 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 631 transitions. Word has length 27 [2022-02-24 04:29:12,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:12,487 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 631 transitions. [2022-02-24 04:29:12,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:12,488 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 631 transitions. [2022-02-24 04:29:12,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 04:29:12,490 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:12,491 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] [2022-02-24 04:29:12,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 04:29:12,491 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:12,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:12,492 INFO L85 PathProgramCache]: Analyzing trace with hash 178967059, now seen corresponding path program 1 times [2022-02-24 04:29:12,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:12,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145254138] [2022-02-24 04:29:12,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:12,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:12,493 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:12,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:12,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:12,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:12,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:12,519 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:12,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145254138] [2022-02-24 04:29:12,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1145254138] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:12,519 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:12,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:12,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196319520] [2022-02-24 04:29:12,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:12,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:12,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:12,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:12,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:12,520 INFO L87 Difference]: Start difference. First operand 351 states and 631 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:12,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:12,618 INFO L93 Difference]: Finished difference Result 529 states and 949 transitions. [2022-02-24 04:29:12,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:12,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-24 04:29:12,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:12,619 INFO L225 Difference]: With dead ends: 529 [2022-02-24 04:29:12,619 INFO L226 Difference]: Without dead ends: 359 [2022-02-24 04:29:12,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:12,620 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 181 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:29:12,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 147 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:29:12,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-02-24 04:29:12,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 357. [2022-02-24 04:29:12,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 353 states have (on average 1.7903682719546743) internal successors, (632), 353 states have internal predecessors, (632), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:12,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 635 transitions. [2022-02-24 04:29:12,646 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 635 transitions. Word has length 28 [2022-02-24 04:29:12,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:12,646 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 635 transitions. [2022-02-24 04:29:12,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:12,646 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 635 transitions. [2022-02-24 04:29:12,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 04:29:12,647 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:12,647 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] [2022-02-24 04:29:12,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 04:29:12,647 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:12,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:12,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1815177647, now seen corresponding path program 1 times [2022-02-24 04:29:12,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:12,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511274203] [2022-02-24 04:29:12,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:12,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:12,649 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:12,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:12,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:12,673 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:12,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511274203] [2022-02-24 04:29:12,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1511274203] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:12,673 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:12,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:12,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510021845] [2022-02-24 04:29:12,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:12,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:12,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:12,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:12,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:12,674 INFO L87 Difference]: Start difference. First operand 357 states and 635 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:12,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:12,791 INFO L93 Difference]: Finished difference Result 669 states and 1205 transitions. [2022-02-24 04:29:12,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:12,791 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-24 04:29:12,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:12,795 INFO L225 Difference]: With dead ends: 669 [2022-02-24 04:29:12,795 INFO L226 Difference]: Without dead ends: 667 [2022-02-24 04:29:12,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:12,796 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 215 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:29:12,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 99 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:29:12,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-02-24 04:29:12,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 489. [2022-02-24 04:29:12,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 485 states have (on average 1.7649484536082474) internal successors, (856), 485 states have internal predecessors, (856), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:12,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 859 transitions. [2022-02-24 04:29:12,822 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 859 transitions. Word has length 28 [2022-02-24 04:29:12,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:12,822 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 859 transitions. [2022-02-24 04:29:12,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:12,823 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 859 transitions. [2022-02-24 04:29:12,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 04:29:12,823 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:12,823 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] [2022-02-24 04:29:12,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 04:29:12,824 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:12,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:12,824 INFO L85 PathProgramCache]: Analyzing trace with hash 891441747, now seen corresponding path program 1 times [2022-02-24 04:29:12,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:12,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024172523] [2022-02-24 04:29:12,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:12,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:12,825 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:12,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:12,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:12,848 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:12,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024172523] [2022-02-24 04:29:12,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1024172523] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:12,848 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:12,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:12,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695505077] [2022-02-24 04:29:12,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:12,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:12,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:12,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:12,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:12,849 INFO L87 Difference]: Start difference. First operand 489 states and 859 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:12,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:12,958 INFO L93 Difference]: Finished difference Result 1165 states and 2061 transitions. [2022-02-24 04:29:12,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:12,958 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-24 04:29:12,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:12,960 INFO L225 Difference]: With dead ends: 1165 [2022-02-24 04:29:12,961 INFO L226 Difference]: Without dead ends: 691 [2022-02-24 04:29:12,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:12,962 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 190 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:29:12,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 133 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:29:12,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-02-24 04:29:13,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 689. [2022-02-24 04:29:13,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 685 states have (on average 1.7576642335766424) internal successors, (1204), 685 states have internal predecessors, (1204), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:13,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1207 transitions. [2022-02-24 04:29:13,029 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1207 transitions. Word has length 28 [2022-02-24 04:29:13,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:13,030 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 1207 transitions. [2022-02-24 04:29:13,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:13,030 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1207 transitions. [2022-02-24 04:29:13,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 04:29:13,031 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:13,031 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] [2022-02-24 04:29:13,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 04:29:13,032 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:13,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:13,032 INFO L85 PathProgramCache]: Analyzing trace with hash -435719099, now seen corresponding path program 1 times [2022-02-24 04:29:13,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:13,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849241884] [2022-02-24 04:29:13,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:13,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:13,034 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:13,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:13,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:13,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:13,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:13,068 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:13,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849241884] [2022-02-24 04:29:13,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1849241884] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:13,068 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:13,068 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:13,068 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067376210] [2022-02-24 04:29:13,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:13,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:13,069 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:13,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:13,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:13,069 INFO L87 Difference]: Start difference. First operand 689 states and 1207 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:13,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:13,184 INFO L93 Difference]: Finished difference Result 1033 states and 1805 transitions. [2022-02-24 04:29:13,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:13,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-24 04:29:13,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:13,187 INFO L225 Difference]: With dead ends: 1033 [2022-02-24 04:29:13,187 INFO L226 Difference]: Without dead ends: 699 [2022-02-24 04:29:13,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:13,188 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 180 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:29:13,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 144 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:29:13,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-02-24 04:29:13,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 697. [2022-02-24 04:29:13,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 693 states have (on average 1.7373737373737375) internal successors, (1204), 693 states have internal predecessors, (1204), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:13,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1207 transitions. [2022-02-24 04:29:13,229 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1207 transitions. Word has length 29 [2022-02-24 04:29:13,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:13,229 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 1207 transitions. [2022-02-24 04:29:13,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:13,230 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1207 transitions. [2022-02-24 04:29:13,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 04:29:13,230 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:13,230 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] [2022-02-24 04:29:13,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 04:29:13,231 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:13,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:13,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1865103491, now seen corresponding path program 1 times [2022-02-24 04:29:13,231 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:13,231 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586645132] [2022-02-24 04:29:13,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:13,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:13,232 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:13,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:13,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:13,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:13,254 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:13,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586645132] [2022-02-24 04:29:13,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1586645132] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:13,254 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:13,254 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:13,254 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680029067] [2022-02-24 04:29:13,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:13,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:13,255 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:13,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:13,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:13,255 INFO L87 Difference]: Start difference. First operand 697 states and 1207 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:13,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:13,389 INFO L93 Difference]: Finished difference Result 1293 states and 2273 transitions. [2022-02-24 04:29:13,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:13,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-24 04:29:13,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:13,393 INFO L225 Difference]: With dead ends: 1293 [2022-02-24 04:29:13,393 INFO L226 Difference]: Without dead ends: 1291 [2022-02-24 04:29:13,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:13,394 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 208 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:29:13,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 98 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:29:13,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2022-02-24 04:29:13,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 969. [2022-02-24 04:29:13,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 965 states have (on average 1.7036269430051814) internal successors, (1644), 965 states have internal predecessors, (1644), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:13,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1647 transitions. [2022-02-24 04:29:13,445 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1647 transitions. Word has length 29 [2022-02-24 04:29:13,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:13,445 INFO L470 AbstractCegarLoop]: Abstraction has 969 states and 1647 transitions. [2022-02-24 04:29:13,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:13,445 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1647 transitions. [2022-02-24 04:29:13,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 04:29:13,446 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:13,446 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] [2022-02-24 04:29:13,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 04:29:13,447 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:13,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:13,447 INFO L85 PathProgramCache]: Analyzing trace with hash 276755589, now seen corresponding path program 1 times [2022-02-24 04:29:13,447 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:13,447 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114455974] [2022-02-24 04:29:13,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:13,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:13,448 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:13,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:13,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:13,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:13,467 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:13,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114455974] [2022-02-24 04:29:13,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [114455974] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:13,468 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:13,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:13,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563876301] [2022-02-24 04:29:13,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:13,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:13,468 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:13,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:13,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:13,469 INFO L87 Difference]: Start difference. First operand 969 states and 1647 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:13,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:13,613 INFO L93 Difference]: Finished difference Result 2301 states and 3937 transitions. [2022-02-24 04:29:13,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:13,614 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-24 04:29:13,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:13,617 INFO L225 Difference]: With dead ends: 2301 [2022-02-24 04:29:13,618 INFO L226 Difference]: Without dead ends: 1355 [2022-02-24 04:29:13,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:13,620 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 184 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:29:13,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 135 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:29:13,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2022-02-24 04:29:13,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1353. [2022-02-24 04:29:13,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1349 states have (on average 1.6990363232023722) internal successors, (2292), 1349 states have internal predecessors, (2292), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:13,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 2295 transitions. [2022-02-24 04:29:13,715 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 2295 transitions. Word has length 29 [2022-02-24 04:29:13,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:13,716 INFO L470 AbstractCegarLoop]: Abstraction has 1353 states and 2295 transitions. [2022-02-24 04:29:13,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:13,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 2295 transitions. [2022-02-24 04:29:13,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 04:29:13,717 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:13,717 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] [2022-02-24 04:29:13,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 04:29:13,717 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:13,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:13,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1983846824, now seen corresponding path program 1 times [2022-02-24 04:29:13,717 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:13,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768007220] [2022-02-24 04:29:13,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:13,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:13,719 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:13,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:13,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:13,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:13,742 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:13,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768007220] [2022-02-24 04:29:13,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [768007220] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:13,742 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:13,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:13,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124172420] [2022-02-24 04:29:13,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:13,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:13,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:13,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:13,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:13,743 INFO L87 Difference]: Start difference. First operand 1353 states and 2295 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:13,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:13,889 INFO L93 Difference]: Finished difference Result 2029 states and 3433 transitions. [2022-02-24 04:29:13,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:13,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-24 04:29:13,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:13,893 INFO L225 Difference]: With dead ends: 2029 [2022-02-24 04:29:13,893 INFO L226 Difference]: Without dead ends: 1371 [2022-02-24 04:29:13,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:13,895 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 179 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:29:13,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 141 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:29:13,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2022-02-24 04:29:14,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1369. [2022-02-24 04:29:14,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1365 states have (on average 1.6791208791208792) internal successors, (2292), 1365 states have internal predecessors, (2292), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:14,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2295 transitions. [2022-02-24 04:29:14,006 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2295 transitions. Word has length 30 [2022-02-24 04:29:14,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:14,006 INFO L470 AbstractCegarLoop]: Abstraction has 1369 states and 2295 transitions. [2022-02-24 04:29:14,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:14,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2295 transitions. [2022-02-24 04:29:14,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 04:29:14,008 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:14,008 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] [2022-02-24 04:29:14,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 04:29:14,008 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:14,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:14,008 INFO L85 PathProgramCache]: Analyzing trace with hash -10297882, now seen corresponding path program 1 times [2022-02-24 04:29:14,009 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:14,009 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027244774] [2022-02-24 04:29:14,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:14,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:14,010 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:14,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:14,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:14,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:14,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:14,029 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:14,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027244774] [2022-02-24 04:29:14,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2027244774] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:14,030 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:14,030 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:14,030 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678357635] [2022-02-24 04:29:14,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:14,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:14,030 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:14,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:14,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:14,031 INFO L87 Difference]: Start difference. First operand 1369 states and 2295 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:14,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:14,246 INFO L93 Difference]: Finished difference Result 2509 states and 4281 transitions. [2022-02-24 04:29:14,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:14,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-24 04:29:14,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:14,257 INFO L225 Difference]: With dead ends: 2509 [2022-02-24 04:29:14,257 INFO L226 Difference]: Without dead ends: 2507 [2022-02-24 04:29:14,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:14,261 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 201 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:29:14,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 97 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:29:14,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2022-02-24 04:29:14,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 1929. [2022-02-24 04:29:14,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1925 states have (on average 1.6394805194805195) internal successors, (3156), 1925 states have internal predecessors, (3156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:14,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 3159 transitions. [2022-02-24 04:29:14,375 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 3159 transitions. Word has length 30 [2022-02-24 04:29:14,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:14,376 INFO L470 AbstractCegarLoop]: Abstraction has 1929 states and 3159 transitions. [2022-02-24 04:29:14,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:14,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 3159 transitions. [2022-02-24 04:29:14,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 04:29:14,378 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:14,378 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] [2022-02-24 04:29:14,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 04:29:14,378 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:14,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:14,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1598645784, now seen corresponding path program 1 times [2022-02-24 04:29:14,378 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:14,378 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083805736] [2022-02-24 04:29:14,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:14,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:14,379 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:14,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:14,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:14,397 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:14,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083805736] [2022-02-24 04:29:14,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2083805736] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:14,397 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:14,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:14,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135737873] [2022-02-24 04:29:14,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:14,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:14,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:14,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:14,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:14,398 INFO L87 Difference]: Start difference. First operand 1929 states and 3159 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:14,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:14,648 INFO L93 Difference]: Finished difference Result 4557 states and 7513 transitions. [2022-02-24 04:29:14,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:14,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-24 04:29:14,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:14,657 INFO L225 Difference]: With dead ends: 4557 [2022-02-24 04:29:14,657 INFO L226 Difference]: Without dead ends: 2667 [2022-02-24 04:29:14,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:14,662 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 178 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:29:14,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 137 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:29:14,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2022-02-24 04:29:14,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 2665. [2022-02-24 04:29:14,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2665 states, 2661 states have (on average 1.636978579481398) internal successors, (4356), 2661 states have internal predecessors, (4356), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:14,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2665 states to 2665 states and 4359 transitions. [2022-02-24 04:29:14,860 INFO L78 Accepts]: Start accepts. Automaton has 2665 states and 4359 transitions. Word has length 30 [2022-02-24 04:29:14,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:14,860 INFO L470 AbstractCegarLoop]: Abstraction has 2665 states and 4359 transitions. [2022-02-24 04:29:14,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:14,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2665 states and 4359 transitions. [2022-02-24 04:29:14,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 04:29:14,863 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:14,863 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, 1] [2022-02-24 04:29:14,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 04:29:14,863 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:14,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:14,863 INFO L85 PathProgramCache]: Analyzing trace with hash -319020550, now seen corresponding path program 1 times [2022-02-24 04:29:14,863 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:14,863 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830679287] [2022-02-24 04:29:14,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:14,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:14,865 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:14,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:14,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:14,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:14,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:14,903 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:14,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830679287] [2022-02-24 04:29:14,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1830679287] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:14,904 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:14,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:14,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823773777] [2022-02-24 04:29:14,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:14,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:14,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:14,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:14,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:14,905 INFO L87 Difference]: Start difference. First operand 2665 states and 4359 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:15,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:15,177 INFO L93 Difference]: Finished difference Result 3997 states and 6521 transitions. [2022-02-24 04:29:15,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:15,178 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-24 04:29:15,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:15,185 INFO L225 Difference]: With dead ends: 3997 [2022-02-24 04:29:15,185 INFO L226 Difference]: Without dead ends: 2699 [2022-02-24 04:29:15,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:15,189 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 178 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:29:15,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 138 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:29:15,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2022-02-24 04:29:15,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 2697. [2022-02-24 04:29:15,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2697 states, 2693 states have (on average 1.617526921648719) internal successors, (4356), 2693 states have internal predecessors, (4356), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:15,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2697 states to 2697 states and 4359 transitions. [2022-02-24 04:29:15,378 INFO L78 Accepts]: Start accepts. Automaton has 2697 states and 4359 transitions. Word has length 31 [2022-02-24 04:29:15,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:15,378 INFO L470 AbstractCegarLoop]: Abstraction has 2697 states and 4359 transitions. [2022-02-24 04:29:15,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:15,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2697 states and 4359 transitions. [2022-02-24 04:29:15,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 04:29:15,380 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:15,381 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, 1] [2022-02-24 04:29:15,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 04:29:15,381 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:15,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:15,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1981802040, now seen corresponding path program 1 times [2022-02-24 04:29:15,381 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:15,381 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287255854] [2022-02-24 04:29:15,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:15,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:15,382 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:15,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:15,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:15,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:15,401 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:15,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287255854] [2022-02-24 04:29:15,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1287255854] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:15,401 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:15,402 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:15,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002387000] [2022-02-24 04:29:15,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:15,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:15,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:15,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:15,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:15,402 INFO L87 Difference]: Start difference. First operand 2697 states and 4359 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:15,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:15,757 INFO L93 Difference]: Finished difference Result 4877 states and 8041 transitions. [2022-02-24 04:29:15,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:15,757 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-24 04:29:15,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:15,771 INFO L225 Difference]: With dead ends: 4877 [2022-02-24 04:29:15,771 INFO L226 Difference]: Without dead ends: 4875 [2022-02-24 04:29:15,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:15,772 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 194 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:29:15,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 96 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:29:15,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2022-02-24 04:29:16,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 3849. [2022-02-24 04:29:16,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3849 states, 3845 states have (on average 1.5739921976592979) internal successors, (6052), 3845 states have internal predecessors, (6052), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:16,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3849 states to 3849 states and 6055 transitions. [2022-02-24 04:29:16,056 INFO L78 Accepts]: Start accepts. Automaton has 3849 states and 6055 transitions. Word has length 31 [2022-02-24 04:29:16,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:16,057 INFO L470 AbstractCegarLoop]: Abstraction has 3849 states and 6055 transitions. [2022-02-24 04:29:16,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:16,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3849 states and 6055 transitions. [2022-02-24 04:29:16,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 04:29:16,060 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:16,061 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, 1] [2022-02-24 04:29:16,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 04:29:16,061 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:16,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:16,061 INFO L85 PathProgramCache]: Analyzing trace with hash 393454138, now seen corresponding path program 1 times [2022-02-24 04:29:16,061 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:16,061 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843368895] [2022-02-24 04:29:16,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:16,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:16,062 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:16,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:16,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:16,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:16,082 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:16,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843368895] [2022-02-24 04:29:16,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [843368895] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:16,083 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:16,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:16,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354958752] [2022-02-24 04:29:16,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:16,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:16,083 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:16,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:16,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:16,084 INFO L87 Difference]: Start difference. First operand 3849 states and 6055 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:16,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:16,569 INFO L93 Difference]: Finished difference Result 9037 states and 14313 transitions. [2022-02-24 04:29:16,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:16,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-24 04:29:16,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:16,584 INFO L225 Difference]: With dead ends: 9037 [2022-02-24 04:29:16,585 INFO L226 Difference]: Without dead ends: 5259 [2022-02-24 04:29:16,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:16,594 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 172 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:29:16,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 139 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:29:16,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5259 states. [2022-02-24 04:29:16,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5259 to 5257. [2022-02-24 04:29:16,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5257 states, 5253 states have (on average 1.5724347991623835) internal successors, (8260), 5253 states have internal predecessors, (8260), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:17,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5257 states to 5257 states and 8263 transitions. [2022-02-24 04:29:17,001 INFO L78 Accepts]: Start accepts. Automaton has 5257 states and 8263 transitions. Word has length 31 [2022-02-24 04:29:17,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:17,001 INFO L470 AbstractCegarLoop]: Abstraction has 5257 states and 8263 transitions. [2022-02-24 04:29:17,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:17,002 INFO L276 IsEmpty]: Start isEmpty. Operand 5257 states and 8263 transitions. [2022-02-24 04:29:17,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 04:29:17,006 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:17,006 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, 1, 1] [2022-02-24 04:29:17,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 04:29:17,006 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:17,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:17,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1306535229, now seen corresponding path program 1 times [2022-02-24 04:29:17,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:17,007 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224495800] [2022-02-24 04:29:17,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:17,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:17,008 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:17,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:17,023 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:17,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224495800] [2022-02-24 04:29:17,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1224495800] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:17,023 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:17,023 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:17,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778386196] [2022-02-24 04:29:17,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:17,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:17,024 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:17,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:17,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:17,024 INFO L87 Difference]: Start difference. First operand 5257 states and 8263 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:17,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:17,433 INFO L93 Difference]: Finished difference Result 7885 states and 12361 transitions. [2022-02-24 04:29:17,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:17,433 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-24 04:29:17,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:17,442 INFO L225 Difference]: With dead ends: 7885 [2022-02-24 04:29:17,442 INFO L226 Difference]: Without dead ends: 5323 [2022-02-24 04:29:17,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:17,447 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 177 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:29:17,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 135 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:29:17,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5323 states. [2022-02-24 04:29:17,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5323 to 5321. [2022-02-24 04:29:17,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5321 states, 5317 states have (on average 1.5535076170772992) internal successors, (8260), 5317 states have internal predecessors, (8260), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:17,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5321 states to 5321 states and 8263 transitions. [2022-02-24 04:29:17,827 INFO L78 Accepts]: Start accepts. Automaton has 5321 states and 8263 transitions. Word has length 32 [2022-02-24 04:29:17,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:17,827 INFO L470 AbstractCegarLoop]: Abstraction has 5321 states and 8263 transitions. [2022-02-24 04:29:17,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:17,827 INFO L276 IsEmpty]: Start isEmpty. Operand 5321 states and 8263 transitions. [2022-02-24 04:29:17,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 04:29:17,831 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:17,831 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, 1, 1] [2022-02-24 04:29:17,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 04:29:17,831 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:17,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:17,832 INFO L85 PathProgramCache]: Analyzing trace with hash -687609477, now seen corresponding path program 1 times [2022-02-24 04:29:17,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:17,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799003692] [2022-02-24 04:29:17,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:17,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:17,834 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:17,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:17,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:17,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:17,850 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:17,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799003692] [2022-02-24 04:29:17,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [799003692] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:17,850 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:17,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:17,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28984875] [2022-02-24 04:29:17,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:17,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:17,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:17,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:17,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:17,852 INFO L87 Difference]: Start difference. First operand 5321 states and 8263 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:18,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:18,664 INFO L93 Difference]: Finished difference Result 9485 states and 15049 transitions. [2022-02-24 04:29:18,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:18,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-24 04:29:18,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:18,681 INFO L225 Difference]: With dead ends: 9485 [2022-02-24 04:29:18,682 INFO L226 Difference]: Without dead ends: 9483 [2022-02-24 04:29:18,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:18,685 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 187 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:29:18,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 95 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:29:18,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9483 states. [2022-02-24 04:29:19,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9483 to 7689. [2022-02-24 04:29:19,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7689 states, 7685 states have (on average 1.5078724788549123) internal successors, (11588), 7685 states have internal predecessors, (11588), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:19,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7689 states to 7689 states and 11591 transitions. [2022-02-24 04:29:19,259 INFO L78 Accepts]: Start accepts. Automaton has 7689 states and 11591 transitions. Word has length 32 [2022-02-24 04:29:19,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:19,259 INFO L470 AbstractCegarLoop]: Abstraction has 7689 states and 11591 transitions. [2022-02-24 04:29:19,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:19,260 INFO L276 IsEmpty]: Start isEmpty. Operand 7689 states and 11591 transitions. [2022-02-24 04:29:19,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 04:29:19,268 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:19,268 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, 1, 1] [2022-02-24 04:29:19,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 04:29:19,269 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:19,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:19,269 INFO L85 PathProgramCache]: Analyzing trace with hash 2019009917, now seen corresponding path program 1 times [2022-02-24 04:29:19,269 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:19,269 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767453268] [2022-02-24 04:29:19,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:19,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:19,270 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:19,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:19,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:19,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:19,307 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:19,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767453268] [2022-02-24 04:29:19,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1767453268] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:19,307 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:19,307 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:19,308 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320793612] [2022-02-24 04:29:19,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:19,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:19,308 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:19,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:19,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:19,308 INFO L87 Difference]: Start difference. First operand 7689 states and 11591 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:20,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:20,119 INFO L93 Difference]: Finished difference Result 17933 states and 27209 transitions. [2022-02-24 04:29:20,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:20,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-24 04:29:20,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:20,139 INFO L225 Difference]: With dead ends: 17933 [2022-02-24 04:29:20,139 INFO L226 Difference]: Without dead ends: 10379 [2022-02-24 04:29:20,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:20,153 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 166 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:29:20,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 141 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:29:20,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10379 states. [2022-02-24 04:29:20,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10379 to 10377. [2022-02-24 04:29:20,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10377 states, 10373 states have (on average 1.5058324496288442) internal successors, (15620), 10373 states have internal predecessors, (15620), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:20,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10377 states to 10377 states and 15623 transitions. [2022-02-24 04:29:20,943 INFO L78 Accepts]: Start accepts. Automaton has 10377 states and 15623 transitions. Word has length 32 [2022-02-24 04:29:20,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:20,943 INFO L470 AbstractCegarLoop]: Abstraction has 10377 states and 15623 transitions. [2022-02-24 04:29:20,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:20,943 INFO L276 IsEmpty]: Start isEmpty. Operand 10377 states and 15623 transitions. [2022-02-24 04:29:20,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 04:29:20,950 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:20,950 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, 1, 1, 1] [2022-02-24 04:29:20,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 04:29:20,951 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:20,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:20,951 INFO L85 PathProgramCache]: Analyzing trace with hash 159157167, now seen corresponding path program 1 times [2022-02-24 04:29:20,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:20,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271360078] [2022-02-24 04:29:20,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:20,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:20,952 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:20,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:20,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:20,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:20,967 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:20,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271360078] [2022-02-24 04:29:20,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1271360078] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:20,968 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:20,968 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:20,968 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792133676] [2022-02-24 04:29:20,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:20,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:20,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:20,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:20,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:20,968 INFO L87 Difference]: Start difference. First operand 10377 states and 15623 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:21,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:21,971 INFO L93 Difference]: Finished difference Result 15565 states and 23369 transitions. [2022-02-24 04:29:21,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:21,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-24 04:29:21,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:21,988 INFO L225 Difference]: With dead ends: 15565 [2022-02-24 04:29:21,989 INFO L226 Difference]: Without dead ends: 10507 [2022-02-24 04:29:22,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:22,002 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 176 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:29:22,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 132 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:29:22,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10507 states. [2022-02-24 04:29:22,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10507 to 10505. [2022-02-24 04:29:22,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10505 states, 10501 states have (on average 1.4874773831063708) internal successors, (15620), 10501 states have internal predecessors, (15620), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:22,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10505 states to 10505 states and 15623 transitions. [2022-02-24 04:29:22,851 INFO L78 Accepts]: Start accepts. Automaton has 10505 states and 15623 transitions. Word has length 33 [2022-02-24 04:29:22,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:22,851 INFO L470 AbstractCegarLoop]: Abstraction has 10505 states and 15623 transitions. [2022-02-24 04:29:22,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:22,851 INFO L276 IsEmpty]: Start isEmpty. Operand 10505 states and 15623 transitions. [2022-02-24 04:29:22,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 04:29:22,858 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:22,858 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, 1, 1, 1] [2022-02-24 04:29:22,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 04:29:22,858 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:22,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:22,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1834987539, now seen corresponding path program 1 times [2022-02-24 04:29:22,859 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:22,859 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303751093] [2022-02-24 04:29:22,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:22,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:22,860 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:22,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:22,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:22,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:22,881 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:22,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303751093] [2022-02-24 04:29:22,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [303751093] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:22,882 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:22,882 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:22,882 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661146120] [2022-02-24 04:29:22,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:22,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:22,883 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:22,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:22,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:22,884 INFO L87 Difference]: Start difference. First operand 10505 states and 15623 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:24,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:24,326 INFO L93 Difference]: Finished difference Result 18445 states and 28041 transitions. [2022-02-24 04:29:24,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:24,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-24 04:29:24,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:24,357 INFO L225 Difference]: With dead ends: 18445 [2022-02-24 04:29:24,357 INFO L226 Difference]: Without dead ends: 18443 [2022-02-24 04:29:24,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:24,365 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 180 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:29:24,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 94 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:29:24,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18443 states. [2022-02-24 04:29:25,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18443 to 15369. [2022-02-24 04:29:25,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15369 states, 15365 states have (on average 1.4414578587699316) internal successors, (22148), 15365 states have internal predecessors, (22148), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:25,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15369 states to 15369 states and 22151 transitions. [2022-02-24 04:29:25,590 INFO L78 Accepts]: Start accepts. Automaton has 15369 states and 22151 transitions. Word has length 33 [2022-02-24 04:29:25,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:25,590 INFO L470 AbstractCegarLoop]: Abstraction has 15369 states and 22151 transitions. [2022-02-24 04:29:25,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:25,590 INFO L276 IsEmpty]: Start isEmpty. Operand 15369 states and 22151 transitions. [2022-02-24 04:29:25,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 04:29:25,604 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:25,604 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, 1, 1, 1] [2022-02-24 04:29:25,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 04:29:25,604 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:25,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:25,605 INFO L85 PathProgramCache]: Analyzing trace with hash 871631855, now seen corresponding path program 1 times [2022-02-24 04:29:25,605 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:25,605 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916198181] [2022-02-24 04:29:25,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:25,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:25,606 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:25,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:25,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:25,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:25,623 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:25,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916198181] [2022-02-24 04:29:25,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [916198181] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:25,623 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:25,623 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:25,623 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252156403] [2022-02-24 04:29:25,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:25,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:25,623 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:25,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:25,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:25,624 INFO L87 Difference]: Start difference. First operand 15369 states and 22151 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:27,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:27,460 INFO L93 Difference]: Finished difference Result 35597 states and 51593 transitions. [2022-02-24 04:29:27,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:27,460 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-24 04:29:27,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:27,492 INFO L225 Difference]: With dead ends: 35597 [2022-02-24 04:29:27,492 INFO L226 Difference]: Without dead ends: 20491 [2022-02-24 04:29:27,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:27,523 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 160 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:29:27,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 143 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:29:27,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20491 states. [2022-02-24 04:29:29,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20491 to 20489. [2022-02-24 04:29:29,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20489 states, 20485 states have (on average 1.437344398340249) internal successors, (29444), 20485 states have internal predecessors, (29444), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:29,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20489 states to 20489 states and 29447 transitions. [2022-02-24 04:29:29,296 INFO L78 Accepts]: Start accepts. Automaton has 20489 states and 29447 transitions. Word has length 33 [2022-02-24 04:29:29,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:29,296 INFO L470 AbstractCegarLoop]: Abstraction has 20489 states and 29447 transitions. [2022-02-24 04:29:29,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:29,296 INFO L276 IsEmpty]: Start isEmpty. Operand 20489 states and 29447 transitions. [2022-02-24 04:29:29,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 04:29:29,308 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:29,308 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, 1, 1, 1, 1] [2022-02-24 04:29:29,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 04:29:29,308 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:29,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:29,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1049824046, now seen corresponding path program 1 times [2022-02-24 04:29:29,309 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:29,309 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776608021] [2022-02-24 04:29:29,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:29,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:29,310 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:29,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:29,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:29,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:29,325 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:29,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776608021] [2022-02-24 04:29:29,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1776608021] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:29,325 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:29,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:29,325 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470243601] [2022-02-24 04:29:29,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:29,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:29,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:29,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:29,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:29,326 INFO L87 Difference]: Start difference. First operand 20489 states and 29447 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:31,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:31,024 INFO L93 Difference]: Finished difference Result 30733 states and 44041 transitions. [2022-02-24 04:29:31,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:31,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-24 04:29:31,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:31,056 INFO L225 Difference]: With dead ends: 30733 [2022-02-24 04:29:31,056 INFO L226 Difference]: Without dead ends: 20747 [2022-02-24 04:29:31,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:31,077 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 175 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:29:31,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 129 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:29:31,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20747 states. [2022-02-24 04:29:32,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20747 to 20745. [2022-02-24 04:29:32,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20745 states, 20741 states have (on average 1.4196036835253845) internal successors, (29444), 20741 states have internal predecessors, (29444), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:32,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20745 states to 20745 states and 29447 transitions. [2022-02-24 04:29:32,920 INFO L78 Accepts]: Start accepts. Automaton has 20745 states and 29447 transitions. Word has length 34 [2022-02-24 04:29:32,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:32,920 INFO L470 AbstractCegarLoop]: Abstraction has 20745 states and 29447 transitions. [2022-02-24 04:29:32,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:32,921 INFO L276 IsEmpty]: Start isEmpty. Operand 20745 states and 29447 transitions. [2022-02-24 04:29:32,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 04:29:32,933 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:32,933 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, 1, 1, 1, 1] [2022-02-24 04:29:32,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 04:29:32,934 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:32,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:32,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1250998544, now seen corresponding path program 1 times [2022-02-24 04:29:32,934 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:32,934 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497533473] [2022-02-24 04:29:32,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:32,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:32,936 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:32,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:32,956 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:32,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497533473] [2022-02-24 04:29:32,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [497533473] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:32,956 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:32,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:32,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526635029] [2022-02-24 04:29:32,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:32,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:32,958 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:32,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:32,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:32,958 INFO L87 Difference]: Start difference. First operand 20745 states and 29447 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:36,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:36,202 INFO L93 Difference]: Finished difference Result 60685 states and 85257 transitions. [2022-02-24 04:29:36,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:36,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-24 04:29:36,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:36,266 INFO L225 Difference]: With dead ends: 60685 [2022-02-24 04:29:36,266 INFO L226 Difference]: Without dead ends: 40459 [2022-02-24 04:29:36,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:36,307 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 191 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:29:36,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 111 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:29:36,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40459 states. [2022-02-24 04:29:39,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40459 to 40457. [2022-02-24 04:29:39,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40457 states, 40453 states have (on average 1.3796751786023287) internal successors, (55812), 40453 states have internal predecessors, (55812), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:39,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40457 states to 40457 states and 55815 transitions. [2022-02-24 04:29:39,972 INFO L78 Accepts]: Start accepts. Automaton has 40457 states and 55815 transitions. Word has length 34 [2022-02-24 04:29:39,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:39,973 INFO L470 AbstractCegarLoop]: Abstraction has 40457 states and 55815 transitions. [2022-02-24 04:29:39,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:39,973 INFO L276 IsEmpty]: Start isEmpty. Operand 40457 states and 55815 transitions. [2022-02-24 04:29:39,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 04:29:39,992 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:39,992 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, 1, 1, 1, 1] [2022-02-24 04:29:39,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 04:29:39,993 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:39,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:39,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1455620850, now seen corresponding path program 1 times [2022-02-24 04:29:39,993 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:39,993 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997075974] [2022-02-24 04:29:39,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:39,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:39,994 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:39,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:40,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:40,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:40,008 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:40,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997075974] [2022-02-24 04:29:40,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1997075974] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:40,009 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:40,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:40,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938808939] [2022-02-24 04:29:40,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:40,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:40,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:40,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:40,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:40,010 INFO L87 Difference]: Start difference. First operand 40457 states and 55815 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:43,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:43,960 INFO L93 Difference]: Finished difference Result 45581 states and 65033 transitions. [2022-02-24 04:29:43,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:43,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-24 04:29:43,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:44,029 INFO L225 Difference]: With dead ends: 45581 [2022-02-24 04:29:44,029 INFO L226 Difference]: Without dead ends: 45579 [2022-02-24 04:29:44,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:44,045 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 118 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:29:44,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 144 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:29:44,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45579 states. [2022-02-24 04:29:47,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45579 to 40457. [2022-02-24 04:29:47,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40457 states, 40453 states have (on average 1.3670185153140681) internal successors, (55300), 40453 states have internal predecessors, (55300), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:47,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40457 states to 40457 states and 55303 transitions. [2022-02-24 04:29:47,657 INFO L78 Accepts]: Start accepts. Automaton has 40457 states and 55303 transitions. Word has length 34 [2022-02-24 04:29:47,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:47,657 INFO L470 AbstractCegarLoop]: Abstraction has 40457 states and 55303 transitions. [2022-02-24 04:29:47,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:47,657 INFO L276 IsEmpty]: Start isEmpty. Operand 40457 states and 55303 transitions. [2022-02-24 04:29:47,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-24 04:29:47,677 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:47,677 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, 1, 1, 1, 1, 1] [2022-02-24 04:29:47,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 04:29:47,677 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:47,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:47,678 INFO L85 PathProgramCache]: Analyzing trace with hash 126464356, now seen corresponding path program 1 times [2022-02-24 04:29:47,678 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:47,678 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659198449] [2022-02-24 04:29:47,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:47,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:47,679 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:47,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:47,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:47,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:47,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:47,694 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:47,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659198449] [2022-02-24 04:29:47,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [659198449] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:47,694 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:47,694 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:47,694 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299586632] [2022-02-24 04:29:47,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:47,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:47,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:47,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:47,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:47,695 INFO L87 Difference]: Start difference. First operand 40457 states and 55303 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:53,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:53,916 INFO L93 Difference]: Finished difference Result 69133 states and 96265 transitions. [2022-02-24 04:29:53,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:53,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-02-24 04:29:53,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:54,029 INFO L225 Difference]: With dead ends: 69133 [2022-02-24 04:29:54,030 INFO L226 Difference]: Without dead ends: 69131 [2022-02-24 04:29:54,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:54,053 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 166 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:29:54,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 92 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:29:54,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69131 states. [2022-02-24 04:29:59,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69131 to 60937. [2022-02-24 04:29:59,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60937 states, 60933 states have (on average 1.3276877882264126) internal successors, (80900), 60933 states have internal predecessors, (80900), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:59,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60937 states to 60937 states and 80903 transitions. [2022-02-24 04:29:59,818 INFO L78 Accepts]: Start accepts. Automaton has 60937 states and 80903 transitions. Word has length 35 [2022-02-24 04:29:59,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:59,818 INFO L470 AbstractCegarLoop]: Abstraction has 60937 states and 80903 transitions. [2022-02-24 04:29:59,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:59,818 INFO L276 IsEmpty]: Start isEmpty. Operand 60937 states and 80903 transitions. [2022-02-24 04:29:59,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-24 04:29:59,858 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:59,859 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, 1, 1, 1, 1, 1] [2022-02-24 04:29:59,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 04:29:59,859 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:59,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:59,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1461883546, now seen corresponding path program 1 times [2022-02-24 04:29:59,859 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:59,859 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154779581] [2022-02-24 04:29:59,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:59,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:59,860 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:59,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:59,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:59,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:59,876 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:59,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154779581] [2022-02-24 04:29:59,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [154779581] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:59,876 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:59,876 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:59,876 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921526924] [2022-02-24 04:29:59,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:59,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:59,877 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:59,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:59,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:59,877 INFO L87 Difference]: Start difference. First operand 60937 states and 80903 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:30:07,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:30:07,141 INFO L93 Difference]: Finished difference Result 139789 states and 186377 transitions. [2022-02-24 04:30:07,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:30:07,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-02-24 04:30:07,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:30:07,310 INFO L225 Difference]: With dead ends: 139789 [2022-02-24 04:30:07,310 INFO L226 Difference]: Without dead ends: 79371 [2022-02-24 04:30:07,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:30:07,382 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 148 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:30:07,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 147 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:30:07,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79371 states. [2022-02-24 04:30:14,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79371 to 79369. [2022-02-24 04:30:14,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79369 states, 79365 states have (on average 1.3160965160965161) internal successors, (104452), 79365 states have internal predecessors, (104452), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:30:14,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79369 states to 79369 states and 104455 transitions. [2022-02-24 04:30:14,896 INFO L78 Accepts]: Start accepts. Automaton has 79369 states and 104455 transitions. Word has length 35 [2022-02-24 04:30:14,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:30:14,896 INFO L470 AbstractCegarLoop]: Abstraction has 79369 states and 104455 transitions. [2022-02-24 04:30:14,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:30:14,896 INFO L276 IsEmpty]: Start isEmpty. Operand 79369 states and 104455 transitions. [2022-02-24 04:30:14,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 04:30:14,942 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:30:14,942 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, 1, 1, 1, 1, 1, 1] [2022-02-24 04:30:14,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 04:30:14,943 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:30:14,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:30:14,943 INFO L85 PathProgramCache]: Analyzing trace with hash -374356763, now seen corresponding path program 1 times [2022-02-24 04:30:14,943 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:30:14,943 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857752640] [2022-02-24 04:30:14,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:30:14,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:30:14,944 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:30:14,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:30:14,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:30:14,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:30:14,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:30:14,966 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:30:14,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857752640] [2022-02-24 04:30:14,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [857752640] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:30:14,966 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:30:14,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:30:14,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185443851] [2022-02-24 04:30:14,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:30:14,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:30:14,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:30:14,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:30:14,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:30:14,967 INFO L87 Difference]: Start difference. First operand 79369 states and 104455 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:30:22,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:30:22,237 INFO L93 Difference]: Finished difference Result 119821 states and 157705 transitions. [2022-02-24 04:30:22,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:30:22,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-24 04:30:22,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:30:22,370 INFO L225 Difference]: With dead ends: 119821 [2022-02-24 04:30:22,370 INFO L226 Difference]: Without dead ends: 80907 [2022-02-24 04:30:22,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:30:22,434 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 173 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:30:22,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 123 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:30:22,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80907 states. [2022-02-24 04:30:29,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80907 to 80905. [2022-02-24 04:30:30,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80905 states, 80901 states have (on average 1.3037663316893486) internal successors, (105476), 80901 states have internal predecessors, (105476), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:30:30,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80905 states to 80905 states and 105479 transitions. [2022-02-24 04:30:30,169 INFO L78 Accepts]: Start accepts. Automaton has 80905 states and 105479 transitions. Word has length 36 [2022-02-24 04:30:30,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:30:30,169 INFO L470 AbstractCegarLoop]: Abstraction has 80905 states and 105479 transitions. [2022-02-24 04:30:30,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:30:30,170 INFO L276 IsEmpty]: Start isEmpty. Operand 80905 states and 105479 transitions. [2022-02-24 04:30:30,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 04:30:30,222 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:30:30,222 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, 1, 1, 1, 1, 1, 1] [2022-02-24 04:30:30,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 04:30:30,222 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:30:30,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:30:30,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1926465827, now seen corresponding path program 1 times [2022-02-24 04:30:30,222 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:30:30,223 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165260746] [2022-02-24 04:30:30,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:30:30,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:30:30,224 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:30:30,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:30:30,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:30:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:30:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:30:30,249 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:30:30,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165260746] [2022-02-24 04:30:30,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1165260746] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:30:30,249 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:30:30,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:30:30,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140890397] [2022-02-24 04:30:30,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:30:30,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:30:30,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:30:30,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:30:30,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:30:30,250 INFO L87 Difference]: Start difference. First operand 80905 states and 105479 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:30:43,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:30:43,277 INFO L93 Difference]: Finished difference Result 135181 states and 178185 transitions. [2022-02-24 04:30:43,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:30:43,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-24 04:30:43,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:30:43,559 INFO L225 Difference]: With dead ends: 135181 [2022-02-24 04:30:43,560 INFO L226 Difference]: Without dead ends: 135179 [2022-02-24 04:30:43,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:30:43,603 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 159 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:30:43,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 91 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:30:43,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135179 states. [2022-02-24 04:30:55,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135179 to 122889. [2022-02-24 04:30:56,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122889 states, 122885 states have (on average 1.2666476787240102) internal successors, (155652), 122885 states have internal predecessors, (155652), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:30:56,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122889 states to 122889 states and 155655 transitions. [2022-02-24 04:30:56,394 INFO L78 Accepts]: Start accepts. Automaton has 122889 states and 155655 transitions. Word has length 36 [2022-02-24 04:30:56,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:30:56,395 INFO L470 AbstractCegarLoop]: Abstraction has 122889 states and 155655 transitions. [2022-02-24 04:30:56,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:30:56,395 INFO L276 IsEmpty]: Start isEmpty. Operand 122889 states and 155655 transitions. [2022-02-24 04:30:56,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 04:30:56,489 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:30:56,489 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, 1, 1, 1, 1, 1, 1] [2022-02-24 04:30:56,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 04:30:56,489 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:30:56,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:30:56,490 INFO L85 PathProgramCache]: Analyzing trace with hash 338117925, now seen corresponding path program 1 times [2022-02-24 04:30:56,490 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:30:56,490 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014889481] [2022-02-24 04:30:56,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:30:56,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:30:56,491 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:30:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:30:56,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:30:56,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:30:56,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:30:56,521 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:30:56,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014889481] [2022-02-24 04:30:56,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2014889481] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:30:56,521 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:30:56,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:30:56,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649849111] [2022-02-24 04:30:56,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:30:56,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:30:56,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:30:56,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:30:56,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:30:56,522 INFO L87 Difference]: Start difference. First operand 122889 states and 155655 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:31:12,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:31:12,145 INFO L93 Difference]: Finished difference Result 278541 states and 352265 transitions. [2022-02-24 04:31:12,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:31:12,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-24 04:31:12,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:31:12,537 INFO L225 Difference]: With dead ends: 278541 [2022-02-24 04:31:12,537 INFO L226 Difference]: Without dead ends: 157707 [2022-02-24 04:31:12,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:31:12,706 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:31:12,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 149 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:31:13,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157707 states. [2022-02-24 04:31:28,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157707 to 157705. [2022-02-24 04:31:28,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157705 states, 157701 states have (on average 1.246739082187177) internal successors, (196612), 157701 states have internal predecessors, (196612), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:31:28,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157705 states to 157705 states and 196615 transitions. [2022-02-24 04:31:28,873 INFO L78 Accepts]: Start accepts. Automaton has 157705 states and 196615 transitions. Word has length 36 [2022-02-24 04:31:28,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:31:28,873 INFO L470 AbstractCegarLoop]: Abstraction has 157705 states and 196615 transitions. [2022-02-24 04:31:28,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:31:28,874 INFO L276 IsEmpty]: Start isEmpty. Operand 157705 states and 196615 transitions. [2022-02-24 04:31:28,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-24 04:31:28,999 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:31:28,999 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, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:31:28,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 04:31:28,999 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:31:28,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:31:28,999 INFO L85 PathProgramCache]: Analyzing trace with hash -408885669, now seen corresponding path program 1 times [2022-02-24 04:31:29,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:31:29,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746811382] [2022-02-24 04:31:29,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:31:29,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:31:29,001 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:31:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:31:29,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:31:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:31:29,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:31:29,035 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:31:29,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746811382] [2022-02-24 04:31:29,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1746811382] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:31:29,035 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:31:29,035 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:31:29,035 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069207588] [2022-02-24 04:31:29,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:31:29,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:31:29,035 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:31:29,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:31:29,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:31:29,036 INFO L87 Difference]: Start difference. First operand 157705 states and 196615 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:31:44,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:31:44,715 INFO L93 Difference]: Finished difference Result 236557 states and 293897 transitions. [2022-02-24 04:31:44,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:31:44,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-02-24 04:31:44,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:31:45,106 INFO L225 Difference]: With dead ends: 236557 [2022-02-24 04:31:45,106 INFO L226 Difference]: Without dead ends: 159755 [2022-02-24 04:31:45,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:31:45,235 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 172 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:31:45,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 120 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:31:45,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159755 states.