/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/locks/test_locks_14-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 22:17:06,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 22:17:06,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 22:17:06,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 22:17:06,506 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 22:17:06,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 22:17:06,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 22:17:06,507 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 22:17:06,508 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 22:17:06,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 22:17:06,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 22:17:06,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 22:17:06,511 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 22:17:06,517 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 22:17:06,518 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 22:17:06,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 22:17:06,520 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 22:17:06,524 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 22:17:06,525 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 22:17:06,525 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 22:17:06,529 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 22:17:06,538 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 22:17:06,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 22:17:06,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 22:17:06,541 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 22:17:06,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 22:17:06,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 22:17:06,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 22:17:06,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 22:17:06,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 22:17:06,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 22:17:06,542 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 22:17:06,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 22:17:06,542 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 22:17:06,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 22:17:06,542 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 22:17:06,542 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 22:17:06,542 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 22:17:06,542 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 22:17:06,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 22:17:06,542 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 22:17:06,542 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 22:17:06,543 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 22:17:06,543 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 22:17:06,543 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 22:17:06,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 22:17:06,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 22:17:06,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 22:17:06,763 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 22:17:06,763 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 22:17:06,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_14-1.c [2022-01-31 22:17:06,809 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/560ada064/d2937b1856bd4850a9f54ea263f4bb10/FLAG46040fc8e [2022-01-31 22:17:07,140 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 22:17:07,140 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_14-1.c [2022-01-31 22:17:07,145 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/560ada064/d2937b1856bd4850a9f54ea263f4bb10/FLAG46040fc8e [2022-01-31 22:17:07,159 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/560ada064/d2937b1856bd4850a9f54ea263f4bb10 [2022-01-31 22:17:07,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 22:17:07,161 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 22:17:07,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 22:17:07,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 22:17:07,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 22:17:07,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:17:07" (1/1) ... [2022-01-31 22:17:07,165 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b981ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:17:07, skipping insertion in model container [2022-01-31 22:17:07,165 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:17:07" (1/1) ... [2022-01-31 22:17:07,169 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 22:17:07,180 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 22:17:07,364 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] [2022-01-31 22:17:07,372 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 22:17:07,378 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 22:17:07,420 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] [2022-01-31 22:17:07,421 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 22:17:07,445 INFO L208 MainTranslator]: Completed translation [2022-01-31 22:17:07,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:17:07 WrapperNode [2022-01-31 22:17:07,446 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 22:17:07,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 22:17:07,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 22:17:07,447 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 22:17:07,469 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:17:07" (1/1) ... [2022-01-31 22:17:07,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:17:07" (1/1) ... [2022-01-31 22:17:07,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:17:07" (1/1) ... [2022-01-31 22:17:07,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:17:07" (1/1) ... [2022-01-31 22:17:07,480 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:17:07" (1/1) ... [2022-01-31 22:17:07,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:17:07" (1/1) ... [2022-01-31 22:17:07,500 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:17:07" (1/1) ... [2022-01-31 22:17:07,501 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 22:17:07,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 22:17:07,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 22:17:07,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 22:17:07,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:17:07" (1/1) ... [2022-01-31 22:17:07,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 22:17:07,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 22:17:07,541 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 22:17:07,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 22:17:07,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 22:17:07,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 22:17:07,580 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 22:17:07,580 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 22:17:07,580 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 22:17:07,580 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 22:17:07,580 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 22:17:07,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 22:17:07,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 22:17:07,580 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 22:17:07,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 22:17:07,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 22:17:07,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 22:17:07,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 22:17:07,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 22:17:07,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 22:17:07,654 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 22:17:07,655 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 22:17:07,852 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 22:17:07,856 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 22:17:07,856 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 22:17:07,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:17:07 BoogieIcfgContainer [2022-01-31 22:17:07,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 22:17:07,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 22:17:07,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 22:17:07,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 22:17:07,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 10:17:07" (1/3) ... [2022-01-31 22:17:07,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b77b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:17:07, skipping insertion in model container [2022-01-31 22:17:07,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:17:07" (2/3) ... [2022-01-31 22:17:07,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b77b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:17:07, skipping insertion in model container [2022-01-31 22:17:07,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:17:07" (3/3) ... [2022-01-31 22:17:07,862 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_14-1.c [2022-01-31 22:17:07,865 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 22:17:07,865 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 22:17:07,894 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 22:17:07,904 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-01-31 22:17:07,905 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 22:17:07,917 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) [2022-01-31 22:17:07,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 22:17:07,921 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:17:07,922 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] [2022-01-31 22:17:07,922 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:17:07,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:17:07,925 INFO L85 PathProgramCache]: Analyzing trace with hash -406532905, now seen corresponding path program 1 times [2022-01-31 22:17:07,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:17:07,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562530511] [2022-01-31 22:17:07,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:17:07,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:17:07,966 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:17:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:08,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:17:08,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:08,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:17:08,110 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:17:08,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562530511] [2022-01-31 22:17:08,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1562530511] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:17:08,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:17:08,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:17:08,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548466269] [2022-01-31 22:17:08,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:17:08,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:17:08,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:17:08,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:17:08,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:17:08,138 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) [2022-01-31 22:17:08,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:17:08,321 INFO L93 Difference]: Finished difference Result 112 states and 199 transitions. [2022-01-31 22:17:08,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:17:08,323 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 [2022-01-31 22:17:08,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:17:08,329 INFO L225 Difference]: With dead ends: 112 [2022-01-31 22:17:08,329 INFO L226 Difference]: Without dead ends: 97 [2022-01-31 22:17:08,330 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 [2022-01-31 22:17:08,332 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 [2022-01-31 22:17:08,333 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] [2022-01-31 22:17:08,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-31 22:17:08,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 67. [2022-01-31 22:17:08,363 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) [2022-01-31 22:17:08,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 122 transitions. [2022-01-31 22:17:08,365 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 122 transitions. Word has length 25 [2022-01-31 22:17:08,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:17:08,365 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 122 transitions. [2022-01-31 22:17:08,366 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) [2022-01-31 22:17:08,366 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 122 transitions. [2022-01-31 22:17:08,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 22:17:08,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:17:08,366 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] [2022-01-31 22:17:08,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 22:17:08,367 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:17:08,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:17:08,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1994880807, now seen corresponding path program 1 times [2022-01-31 22:17:08,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:17:08,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066980018] [2022-01-31 22:17:08,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:17:08,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:17:08,370 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:17:08,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:08,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:17:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:08,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:17:08,414 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:17:08,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066980018] [2022-01-31 22:17:08,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1066980018] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:17:08,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:17:08,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:17:08,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870219009] [2022-01-31 22:17:08,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:17:08,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:17:08,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:17:08,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:17:08,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:17:08,416 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) [2022-01-31 22:17:08,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:17:08,509 INFO L93 Difference]: Finished difference Result 158 states and 293 transitions. [2022-01-31 22:17:08,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:17:08,510 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 [2022-01-31 22:17:08,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:17:08,511 INFO L225 Difference]: With dead ends: 158 [2022-01-31 22:17:08,511 INFO L226 Difference]: Without dead ends: 97 [2022-01-31 22:17:08,512 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 [2022-01-31 22:17:08,513 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 [2022-01-31 22:17:08,514 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] [2022-01-31 22:17:08,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-31 22:17:08,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2022-01-31 22:17:08,524 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) [2022-01-31 22:17:08,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 174 transitions. [2022-01-31 22:17:08,525 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 174 transitions. Word has length 25 [2022-01-31 22:17:08,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:17:08,526 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 174 transitions. [2022-01-31 22:17:08,526 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) [2022-01-31 22:17:08,526 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 174 transitions. [2022-01-31 22:17:08,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 22:17:08,526 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:17:08,526 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] [2022-01-31 22:17:08,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 22:17:08,527 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:17:08,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:17:08,527 INFO L85 PathProgramCache]: Analyzing trace with hash 282593920, now seen corresponding path program 1 times [2022-01-31 22:17:08,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:17:08,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941919799] [2022-01-31 22:17:08,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:17:08,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:17:08,529 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:17:08,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:08,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:17:08,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:08,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:17:08,570 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:17:08,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941919799] [2022-01-31 22:17:08,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [941919799] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:17:08,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:17:08,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:17:08,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037832873] [2022-01-31 22:17:08,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:17:08,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:17:08,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:17:08,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:17:08,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:17:08,571 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) [2022-01-31 22:17:08,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:17:08,654 INFO L93 Difference]: Finished difference Result 145 states and 262 transitions. [2022-01-31 22:17:08,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:17:08,654 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 [2022-01-31 22:17:08,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:17:08,655 INFO L225 Difference]: With dead ends: 145 [2022-01-31 22:17:08,655 INFO L226 Difference]: Without dead ends: 100 [2022-01-31 22:17:08,656 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 [2022-01-31 22:17:08,656 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 [2022-01-31 22:17:08,657 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] [2022-01-31 22:17:08,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-31 22:17:08,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2022-01-31 22:17:08,665 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) [2022-01-31 22:17:08,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 176 transitions. [2022-01-31 22:17:08,679 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 176 transitions. Word has length 26 [2022-01-31 22:17:08,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:17:08,679 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 176 transitions. [2022-01-31 22:17:08,680 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) [2022-01-31 22:17:08,680 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 176 transitions. [2022-01-31 22:17:08,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 22:17:08,680 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:17:08,680 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] [2022-01-31 22:17:08,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 22:17:08,681 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:17:08,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:17:08,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1711550786, now seen corresponding path program 1 times [2022-01-31 22:17:08,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:17:08,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158672067] [2022-01-31 22:17:08,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:17:08,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:17:08,683 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:17:08,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:08,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:17:08,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:08,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:17:08,740 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:17:08,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158672067] [2022-01-31 22:17:08,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [158672067] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:17:08,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:17:08,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:17:08,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828622614] [2022-01-31 22:17:08,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:17:08,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:17:08,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:17:08,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:17:08,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:17:08,742 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) [2022-01-31 22:17:08,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:17:08,835 INFO L93 Difference]: Finished difference Result 274 states and 504 transitions. [2022-01-31 22:17:08,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:17:08,835 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 [2022-01-31 22:17:08,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:17:08,836 INFO L225 Difference]: With dead ends: 274 [2022-01-31 22:17:08,837 INFO L226 Difference]: Without dead ends: 185 [2022-01-31 22:17:08,837 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 [2022-01-31 22:17:08,838 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 [2022-01-31 22:17:08,838 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] [2022-01-31 22:17:08,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-01-31 22:17:08,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2022-01-31 22:17:08,853 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) [2022-01-31 22:17:08,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 333 transitions. [2022-01-31 22:17:08,892 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 333 transitions. Word has length 26 [2022-01-31 22:17:08,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:17:08,892 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 333 transitions. [2022-01-31 22:17:08,892 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) [2022-01-31 22:17:08,892 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 333 transitions. [2022-01-31 22:17:08,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 22:17:08,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:17:08,897 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] [2022-01-31 22:17:08,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 22:17:08,897 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:17:08,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:17:08,898 INFO L85 PathProgramCache]: Analyzing trace with hash -123202884, now seen corresponding path program 1 times [2022-01-31 22:17:08,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:17:08,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163887877] [2022-01-31 22:17:08,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:17:08,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:17:08,901 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:17:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:08,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:17:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:08,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:17:08,957 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:17:08,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163887877] [2022-01-31 22:17:08,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1163887877] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:17:08,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:17:08,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:17:08,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239442881] [2022-01-31 22:17:08,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:17:08,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:17:08,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:17:08,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:17:08,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:17:08,960 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) [2022-01-31 22:17:09,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:17:09,052 INFO L93 Difference]: Finished difference Result 239 states and 435 transitions. [2022-01-31 22:17:09,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:17:09,052 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 [2022-01-31 22:17:09,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:17:09,053 INFO L225 Difference]: With dead ends: 239 [2022-01-31 22:17:09,053 INFO L226 Difference]: Without dead ends: 237 [2022-01-31 22:17:09,054 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 [2022-01-31 22:17:09,056 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 [2022-01-31 22:17:09,057 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] [2022-01-31 22:17:09,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-01-31 22:17:09,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 183. [2022-01-31 22:17:09,082 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) [2022-01-31 22:17:09,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 331 transitions. [2022-01-31 22:17:09,084 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 331 transitions. Word has length 26 [2022-01-31 22:17:09,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:17:09,086 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 331 transitions. [2022-01-31 22:17:09,086 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) [2022-01-31 22:17:09,090 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 331 transitions. [2022-01-31 22:17:09,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 22:17:09,091 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:17:09,091 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] [2022-01-31 22:17:09,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 22:17:09,091 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:17:09,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:17:09,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1518254386, now seen corresponding path program 1 times [2022-01-31 22:17:09,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:17:09,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327563841] [2022-01-31 22:17:09,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:17:09,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:17:09,093 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:17:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:09,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:17:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:09,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:17:09,119 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:17:09,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327563841] [2022-01-31 22:17:09,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1327563841] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:17:09,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:17:09,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:17:09,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182845488] [2022-01-31 22:17:09,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:17:09,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:17:09,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:17:09,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:17:09,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:17:09,121 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) [2022-01-31 22:17:09,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:17:09,214 INFO L93 Difference]: Finished difference Result 347 states and 635 transitions. [2022-01-31 22:17:09,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:17:09,214 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 [2022-01-31 22:17:09,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:17:09,216 INFO L225 Difference]: With dead ends: 347 [2022-01-31 22:17:09,216 INFO L226 Difference]: Without dead ends: 345 [2022-01-31 22:17:09,216 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 [2022-01-31 22:17:09,216 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 [2022-01-31 22:17:09,217 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] [2022-01-31 22:17:09,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-01-31 22:17:09,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 247. [2022-01-31 22:17:09,230 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) [2022-01-31 22:17:09,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 445 transitions. [2022-01-31 22:17:09,231 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 445 transitions. Word has length 27 [2022-01-31 22:17:09,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:17:09,231 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 445 transitions. [2022-01-31 22:17:09,231 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) [2022-01-31 22:17:09,232 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 445 transitions. [2022-01-31 22:17:09,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 22:17:09,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:17:09,232 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] [2022-01-31 22:17:09,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 22:17:09,232 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:17:09,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:17:09,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1188365008, now seen corresponding path program 1 times [2022-01-31 22:17:09,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:17:09,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319821951] [2022-01-31 22:17:09,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:17:09,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:17:09,234 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:17:09,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:09,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:17:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:09,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:17:09,267 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:17:09,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319821951] [2022-01-31 22:17:09,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1319821951] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:17:09,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:17:09,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:17:09,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556520131] [2022-01-31 22:17:09,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:17:09,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:17:09,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:17:09,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:17:09,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:17:09,268 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) [2022-01-31 22:17:09,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:17:09,358 INFO L93 Difference]: Finished difference Result 591 states and 1075 transitions. [2022-01-31 22:17:09,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:17:09,358 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 [2022-01-31 22:17:09,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:17:09,359 INFO L225 Difference]: With dead ends: 591 [2022-01-31 22:17:09,359 INFO L226 Difference]: Without dead ends: 353 [2022-01-31 22:17:09,360 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 [2022-01-31 22:17:09,361 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 196 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-01-31 22:17:09,361 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] [2022-01-31 22:17:09,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-01-31 22:17:09,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 351. [2022-01-31 22:17:09,383 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) [2022-01-31 22:17:09,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 631 transitions. [2022-01-31 22:17:09,384 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 631 transitions. Word has length 27 [2022-01-31 22:17:09,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:17:09,384 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 631 transitions. [2022-01-31 22:17:09,384 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) [2022-01-31 22:17:09,384 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 631 transitions. [2022-01-31 22:17:09,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 22:17:09,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:17:09,386 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] [2022-01-31 22:17:09,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 22:17:09,386 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:17:09,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:17:09,386 INFO L85 PathProgramCache]: Analyzing trace with hash 178967059, now seen corresponding path program 1 times [2022-01-31 22:17:09,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:17:09,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517819591] [2022-01-31 22:17:09,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:17:09,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:17:09,389 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:17:09,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:09,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:17:09,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:09,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:17:09,431 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:17:09,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517819591] [2022-01-31 22:17:09,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [517819591] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:17:09,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:17:09,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:17:09,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078572256] [2022-01-31 22:17:09,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:17:09,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:17:09,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:17:09,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:17:09,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:17:09,432 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) [2022-01-31 22:17:09,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:17:09,518 INFO L93 Difference]: Finished difference Result 529 states and 949 transitions. [2022-01-31 22:17:09,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:17:09,521 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 [2022-01-31 22:17:09,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:17:09,523 INFO L225 Difference]: With dead ends: 529 [2022-01-31 22:17:09,523 INFO L226 Difference]: Without dead ends: 359 [2022-01-31 22:17:09,524 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 [2022-01-31 22:17:09,525 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 181 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-01-31 22:17:09,525 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] [2022-01-31 22:17:09,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-01-31 22:17:09,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 357. [2022-01-31 22:17:09,570 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) [2022-01-31 22:17:09,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 635 transitions. [2022-01-31 22:17:09,571 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 635 transitions. Word has length 28 [2022-01-31 22:17:09,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:17:09,573 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 635 transitions. [2022-01-31 22:17:09,573 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) [2022-01-31 22:17:09,573 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 635 transitions. [2022-01-31 22:17:09,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 22:17:09,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:17:09,574 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] [2022-01-31 22:17:09,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 22:17:09,574 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:17:09,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:17:09,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1815177647, now seen corresponding path program 1 times [2022-01-31 22:17:09,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:17:09,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345317998] [2022-01-31 22:17:09,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:17:09,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:17:09,576 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:17:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:09,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:17:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:09,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:17:09,609 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:17:09,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345317998] [2022-01-31 22:17:09,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [345317998] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:17:09,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:17:09,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:17:09,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937923343] [2022-01-31 22:17:09,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:17:09,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:17:09,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:17:09,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:17:09,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:17:09,610 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) [2022-01-31 22:17:09,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:17:09,708 INFO L93 Difference]: Finished difference Result 669 states and 1205 transitions. [2022-01-31 22:17:09,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:17:09,708 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 [2022-01-31 22:17:09,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:17:09,710 INFO L225 Difference]: With dead ends: 669 [2022-01-31 22:17:09,710 INFO L226 Difference]: Without dead ends: 667 [2022-01-31 22:17:09,711 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 [2022-01-31 22:17:09,711 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 215 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-01-31 22:17:09,711 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] [2022-01-31 22:17:09,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-01-31 22:17:09,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 489. [2022-01-31 22:17:09,733 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) [2022-01-31 22:17:09,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 859 transitions. [2022-01-31 22:17:09,734 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 859 transitions. Word has length 28 [2022-01-31 22:17:09,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:17:09,735 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 859 transitions. [2022-01-31 22:17:09,735 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) [2022-01-31 22:17:09,735 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 859 transitions. [2022-01-31 22:17:09,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 22:17:09,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:17:09,736 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] [2022-01-31 22:17:09,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 22:17:09,736 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:17:09,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:17:09,736 INFO L85 PathProgramCache]: Analyzing trace with hash 891441747, now seen corresponding path program 1 times [2022-01-31 22:17:09,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:17:09,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362686361] [2022-01-31 22:17:09,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:17:09,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:17:09,738 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:17:09,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:09,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:17:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:17:09,759 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:17:09,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362686361] [2022-01-31 22:17:09,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1362686361] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:17:09,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:17:09,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:17:09,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272270858] [2022-01-31 22:17:09,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:17:09,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:17:09,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:17:09,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:17:09,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:17:09,761 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) [2022-01-31 22:17:09,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:17:09,864 INFO L93 Difference]: Finished difference Result 1165 states and 2061 transitions. [2022-01-31 22:17:09,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:17:09,865 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 [2022-01-31 22:17:09,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:17:09,867 INFO L225 Difference]: With dead ends: 1165 [2022-01-31 22:17:09,867 INFO L226 Difference]: Without dead ends: 691 [2022-01-31 22:17:09,868 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 [2022-01-31 22:17:09,868 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 [2022-01-31 22:17:09,868 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] [2022-01-31 22:17:09,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-01-31 22:17:09,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 689. [2022-01-31 22:17:09,914 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) [2022-01-31 22:17:09,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1207 transitions. [2022-01-31 22:17:09,916 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1207 transitions. Word has length 28 [2022-01-31 22:17:09,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:17:09,916 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 1207 transitions. [2022-01-31 22:17:09,916 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) [2022-01-31 22:17:09,916 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1207 transitions. [2022-01-31 22:17:09,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 22:17:09,917 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:17:09,917 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] [2022-01-31 22:17:09,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 22:17:09,917 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:17:09,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:17:09,918 INFO L85 PathProgramCache]: Analyzing trace with hash -435719099, now seen corresponding path program 1 times [2022-01-31 22:17:09,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:17:09,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011768763] [2022-01-31 22:17:09,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:17:09,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:17:09,919 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:17:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:09,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:17:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:09,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:17:09,937 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:17:09,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011768763] [2022-01-31 22:17:09,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2011768763] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:17:09,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:17:09,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:17:09,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389783463] [2022-01-31 22:17:09,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:17:09,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:17:09,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:17:09,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:17:09,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:17:09,938 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) [2022-01-31 22:17:10,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:17:10,035 INFO L93 Difference]: Finished difference Result 1033 states and 1805 transitions. [2022-01-31 22:17:10,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:17:10,035 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 [2022-01-31 22:17:10,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:17:10,037 INFO L225 Difference]: With dead ends: 1033 [2022-01-31 22:17:10,037 INFO L226 Difference]: Without dead ends: 699 [2022-01-31 22:17:10,038 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 [2022-01-31 22:17:10,038 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 [2022-01-31 22:17:10,039 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] [2022-01-31 22:17:10,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-01-31 22:17:10,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 697. [2022-01-31 22:17:10,077 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) [2022-01-31 22:17:10,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1207 transitions. [2022-01-31 22:17:10,080 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1207 transitions. Word has length 29 [2022-01-31 22:17:10,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:17:10,080 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 1207 transitions. [2022-01-31 22:17:10,080 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) [2022-01-31 22:17:10,080 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1207 transitions. [2022-01-31 22:17:10,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 22:17:10,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:17:10,081 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] [2022-01-31 22:17:10,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 22:17:10,082 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:17:10,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:17:10,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1865103491, now seen corresponding path program 1 times [2022-01-31 22:17:10,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:17:10,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836892573] [2022-01-31 22:17:10,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:17:10,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:17:10,084 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:17:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:10,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:17:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:10,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:17:10,104 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:17:10,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836892573] [2022-01-31 22:17:10,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [836892573] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:17:10,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:17:10,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:17:10,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2661105] [2022-01-31 22:17:10,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:17:10,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:17:10,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:17:10,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:17:10,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:17:10,105 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) [2022-01-31 22:17:10,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:17:10,244 INFO L93 Difference]: Finished difference Result 1293 states and 2273 transitions. [2022-01-31 22:17:10,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:17:10,244 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 [2022-01-31 22:17:10,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:17:10,247 INFO L225 Difference]: With dead ends: 1293 [2022-01-31 22:17:10,247 INFO L226 Difference]: Without dead ends: 1291 [2022-01-31 22:17:10,248 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 [2022-01-31 22:17:10,248 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 [2022-01-31 22:17:10,248 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] [2022-01-31 22:17:10,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2022-01-31 22:17:10,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 969. [2022-01-31 22:17:10,293 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) [2022-01-31 22:17:10,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1647 transitions. [2022-01-31 22:17:10,296 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1647 transitions. Word has length 29 [2022-01-31 22:17:10,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:17:10,296 INFO L470 AbstractCegarLoop]: Abstraction has 969 states and 1647 transitions. [2022-01-31 22:17:10,296 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) [2022-01-31 22:17:10,296 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1647 transitions. [2022-01-31 22:17:10,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 22:17:10,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:17:10,297 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] [2022-01-31 22:17:10,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 22:17:10,297 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:17:10,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:17:10,298 INFO L85 PathProgramCache]: Analyzing trace with hash 276755589, now seen corresponding path program 1 times [2022-01-31 22:17:10,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:17:10,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132207628] [2022-01-31 22:17:10,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:17:10,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:17:10,299 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:17:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:10,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:17:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:10,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:17:10,317 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:17:10,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132207628] [2022-01-31 22:17:10,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2132207628] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:17:10,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:17:10,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:17:10,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323833124] [2022-01-31 22:17:10,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:17:10,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:17:10,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:17:10,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:17:10,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:17:10,318 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) [2022-01-31 22:17:10,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:17:10,472 INFO L93 Difference]: Finished difference Result 2301 states and 3937 transitions. [2022-01-31 22:17:10,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:17:10,473 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 [2022-01-31 22:17:10,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:17:10,476 INFO L225 Difference]: With dead ends: 2301 [2022-01-31 22:17:10,476 INFO L226 Difference]: Without dead ends: 1355 [2022-01-31 22:17:10,478 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 [2022-01-31 22:17:10,478 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 [2022-01-31 22:17:10,478 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] [2022-01-31 22:17:10,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2022-01-31 22:17:10,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1353. [2022-01-31 22:17:10,569 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) [2022-01-31 22:17:10,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 2295 transitions. [2022-01-31 22:17:10,573 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 2295 transitions. Word has length 29 [2022-01-31 22:17:10,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:17:10,573 INFO L470 AbstractCegarLoop]: Abstraction has 1353 states and 2295 transitions. [2022-01-31 22:17:10,573 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) [2022-01-31 22:17:10,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 2295 transitions. [2022-01-31 22:17:10,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 22:17:10,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:17:10,574 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:17:10,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 22:17:10,575 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:17:10,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:17:10,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1983846824, now seen corresponding path program 1 times [2022-01-31 22:17:10,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:17:10,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496413514] [2022-01-31 22:17:10,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:17:10,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:17:10,576 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:17:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:10,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:17:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:10,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:17:10,595 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:17:10,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496413514] [2022-01-31 22:17:10,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1496413514] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:17:10,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:17:10,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:17:10,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529282271] [2022-01-31 22:17:10,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:17:10,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:17:10,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:17:10,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:17:10,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:17:10,596 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) [2022-01-31 22:17:10,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:17:10,727 INFO L93 Difference]: Finished difference Result 2029 states and 3433 transitions. [2022-01-31 22:17:10,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:17:10,728 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 [2022-01-31 22:17:10,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:17:10,731 INFO L225 Difference]: With dead ends: 2029 [2022-01-31 22:17:10,731 INFO L226 Difference]: Without dead ends: 1371 [2022-01-31 22:17:10,732 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 [2022-01-31 22:17:10,733 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 [2022-01-31 22:17:10,733 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] [2022-01-31 22:17:10,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2022-01-31 22:17:10,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1369. [2022-01-31 22:17:10,819 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) [2022-01-31 22:17:10,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2295 transitions. [2022-01-31 22:17:10,823 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2295 transitions. Word has length 30 [2022-01-31 22:17:10,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:17:10,823 INFO L470 AbstractCegarLoop]: Abstraction has 1369 states and 2295 transitions. [2022-01-31 22:17:10,823 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) [2022-01-31 22:17:10,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2295 transitions. [2022-01-31 22:17:10,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 22:17:10,825 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:17:10,825 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:17:10,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 22:17:10,825 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:17:10,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:17:10,825 INFO L85 PathProgramCache]: Analyzing trace with hash -10297882, now seen corresponding path program 1 times [2022-01-31 22:17:10,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:17:10,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988120774] [2022-01-31 22:17:10,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:17:10,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:17:10,827 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:17:10,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:10,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:17:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:10,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:17:10,843 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:17:10,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988120774] [2022-01-31 22:17:10,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1988120774] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:17:10,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:17:10,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:17:10,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768803718] [2022-01-31 22:17:10,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:17:10,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:17:10,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:17:10,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:17:10,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:17:10,844 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) [2022-01-31 22:17:11,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:17:11,059 INFO L93 Difference]: Finished difference Result 2509 states and 4281 transitions. [2022-01-31 22:17:11,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:17:11,060 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 [2022-01-31 22:17:11,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:17:11,066 INFO L225 Difference]: With dead ends: 2509 [2022-01-31 22:17:11,066 INFO L226 Difference]: Without dead ends: 2507 [2022-01-31 22:17:11,067 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 [2022-01-31 22:17:11,067 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 [2022-01-31 22:17:11,067 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] [2022-01-31 22:17:11,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2022-01-31 22:17:11,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 1929. [2022-01-31 22:17:11,170 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) [2022-01-31 22:17:11,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 3159 transitions. [2022-01-31 22:17:11,175 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 3159 transitions. Word has length 30 [2022-01-31 22:17:11,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:17:11,175 INFO L470 AbstractCegarLoop]: Abstraction has 1929 states and 3159 transitions. [2022-01-31 22:17:11,175 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) [2022-01-31 22:17:11,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 3159 transitions. [2022-01-31 22:17:11,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 22:17:11,177 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:17:11,177 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:17:11,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 22:17:11,177 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:17:11,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:17:11,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1598645784, now seen corresponding path program 1 times [2022-01-31 22:17:11,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:17:11,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681052317] [2022-01-31 22:17:11,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:17:11,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:17:11,179 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:17:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:11,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:17:11,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:17:11,194 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:17:11,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681052317] [2022-01-31 22:17:11,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1681052317] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:17:11,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:17:11,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:17:11,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454408299] [2022-01-31 22:17:11,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:17:11,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:17:11,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:17:11,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:17:11,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:17:11,195 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) [2022-01-31 22:17:11,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:17:11,435 INFO L93 Difference]: Finished difference Result 4557 states and 7513 transitions. [2022-01-31 22:17:11,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:17:11,435 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 [2022-01-31 22:17:11,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:17:11,442 INFO L225 Difference]: With dead ends: 4557 [2022-01-31 22:17:11,442 INFO L226 Difference]: Without dead ends: 2667 [2022-01-31 22:17:11,444 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 [2022-01-31 22:17:11,444 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 [2022-01-31 22:17:11,445 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] [2022-01-31 22:17:11,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2022-01-31 22:17:11,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 2665. [2022-01-31 22:17:11,648 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) [2022-01-31 22:17:11,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2665 states to 2665 states and 4359 transitions. [2022-01-31 22:17:11,655 INFO L78 Accepts]: Start accepts. Automaton has 2665 states and 4359 transitions. Word has length 30 [2022-01-31 22:17:11,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:17:11,655 INFO L470 AbstractCegarLoop]: Abstraction has 2665 states and 4359 transitions. [2022-01-31 22:17:11,655 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) [2022-01-31 22:17:11,655 INFO L276 IsEmpty]: Start isEmpty. Operand 2665 states and 4359 transitions. [2022-01-31 22:17:11,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 22:17:11,657 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:17:11,657 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] [2022-01-31 22:17:11,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 22:17:11,657 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:17:11,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:17:11,657 INFO L85 PathProgramCache]: Analyzing trace with hash -319020550, now seen corresponding path program 1 times [2022-01-31 22:17:11,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:17:11,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639326018] [2022-01-31 22:17:11,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:17:11,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:17:11,659 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:17:11,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:11,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:17:11,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:11,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:17:11,676 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:17:11,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639326018] [2022-01-31 22:17:11,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [639326018] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:17:11,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:17:11,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:17:11,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450732158] [2022-01-31 22:17:11,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:17:11,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:17:11,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:17:11,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:17:11,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:17:11,677 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) [2022-01-31 22:17:11,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:17:11,890 INFO L93 Difference]: Finished difference Result 3997 states and 6521 transitions. [2022-01-31 22:17:11,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:17:11,891 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 [2022-01-31 22:17:11,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:17:11,897 INFO L225 Difference]: With dead ends: 3997 [2022-01-31 22:17:11,897 INFO L226 Difference]: Without dead ends: 2699 [2022-01-31 22:17:11,900 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 [2022-01-31 22:17:11,900 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 [2022-01-31 22:17:11,900 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] [2022-01-31 22:17:11,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2022-01-31 22:17:12,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 2697. [2022-01-31 22:17:12,078 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) [2022-01-31 22:17:12,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2697 states to 2697 states and 4359 transitions. [2022-01-31 22:17:12,082 INFO L78 Accepts]: Start accepts. Automaton has 2697 states and 4359 transitions. Word has length 31 [2022-01-31 22:17:12,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:17:12,082 INFO L470 AbstractCegarLoop]: Abstraction has 2697 states and 4359 transitions. [2022-01-31 22:17:12,082 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) [2022-01-31 22:17:12,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2697 states and 4359 transitions. [2022-01-31 22:17:12,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 22:17:12,084 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:17:12,084 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] [2022-01-31 22:17:12,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 22:17:12,084 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:17:12,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:17:12,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1981802040, now seen corresponding path program 1 times [2022-01-31 22:17:12,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:17:12,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122555582] [2022-01-31 22:17:12,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:17:12,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:17:12,086 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:17:12,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:12,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:17:12,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:12,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:17:12,101 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:17:12,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122555582] [2022-01-31 22:17:12,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [122555582] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:17:12,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:17:12,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:17:12,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831917824] [2022-01-31 22:17:12,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:17:12,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:17:12,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:17:12,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:17:12,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:17:12,102 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) [2022-01-31 22:17:12,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:17:12,447 INFO L93 Difference]: Finished difference Result 4877 states and 8041 transitions. [2022-01-31 22:17:12,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:17:12,447 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 [2022-01-31 22:17:12,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:17:12,462 INFO L225 Difference]: With dead ends: 4877 [2022-01-31 22:17:12,462 INFO L226 Difference]: Without dead ends: 4875 [2022-01-31 22:17:12,463 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 [2022-01-31 22:17:12,464 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 [2022-01-31 22:17:12,464 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] [2022-01-31 22:17:12,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2022-01-31 22:17:12,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 3849. [2022-01-31 22:17:12,712 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) [2022-01-31 22:17:12,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3849 states to 3849 states and 6055 transitions. [2022-01-31 22:17:12,718 INFO L78 Accepts]: Start accepts. Automaton has 3849 states and 6055 transitions. Word has length 31 [2022-01-31 22:17:12,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:17:12,718 INFO L470 AbstractCegarLoop]: Abstraction has 3849 states and 6055 transitions. [2022-01-31 22:17:12,718 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) [2022-01-31 22:17:12,718 INFO L276 IsEmpty]: Start isEmpty. Operand 3849 states and 6055 transitions. [2022-01-31 22:17:12,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 22:17:12,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:17:12,721 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] [2022-01-31 22:17:12,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 22:17:12,721 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:17:12,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:17:12,721 INFO L85 PathProgramCache]: Analyzing trace with hash 393454138, now seen corresponding path program 1 times [2022-01-31 22:17:12,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:17:12,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218184654] [2022-01-31 22:17:12,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:17:12,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:17:12,722 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:17:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:12,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:17:12,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:12,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:17:12,737 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:17:12,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218184654] [2022-01-31 22:17:12,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1218184654] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:17:12,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:17:12,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:17:12,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403509847] [2022-01-31 22:17:12,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:17:12,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:17:12,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:17:12,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:17:12,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:17:12,739 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) [2022-01-31 22:17:13,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:17:13,236 INFO L93 Difference]: Finished difference Result 9037 states and 14313 transitions. [2022-01-31 22:17:13,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:17:13,236 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 [2022-01-31 22:17:13,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:17:13,250 INFO L225 Difference]: With dead ends: 9037 [2022-01-31 22:17:13,250 INFO L226 Difference]: Without dead ends: 5259 [2022-01-31 22:17:13,255 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 [2022-01-31 22:17:13,256 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 172 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-01-31 22:17:13,256 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] [2022-01-31 22:17:13,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5259 states. [2022-01-31 22:17:13,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5259 to 5257. [2022-01-31 22:17:13,610 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) [2022-01-31 22:17:13,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5257 states to 5257 states and 8263 transitions. [2022-01-31 22:17:13,618 INFO L78 Accepts]: Start accepts. Automaton has 5257 states and 8263 transitions. Word has length 31 [2022-01-31 22:17:13,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:17:13,618 INFO L470 AbstractCegarLoop]: Abstraction has 5257 states and 8263 transitions. [2022-01-31 22:17:13,619 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) [2022-01-31 22:17:13,619 INFO L276 IsEmpty]: Start isEmpty. Operand 5257 states and 8263 transitions. [2022-01-31 22:17:13,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 22:17:13,622 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:17:13,622 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] [2022-01-31 22:17:13,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 22:17:13,622 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:17:13,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:17:13,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1306535229, now seen corresponding path program 1 times [2022-01-31 22:17:13,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:17:13,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606625919] [2022-01-31 22:17:13,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:17:13,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:17:13,623 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:17:13,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:13,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:17:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:13,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:17:13,638 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:17:13,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606625919] [2022-01-31 22:17:13,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1606625919] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:17:13,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:17:13,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:17:13,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321424971] [2022-01-31 22:17:13,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:17:13,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:17:13,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:17:13,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:17:13,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:17:13,640 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) [2022-01-31 22:17:14,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:17:14,031 INFO L93 Difference]: Finished difference Result 7885 states and 12361 transitions. [2022-01-31 22:17:14,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:17:14,031 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 [2022-01-31 22:17:14,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:17:14,039 INFO L225 Difference]: With dead ends: 7885 [2022-01-31 22:17:14,039 INFO L226 Difference]: Without dead ends: 5323 [2022-01-31 22:17:14,043 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 [2022-01-31 22:17:14,043 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 177 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-01-31 22:17:14,044 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] [2022-01-31 22:17:14,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5323 states. [2022-01-31 22:17:14,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5323 to 5321. [2022-01-31 22:17:14,400 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) [2022-01-31 22:17:14,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5321 states to 5321 states and 8263 transitions. [2022-01-31 22:17:14,407 INFO L78 Accepts]: Start accepts. Automaton has 5321 states and 8263 transitions. Word has length 32 [2022-01-31 22:17:14,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:17:14,407 INFO L470 AbstractCegarLoop]: Abstraction has 5321 states and 8263 transitions. [2022-01-31 22:17:14,407 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) [2022-01-31 22:17:14,407 INFO L276 IsEmpty]: Start isEmpty. Operand 5321 states and 8263 transitions. [2022-01-31 22:17:14,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 22:17:14,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:17:14,410 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] [2022-01-31 22:17:14,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 22:17:14,410 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:17:14,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:17:14,411 INFO L85 PathProgramCache]: Analyzing trace with hash -687609477, now seen corresponding path program 1 times [2022-01-31 22:17:14,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:17:14,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074499362] [2022-01-31 22:17:14,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:17:14,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:17:14,412 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:17:14,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:14,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:17:14,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:14,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:17:14,427 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:17:14,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074499362] [2022-01-31 22:17:14,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1074499362] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:17:14,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:17:14,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:17:14,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164322413] [2022-01-31 22:17:14,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:17:14,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:17:14,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:17:14,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:17:14,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:17:14,428 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) [2022-01-31 22:17:15,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:17:15,235 INFO L93 Difference]: Finished difference Result 9485 states and 15049 transitions. [2022-01-31 22:17:15,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:17:15,235 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 [2022-01-31 22:17:15,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:17:15,252 INFO L225 Difference]: With dead ends: 9485 [2022-01-31 22:17:15,252 INFO L226 Difference]: Without dead ends: 9483 [2022-01-31 22:17:15,255 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 [2022-01-31 22:17:15,255 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 187 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-01-31 22:17:15,256 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] [2022-01-31 22:17:15,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9483 states. [2022-01-31 22:17:15,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9483 to 7689. [2022-01-31 22:17:15,807 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) [2022-01-31 22:17:15,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7689 states to 7689 states and 11591 transitions. [2022-01-31 22:17:15,816 INFO L78 Accepts]: Start accepts. Automaton has 7689 states and 11591 transitions. Word has length 32 [2022-01-31 22:17:15,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:17:15,816 INFO L470 AbstractCegarLoop]: Abstraction has 7689 states and 11591 transitions. [2022-01-31 22:17:15,816 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) [2022-01-31 22:17:15,817 INFO L276 IsEmpty]: Start isEmpty. Operand 7689 states and 11591 transitions. [2022-01-31 22:17:15,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 22:17:15,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:17:15,823 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, 1, 1, 1, 1] [2022-01-31 22:17:15,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 22:17:15,824 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:17:15,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:17:15,824 INFO L85 PathProgramCache]: Analyzing trace with hash 2019009917, now seen corresponding path program 1 times [2022-01-31 22:17:15,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:17:15,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845122186] [2022-01-31 22:17:15,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:17:15,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:17:15,825 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:17:15,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:15,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:17:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:17:15,840 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:17:15,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845122186] [2022-01-31 22:17:15,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [845122186] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:17:15,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:17:15,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:17:15,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146888273] [2022-01-31 22:17:15,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:17:15,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:17:15,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:17:15,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:17:15,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:17:15,841 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) [2022-01-31 22:17:16,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:17:16,709 INFO L93 Difference]: Finished difference Result 17933 states and 27209 transitions. [2022-01-31 22:17:16,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:17:16,709 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 [2022-01-31 22:17:16,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:17:16,725 INFO L225 Difference]: With dead ends: 17933 [2022-01-31 22:17:16,725 INFO L226 Difference]: Without dead ends: 10379 [2022-01-31 22:17:16,739 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 [2022-01-31 22:17:16,740 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 166 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-01-31 22:17:16,741 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] [2022-01-31 22:17:16,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10379 states. [2022-01-31 22:17:17,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10379 to 10377. [2022-01-31 22:17:17,474 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) [2022-01-31 22:17:17,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10377 states to 10377 states and 15623 transitions. [2022-01-31 22:17:17,486 INFO L78 Accepts]: Start accepts. Automaton has 10377 states and 15623 transitions. Word has length 32 [2022-01-31 22:17:17,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:17:17,486 INFO L470 AbstractCegarLoop]: Abstraction has 10377 states and 15623 transitions. [2022-01-31 22:17:17,486 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) [2022-01-31 22:17:17,486 INFO L276 IsEmpty]: Start isEmpty. Operand 10377 states and 15623 transitions. [2022-01-31 22:17:17,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 22:17:17,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:17:17,494 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] [2022-01-31 22:17:17,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 22:17:17,494 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:17:17,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:17:17,494 INFO L85 PathProgramCache]: Analyzing trace with hash 159157167, now seen corresponding path program 1 times [2022-01-31 22:17:17,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:17:17,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935654318] [2022-01-31 22:17:17,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:17:17,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:17:17,496 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:17:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:17,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:17:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:17,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:17:17,515 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:17:17,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935654318] [2022-01-31 22:17:17,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1935654318] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:17:17,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:17:17,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:17:17,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709408301] [2022-01-31 22:17:17,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:17:17,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:17:17,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:17:17,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:17:17,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:17:17,517 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) [2022-01-31 22:17:18,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:17:18,413 INFO L93 Difference]: Finished difference Result 15565 states and 23369 transitions. [2022-01-31 22:17:18,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:17:18,414 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 [2022-01-31 22:17:18,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:17:18,429 INFO L225 Difference]: With dead ends: 15565 [2022-01-31 22:17:18,429 INFO L226 Difference]: Without dead ends: 10507 [2022-01-31 22:17:18,440 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 [2022-01-31 22:17:18,440 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 176 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-01-31 22:17:18,440 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] [2022-01-31 22:17:18,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10507 states. [2022-01-31 22:17:19,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10507 to 10505. [2022-01-31 22:17:19,261 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) [2022-01-31 22:17:19,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10505 states to 10505 states and 15623 transitions. [2022-01-31 22:17:19,341 INFO L78 Accepts]: Start accepts. Automaton has 10505 states and 15623 transitions. Word has length 33 [2022-01-31 22:17:19,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:17:19,341 INFO L470 AbstractCegarLoop]: Abstraction has 10505 states and 15623 transitions. [2022-01-31 22:17:19,341 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) [2022-01-31 22:17:19,341 INFO L276 IsEmpty]: Start isEmpty. Operand 10505 states and 15623 transitions. [2022-01-31 22:17:19,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 22:17:19,348 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:17:19,348 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] [2022-01-31 22:17:19,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 22:17:19,348 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:17:19,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:17:19,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1834987539, now seen corresponding path program 1 times [2022-01-31 22:17:19,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:17:19,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515283806] [2022-01-31 22:17:19,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:17:19,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:17:19,349 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:17:19,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:19,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:17:19,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:19,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:17:19,370 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:17:19,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515283806] [2022-01-31 22:17:19,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [515283806] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:17:19,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:17:19,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:17:19,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948508522] [2022-01-31 22:17:19,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:17:19,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:17:19,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:17:19,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:17:19,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:17:19,372 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) [2022-01-31 22:17:20,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:17:20,719 INFO L93 Difference]: Finished difference Result 18445 states and 28041 transitions. [2022-01-31 22:17:20,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:17:20,720 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 [2022-01-31 22:17:20,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:17:20,742 INFO L225 Difference]: With dead ends: 18445 [2022-01-31 22:17:20,742 INFO L226 Difference]: Without dead ends: 18443 [2022-01-31 22:17:20,745 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 [2022-01-31 22:17:20,746 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 180 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-01-31 22:17:20,746 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] [2022-01-31 22:17:20,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18443 states. [2022-01-31 22:17:21,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18443 to 15369. [2022-01-31 22:17:21,911 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) [2022-01-31 22:17:21,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15369 states to 15369 states and 22151 transitions. [2022-01-31 22:17:21,931 INFO L78 Accepts]: Start accepts. Automaton has 15369 states and 22151 transitions. Word has length 33 [2022-01-31 22:17:21,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:17:21,931 INFO L470 AbstractCegarLoop]: Abstraction has 15369 states and 22151 transitions. [2022-01-31 22:17:21,931 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) [2022-01-31 22:17:21,931 INFO L276 IsEmpty]: Start isEmpty. Operand 15369 states and 22151 transitions. [2022-01-31 22:17:21,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 22:17:21,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:17:21,944 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] [2022-01-31 22:17:21,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 22:17:21,944 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:17:21,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:17:21,945 INFO L85 PathProgramCache]: Analyzing trace with hash 871631855, now seen corresponding path program 1 times [2022-01-31 22:17:21,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:17:21,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895576827] [2022-01-31 22:17:21,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:17:21,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:17:21,946 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:17:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:21,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:17:21,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:21,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:17:21,960 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:17:21,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895576827] [2022-01-31 22:17:21,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [895576827] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:17:21,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:17:21,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:17:21,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706213594] [2022-01-31 22:17:21,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:17:21,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:17:21,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:17:21,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:17:21,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:17:21,961 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) [2022-01-31 22:17:23,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:17:23,672 INFO L93 Difference]: Finished difference Result 35597 states and 51593 transitions. [2022-01-31 22:17:23,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:17:23,673 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 [2022-01-31 22:17:23,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:17:23,699 INFO L225 Difference]: With dead ends: 35597 [2022-01-31 22:17:23,699 INFO L226 Difference]: Without dead ends: 20491 [2022-01-31 22:17:23,736 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 [2022-01-31 22:17:23,736 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 160 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-01-31 22:17:23,736 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] [2022-01-31 22:17:23,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20491 states. [2022-01-31 22:17:25,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20491 to 20489. [2022-01-31 22:17:25,334 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) [2022-01-31 22:17:25,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20489 states to 20489 states and 29447 transitions. [2022-01-31 22:17:25,363 INFO L78 Accepts]: Start accepts. Automaton has 20489 states and 29447 transitions. Word has length 33 [2022-01-31 22:17:25,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:17:25,363 INFO L470 AbstractCegarLoop]: Abstraction has 20489 states and 29447 transitions. [2022-01-31 22:17:25,364 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) [2022-01-31 22:17:25,364 INFO L276 IsEmpty]: Start isEmpty. Operand 20489 states and 29447 transitions. [2022-01-31 22:17:25,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 22:17:25,376 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:17:25,376 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] [2022-01-31 22:17:25,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 22:17:25,376 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:17:25,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:17:25,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1049824046, now seen corresponding path program 1 times [2022-01-31 22:17:25,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:17:25,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877441007] [2022-01-31 22:17:25,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:17:25,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:17:25,377 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:17:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:25,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:17:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:25,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:17:25,409 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:17:25,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877441007] [2022-01-31 22:17:25,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [877441007] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:17:25,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:17:25,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:17:25,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701458287] [2022-01-31 22:17:25,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:17:25,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:17:25,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:17:25,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:17:25,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:17:25,410 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) [2022-01-31 22:17:27,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:17:27,042 INFO L93 Difference]: Finished difference Result 30733 states and 44041 transitions. [2022-01-31 22:17:27,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:17:27,042 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 [2022-01-31 22:17:27,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:17:27,070 INFO L225 Difference]: With dead ends: 30733 [2022-01-31 22:17:27,071 INFO L226 Difference]: Without dead ends: 20747 [2022-01-31 22:17:27,091 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 [2022-01-31 22:17:27,091 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 175 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-01-31 22:17:27,091 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] [2022-01-31 22:17:27,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20747 states. [2022-01-31 22:17:28,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20747 to 20745. [2022-01-31 22:17:28,747 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) [2022-01-31 22:17:28,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20745 states to 20745 states and 29447 transitions. [2022-01-31 22:17:28,778 INFO L78 Accepts]: Start accepts. Automaton has 20745 states and 29447 transitions. Word has length 34 [2022-01-31 22:17:28,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:17:28,778 INFO L470 AbstractCegarLoop]: Abstraction has 20745 states and 29447 transitions. [2022-01-31 22:17:28,778 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) [2022-01-31 22:17:28,778 INFO L276 IsEmpty]: Start isEmpty. Operand 20745 states and 29447 transitions. [2022-01-31 22:17:28,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 22:17:28,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:17:28,790 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] [2022-01-31 22:17:28,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 22:17:28,791 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:17:28,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:17:28,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1250998544, now seen corresponding path program 1 times [2022-01-31 22:17:28,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:17:28,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597498451] [2022-01-31 22:17:28,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:17:28,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:17:28,792 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:17:28,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:28,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:17:28,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:28,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:17:28,807 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:17:28,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597498451] [2022-01-31 22:17:28,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [597498451] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:17:28,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:17:28,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:17:28,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265831001] [2022-01-31 22:17:28,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:17:28,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:17:28,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:17:28,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:17:28,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:17:28,808 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) [2022-01-31 22:17:32,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:17:32,002 INFO L93 Difference]: Finished difference Result 60685 states and 85257 transitions. [2022-01-31 22:17:32,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:17:32,003 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 [2022-01-31 22:17:32,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:17:32,063 INFO L225 Difference]: With dead ends: 60685 [2022-01-31 22:17:32,063 INFO L226 Difference]: Without dead ends: 40459 [2022-01-31 22:17:32,111 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 [2022-01-31 22:17:32,111 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 [2022-01-31 22:17:32,112 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] [2022-01-31 22:17:32,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40459 states. [2022-01-31 22:17:35,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40459 to 40457. [2022-01-31 22:17:35,438 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) [2022-01-31 22:17:35,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40457 states to 40457 states and 55815 transitions. [2022-01-31 22:17:35,501 INFO L78 Accepts]: Start accepts. Automaton has 40457 states and 55815 transitions. Word has length 34 [2022-01-31 22:17:35,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:17:35,501 INFO L470 AbstractCegarLoop]: Abstraction has 40457 states and 55815 transitions. [2022-01-31 22:17:35,501 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) [2022-01-31 22:17:35,501 INFO L276 IsEmpty]: Start isEmpty. Operand 40457 states and 55815 transitions. [2022-01-31 22:17:35,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 22:17:35,521 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:17:35,521 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] [2022-01-31 22:17:35,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 22:17:35,521 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:17:35,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:17:35,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1455620850, now seen corresponding path program 1 times [2022-01-31 22:17:35,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:17:35,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394343351] [2022-01-31 22:17:35,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:17:35,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:17:35,523 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:17:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:35,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:17:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:35,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:17:35,537 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:17:35,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394343351] [2022-01-31 22:17:35,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [394343351] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:17:35,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:17:35,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:17:35,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833210641] [2022-01-31 22:17:35,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:17:35,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:17:35,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:17:35,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:17:35,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:17:35,538 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) [2022-01-31 22:17:39,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:17:39,491 INFO L93 Difference]: Finished difference Result 45581 states and 65033 transitions. [2022-01-31 22:17:39,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:17:39,491 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 [2022-01-31 22:17:39,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:17:39,562 INFO L225 Difference]: With dead ends: 45581 [2022-01-31 22:17:39,562 INFO L226 Difference]: Without dead ends: 45579 [2022-01-31 22:17:39,581 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 [2022-01-31 22:17:39,582 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 [2022-01-31 22:17:39,583 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] [2022-01-31 22:17:39,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45579 states. [2022-01-31 22:17:42,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45579 to 40457. [2022-01-31 22:17:42,941 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) [2022-01-31 22:17:43,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40457 states to 40457 states and 55303 transitions. [2022-01-31 22:17:43,158 INFO L78 Accepts]: Start accepts. Automaton has 40457 states and 55303 transitions. Word has length 34 [2022-01-31 22:17:43,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:17:43,158 INFO L470 AbstractCegarLoop]: Abstraction has 40457 states and 55303 transitions. [2022-01-31 22:17:43,158 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) [2022-01-31 22:17:43,158 INFO L276 IsEmpty]: Start isEmpty. Operand 40457 states and 55303 transitions. [2022-01-31 22:17:43,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 22:17:43,178 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:17:43,178 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] [2022-01-31 22:17:43,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 22:17:43,178 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:17:43,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:17:43,179 INFO L85 PathProgramCache]: Analyzing trace with hash 126464356, now seen corresponding path program 1 times [2022-01-31 22:17:43,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:17:43,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271929272] [2022-01-31 22:17:43,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:17:43,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:17:43,180 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:17:43,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:43,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:17:43,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:43,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:17:43,194 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:17:43,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271929272] [2022-01-31 22:17:43,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [271929272] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:17:43,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:17:43,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:17:43,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780187238] [2022-01-31 22:17:43,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:17:43,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:17:43,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:17:43,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:17:43,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:17:43,195 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) [2022-01-31 22:17:48,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:17:48,979 INFO L93 Difference]: Finished difference Result 69133 states and 96265 transitions. [2022-01-31 22:17:48,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:17:48,980 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 [2022-01-31 22:17:48,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:17:49,091 INFO L225 Difference]: With dead ends: 69133 [2022-01-31 22:17:49,091 INFO L226 Difference]: Without dead ends: 69131 [2022-01-31 22:17:49,116 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 [2022-01-31 22:17:49,116 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 166 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-01-31 22:17:49,116 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] [2022-01-31 22:17:49,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69131 states. [2022-01-31 22:17:54,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69131 to 60937. [2022-01-31 22:17:54,592 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) [2022-01-31 22:17:54,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60937 states to 60937 states and 80903 transitions. [2022-01-31 22:17:54,689 INFO L78 Accepts]: Start accepts. Automaton has 60937 states and 80903 transitions. Word has length 35 [2022-01-31 22:17:54,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:17:54,689 INFO L470 AbstractCegarLoop]: Abstraction has 60937 states and 80903 transitions. [2022-01-31 22:17:54,689 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) [2022-01-31 22:17:54,689 INFO L276 IsEmpty]: Start isEmpty. Operand 60937 states and 80903 transitions. [2022-01-31 22:17:54,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 22:17:54,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:17:54,731 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] [2022-01-31 22:17:54,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 22:17:54,731 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:17:54,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:17:54,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1461883546, now seen corresponding path program 1 times [2022-01-31 22:17:54,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:17:54,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033338899] [2022-01-31 22:17:54,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:17:54,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:17:54,732 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:17:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:54,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:17:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:17:54,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:17:54,774 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:17:54,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033338899] [2022-01-31 22:17:54,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1033338899] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:17:54,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:17:54,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:17:54,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126539758] [2022-01-31 22:17:54,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:17:54,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:17:54,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:17:54,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:17:54,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:17:54,775 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) [2022-01-31 22:18:01,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:18:01,851 INFO L93 Difference]: Finished difference Result 139789 states and 186377 transitions. [2022-01-31 22:18:01,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:18:01,851 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 [2022-01-31 22:18:01,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:18:01,985 INFO L225 Difference]: With dead ends: 139789 [2022-01-31 22:18:01,985 INFO L226 Difference]: Without dead ends: 79371 [2022-01-31 22:18:02,081 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 [2022-01-31 22:18:02,083 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 148 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-01-31 22:18:02,083 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] [2022-01-31 22:18:02,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79371 states. [2022-01-31 22:18:09,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79371 to 79369. [2022-01-31 22:18:09,373 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) [2022-01-31 22:18:09,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79369 states to 79369 states and 104455 transitions. [2022-01-31 22:18:09,648 INFO L78 Accepts]: Start accepts. Automaton has 79369 states and 104455 transitions. Word has length 35 [2022-01-31 22:18:09,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:18:09,648 INFO L470 AbstractCegarLoop]: Abstraction has 79369 states and 104455 transitions. [2022-01-31 22:18:09,648 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) [2022-01-31 22:18:09,648 INFO L276 IsEmpty]: Start isEmpty. Operand 79369 states and 104455 transitions. [2022-01-31 22:18:09,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 22:18:09,689 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:18:09,689 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] [2022-01-31 22:18:09,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 22:18:09,690 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:18:09,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:18:09,690 INFO L85 PathProgramCache]: Analyzing trace with hash -374356763, now seen corresponding path program 1 times [2022-01-31 22:18:09,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:18:09,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495084754] [2022-01-31 22:18:09,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:18:09,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:18:09,691 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:18:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:18:09,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:18:09,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:18:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:18:09,707 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:18:09,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495084754] [2022-01-31 22:18:09,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1495084754] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:18:09,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:18:09,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:18:09,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438981157] [2022-01-31 22:18:09,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:18:09,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:18:09,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:18:09,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:18:09,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:18:09,708 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) [2022-01-31 22:18:16,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:18:16,895 INFO L93 Difference]: Finished difference Result 119821 states and 157705 transitions. [2022-01-31 22:18:16,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:18:16,895 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 [2022-01-31 22:18:16,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:18:17,029 INFO L225 Difference]: With dead ends: 119821 [2022-01-31 22:18:17,029 INFO L226 Difference]: Without dead ends: 80907 [2022-01-31 22:18:17,097 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 [2022-01-31 22:18:17,097 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 [2022-01-31 22:18:17,097 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] [2022-01-31 22:18:17,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80907 states. [2022-01-31 22:18:24,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80907 to 80905. [2022-01-31 22:18:24,454 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) [2022-01-31 22:18:24,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80905 states to 80905 states and 105479 transitions. [2022-01-31 22:18:24,721 INFO L78 Accepts]: Start accepts. Automaton has 80905 states and 105479 transitions. Word has length 36 [2022-01-31 22:18:24,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:18:24,721 INFO L470 AbstractCegarLoop]: Abstraction has 80905 states and 105479 transitions. [2022-01-31 22:18:24,721 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) [2022-01-31 22:18:24,721 INFO L276 IsEmpty]: Start isEmpty. Operand 80905 states and 105479 transitions. [2022-01-31 22:18:24,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 22:18:24,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:18:24,761 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] [2022-01-31 22:18:24,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 22:18:24,762 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:18:24,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:18:24,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1926465827, now seen corresponding path program 1 times [2022-01-31 22:18:24,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:18:24,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438659219] [2022-01-31 22:18:24,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:18:24,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:18:24,763 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:18:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:18:24,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:18:24,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:18:24,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:18:24,783 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:18:24,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438659219] [2022-01-31 22:18:24,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [438659219] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:18:24,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:18:24,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:18:24,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288016229] [2022-01-31 22:18:24,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:18:24,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:18:24,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:18:24,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:18:24,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:18:24,784 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) [2022-01-31 22:18:37,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:18:37,348 INFO L93 Difference]: Finished difference Result 135181 states and 178185 transitions. [2022-01-31 22:18:37,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:18:37,349 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 [2022-01-31 22:18:37,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:18:37,763 INFO L225 Difference]: With dead ends: 135181 [2022-01-31 22:18:37,763 INFO L226 Difference]: Without dead ends: 135179 [2022-01-31 22:18:37,804 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 [2022-01-31 22:18:37,804 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 [2022-01-31 22:18:37,804 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] [2022-01-31 22:18:37,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135179 states. [2022-01-31 22:18:49,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135179 to 122889. [2022-01-31 22:18:49,829 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) [2022-01-31 22:18:50,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122889 states to 122889 states and 155655 transitions. [2022-01-31 22:18:50,320 INFO L78 Accepts]: Start accepts. Automaton has 122889 states and 155655 transitions. Word has length 36 [2022-01-31 22:18:50,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:18:50,320 INFO L470 AbstractCegarLoop]: Abstraction has 122889 states and 155655 transitions. [2022-01-31 22:18:50,320 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) [2022-01-31 22:18:50,320 INFO L276 IsEmpty]: Start isEmpty. Operand 122889 states and 155655 transitions. [2022-01-31 22:18:50,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 22:18:50,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:18:50,407 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:18:50,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 22:18:50,408 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:18:50,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:18:50,408 INFO L85 PathProgramCache]: Analyzing trace with hash 338117925, now seen corresponding path program 1 times [2022-01-31 22:18:50,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:18:50,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735861070] [2022-01-31 22:18:50,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:18:50,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:18:50,409 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:18:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:18:50,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:18:50,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:18:50,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:18:50,446 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:18:50,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735861070] [2022-01-31 22:18:50,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [735861070] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:18:50,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:18:50,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:18:50,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090800559] [2022-01-31 22:18:50,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:18:50,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:18:50,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:18:50,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:18:50,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:18:50,448 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) [2022-01-31 22:19:05,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:19:05,727 INFO L93 Difference]: Finished difference Result 278541 states and 352265 transitions. [2022-01-31 22:19:05,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:19:05,728 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 [2022-01-31 22:19:05,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:19:06,190 INFO L225 Difference]: With dead ends: 278541 [2022-01-31 22:19:06,190 INFO L226 Difference]: Without dead ends: 157707 [2022-01-31 22:19:06,347 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 [2022-01-31 22:19:06,347 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 [2022-01-31 22:19:06,347 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] [2022-01-31 22:19:06,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157707 states. [2022-01-31 22:19:21,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157707 to 157705. [2022-01-31 22:19:21,921 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) [2022-01-31 22:19:22,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157705 states to 157705 states and 196615 transitions. [2022-01-31 22:19:22,264 INFO L78 Accepts]: Start accepts. Automaton has 157705 states and 196615 transitions. Word has length 36 [2022-01-31 22:19:22,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:19:22,264 INFO L470 AbstractCegarLoop]: Abstraction has 157705 states and 196615 transitions. [2022-01-31 22:19:22,264 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) [2022-01-31 22:19:22,264 INFO L276 IsEmpty]: Start isEmpty. Operand 157705 states and 196615 transitions. [2022-01-31 22:19:22,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 22:19:22,360 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:19:22,360 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] [2022-01-31 22:19:22,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 22:19:22,360 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:19:22,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:19:22,360 INFO L85 PathProgramCache]: Analyzing trace with hash -408885669, now seen corresponding path program 1 times [2022-01-31 22:19:22,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:19:22,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181122595] [2022-01-31 22:19:22,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:19:22,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:19:22,361 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:19:22,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:19:22,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:19:22,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:19:22,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:19:22,376 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:19:22,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181122595] [2022-01-31 22:19:22,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [181122595] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:19:22,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:19:22,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:19:22,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315882553] [2022-01-31 22:19:22,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:19:22,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:19:22,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:19:22,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:19:22,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:19:22,377 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)