/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/locks/test_locks_14-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 04:25:48,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 04:25:48,770 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 04:25:48,804 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 04:25:48,848 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 04:25:48,849 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 04:25:48,850 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 04:25:48,851 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-15 04:25:48,856 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 04:25:48,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 04:25:48,858 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 04:25:48,858 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 04:25:48,858 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 04:25:48,858 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 04:25:48,858 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 04:25:48,858 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 04:25:48,858 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 04:25:48,858 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 04:25:48,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 04:25:48,859 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 04:25:48,859 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 04:25:48,859 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 04:25:48,859 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 04:25:48,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 04:25:48,859 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 04:25:48,859 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 04:25:48,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 04:25:48,859 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-15 04:25:48,860 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 04:25:49,062 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 04:25:49,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 04:25:49,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 04:25:49,085 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 04:25:49,086 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 04:25:49,087 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_14-1.c [2022-02-15 04:25:49,155 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ada333874/ece80eb3c4eb4ca79dd2a044d5f135d0/FLAG575b1f45f [2022-02-15 04:25:49,499 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 04:25:49,500 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_14-1.c [2022-02-15 04:25:49,511 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ada333874/ece80eb3c4eb4ca79dd2a044d5f135d0/FLAG575b1f45f [2022-02-15 04:25:49,912 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ada333874/ece80eb3c4eb4ca79dd2a044d5f135d0 [2022-02-15 04:25:49,914 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 04:25:49,915 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 04:25:49,917 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 04:25:49,917 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 04:25:49,920 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 04:25:49,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 04:25:49" (1/1) ... [2022-02-15 04:25:49,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ba9c5d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:25:49, skipping insertion in model container [2022-02-15 04:25:49,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 04:25:49" (1/1) ... [2022-02-15 04:25:49,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 04:25:49,954 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 04:25:50,117 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_14-1.c[5283,5296] [2022-02-15 04:25:50,119 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 04:25:50,128 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 04:25:50,164 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_14-1.c[5283,5296] [2022-02-15 04:25:50,165 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 04:25:50,176 INFO L208 MainTranslator]: Completed translation [2022-02-15 04:25:50,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:25:50 WrapperNode [2022-02-15 04:25:50,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 04:25:50,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 04:25:50,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 04:25:50,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 04:25:50,185 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:25:50" (1/1) ... [2022-02-15 04:25:50,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:25:50" (1/1) ... [2022-02-15 04:25:50,201 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:25:50" (1/1) ... [2022-02-15 04:25:50,201 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:25:50" (1/1) ... [2022-02-15 04:25:50,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:25:50" (1/1) ... [2022-02-15 04:25:50,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:25:50" (1/1) ... [2022-02-15 04:25:50,211 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:25:50" (1/1) ... [2022-02-15 04:25:50,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 04:25:50,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 04:25:50,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 04:25:50,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 04:25:50,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:25:50" (1/1) ... [2022-02-15 04:25:50,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 04:25:50,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 04:25:50,262 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-15 04:25:50,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-15 04:25:50,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 04:25:50,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 04:25:50,327 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 04:25:50,327 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 04:25:50,327 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 04:25:50,328 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 04:25:50,328 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 04:25:50,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 04:25:50,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-15 04:25:50,329 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 04:25:50,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 04:25:50,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 04:25:50,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 04:25:50,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 04:25:50,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 04:25:50,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 04:25:50,386 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 04:25:50,387 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 04:25:50,553 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 04:25:50,558 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 04:25:50,559 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-15 04:25:50,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 04:25:50 BoogieIcfgContainer [2022-02-15 04:25:50,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 04:25:50,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 04:25:50,562 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 04:25:50,564 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 04:25:50,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 04:25:49" (1/3) ... [2022-02-15 04:25:50,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57e2b140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 04:25:50, skipping insertion in model container [2022-02-15 04:25:50,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:25:50" (2/3) ... [2022-02-15 04:25:50,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57e2b140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 04:25:50, skipping insertion in model container [2022-02-15 04:25:50,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 04:25:50" (3/3) ... [2022-02-15 04:25:50,566 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_14-1.c [2022-02-15 04:25:50,569 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 04:25:50,570 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 04:25:50,603 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 04:25:50,608 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=QVASR [2022-02-15 04:25:50,608 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 04:25:50,627 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 52 states have internal predecessors, (97), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 04:25:50,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 04:25:50,649 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:25:50,650 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:25:50,650 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:25:50,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:25:50,670 INFO L85 PathProgramCache]: Analyzing trace with hash -406532905, now seen corresponding path program 1 times [2022-02-15 04:25:50,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:25:50,679 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813214129] [2022-02-15 04:25:50,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:25:50,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:25:50,743 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:25:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:50,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:25:50,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:25:50,969 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:25:50,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813214129] [2022-02-15 04:25:50,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1813214129] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:25:50,971 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:25:50,971 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:25:50,972 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992357551] [2022-02-15 04:25:50,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:25:50,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:25:50,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:25:51,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:25:51,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:25:51,004 INFO L87 Difference]: Start difference. First operand has 57 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 52 states have internal predecessors, (97), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:51,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:25:51,220 INFO L93 Difference]: Finished difference Result 112 states and 199 transitions. [2022-02-15 04:25:51,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:25:51,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-15 04:25:51,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:25:51,234 INFO L225 Difference]: With dead ends: 112 [2022-02-15 04:25:51,234 INFO L226 Difference]: Without dead ends: 97 [2022-02-15 04:25:51,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:25:51,243 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 242 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:25:51,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 113 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:25:51,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-02-15 04:25:51,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 67. [2022-02-15 04:25:51,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 63 states have (on average 1.8888888888888888) internal successors, (119), 63 states have internal predecessors, (119), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:51,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 122 transitions. [2022-02-15 04:25:51,282 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 122 transitions. Word has length 25 [2022-02-15 04:25:51,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:25:51,282 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 122 transitions. [2022-02-15 04:25:51,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:51,283 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 122 transitions. [2022-02-15 04:25:51,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 04:25:51,283 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:25:51,283 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:25:51,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 04:25:51,284 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:25:51,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:25:51,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1994880807, now seen corresponding path program 1 times [2022-02-15 04:25:51,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:25:51,285 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869378828] [2022-02-15 04:25:51,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:25:51,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:25:51,287 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:25:51,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:51,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:25:51,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:51,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:25:51,367 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:25:51,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869378828] [2022-02-15 04:25:51,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1869378828] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:25:51,367 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:25:51,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:25:51,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011051139] [2022-02-15 04:25:51,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:25:51,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:25:51,368 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:25:51,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:25:51,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:25:51,369 INFO L87 Difference]: Start difference. First operand 67 states and 122 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:51,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:25:51,504 INFO L93 Difference]: Finished difference Result 158 states and 293 transitions. [2022-02-15 04:25:51,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:25:51,504 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-15 04:25:51,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:25:51,505 INFO L225 Difference]: With dead ends: 158 [2022-02-15 04:25:51,506 INFO L226 Difference]: Without dead ends: 97 [2022-02-15 04:25:51,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:25:51,507 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 208 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:25:51,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 127 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:25:51,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-02-15 04:25:51,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2022-02-15 04:25:51,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 91 states have (on average 1.879120879120879) internal successors, (171), 91 states have internal predecessors, (171), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:51,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 174 transitions. [2022-02-15 04:25:51,520 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 174 transitions. Word has length 25 [2022-02-15 04:25:51,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:25:51,520 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 174 transitions. [2022-02-15 04:25:51,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:51,521 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 174 transitions. [2022-02-15 04:25:51,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 04:25:51,521 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:25:51,521 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] [2022-02-15 04:25:51,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 04:25:51,522 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:25:51,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:25:51,522 INFO L85 PathProgramCache]: Analyzing trace with hash 282593920, now seen corresponding path program 1 times [2022-02-15 04:25:51,522 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:25:51,522 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683765037] [2022-02-15 04:25:51,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:25:51,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:25:51,524 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:25:51,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:51,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:25:51,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:51,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:25:51,598 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:25:51,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683765037] [2022-02-15 04:25:51,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1683765037] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:25:51,598 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:25:51,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:25:51,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093774208] [2022-02-15 04:25:51,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:25:51,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:25:51,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:25:51,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:25:51,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:25:51,599 INFO L87 Difference]: Start difference. First operand 95 states and 174 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:51,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:25:51,700 INFO L93 Difference]: Finished difference Result 145 states and 262 transitions. [2022-02-15 04:25:51,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:25:51,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-15 04:25:51,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:25:51,701 INFO L225 Difference]: With dead ends: 145 [2022-02-15 04:25:51,701 INFO L226 Difference]: Without dead ends: 100 [2022-02-15 04:25:51,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:25:51,703 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 183 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:25:51,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 153 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:25:51,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-02-15 04:25:51,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2022-02-15 04:25:51,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 94 states have (on average 1.8404255319148937) internal successors, (173), 94 states have internal predecessors, (173), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:51,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 176 transitions. [2022-02-15 04:25:51,720 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 176 transitions. Word has length 26 [2022-02-15 04:25:51,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:25:51,721 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 176 transitions. [2022-02-15 04:25:51,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:51,721 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 176 transitions. [2022-02-15 04:25:51,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 04:25:51,722 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:25:51,722 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:25:51,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 04:25:51,722 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:25:51,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:25:51,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1711550786, now seen corresponding path program 1 times [2022-02-15 04:25:51,723 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:25:51,723 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492553156] [2022-02-15 04:25:51,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:25:51,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:25:51,725 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:25:51,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:51,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:25:51,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:25:51,780 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:25:51,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492553156] [2022-02-15 04:25:51,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1492553156] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:25:51,780 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:25:51,780 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:25:51,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530253878] [2022-02-15 04:25:51,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:25:51,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:25:51,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:25:51,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:25:51,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:25:51,782 INFO L87 Difference]: Start difference. First operand 98 states and 176 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:51,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:25:51,872 INFO L93 Difference]: Finished difference Result 274 states and 504 transitions. [2022-02-15 04:25:51,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:25:51,872 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-15 04:25:51,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:25:51,874 INFO L225 Difference]: With dead ends: 274 [2022-02-15 04:25:51,874 INFO L226 Difference]: Without dead ends: 185 [2022-02-15 04:25:51,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:25:51,875 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 231 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:25:51,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 103 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:25:51,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-02-15 04:25:51,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2022-02-15 04:25:51,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 179 states have (on average 1.8435754189944134) internal successors, (330), 179 states have internal predecessors, (330), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:51,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 333 transitions. [2022-02-15 04:25:51,890 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 333 transitions. Word has length 26 [2022-02-15 04:25:51,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:25:51,890 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 333 transitions. [2022-02-15 04:25:51,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:51,891 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 333 transitions. [2022-02-15 04:25:51,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 04:25:51,891 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:25:51,891 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:25:51,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 04:25:51,892 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:25:51,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:25:51,892 INFO L85 PathProgramCache]: Analyzing trace with hash -123202884, now seen corresponding path program 1 times [2022-02-15 04:25:51,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:25:51,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601829814] [2022-02-15 04:25:51,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:25:51,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:25:51,894 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:25:51,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:51,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:25:51,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:25:51,926 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:25:51,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601829814] [2022-02-15 04:25:51,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [601829814] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:25:51,926 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:25:51,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:25:51,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592236723] [2022-02-15 04:25:51,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:25:51,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:25:51,927 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:25:51,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:25:51,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:25:51,927 INFO L87 Difference]: Start difference. First operand 183 states and 333 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:52,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:25:52,019 INFO L93 Difference]: Finished difference Result 239 states and 435 transitions. [2022-02-15 04:25:52,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:25:52,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-15 04:25:52,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:25:52,021 INFO L225 Difference]: With dead ends: 239 [2022-02-15 04:25:52,021 INFO L226 Difference]: Without dead ends: 237 [2022-02-15 04:25:52,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:25:52,022 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 150 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:25:52,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 176 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:25:52,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-02-15 04:25:52,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 183. [2022-02-15 04:25:52,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 179 states have (on average 1.8324022346368716) internal successors, (328), 179 states have internal predecessors, (328), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:52,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 331 transitions. [2022-02-15 04:25:52,038 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 331 transitions. Word has length 26 [2022-02-15 04:25:52,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:25:52,039 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 331 transitions. [2022-02-15 04:25:52,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:52,039 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 331 transitions. [2022-02-15 04:25:52,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-15 04:25:52,040 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:25:52,040 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:25:52,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 04:25:52,040 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:25:52,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:25:52,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1518254386, now seen corresponding path program 1 times [2022-02-15 04:25:52,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:25:52,041 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236280106] [2022-02-15 04:25:52,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:25:52,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:25:52,042 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:25:52,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:52,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:25:52,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:52,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:25:52,070 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:25:52,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236280106] [2022-02-15 04:25:52,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1236280106] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:25:52,071 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:25:52,071 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:25:52,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063298263] [2022-02-15 04:25:52,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:25:52,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:25:52,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:25:52,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:25:52,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:25:52,072 INFO L87 Difference]: Start difference. First operand 183 states and 331 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:52,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:25:52,171 INFO L93 Difference]: Finished difference Result 347 states and 635 transitions. [2022-02-15 04:25:52,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:25:52,171 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-02-15 04:25:52,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:25:52,173 INFO L225 Difference]: With dead ends: 347 [2022-02-15 04:25:52,173 INFO L226 Difference]: Without dead ends: 345 [2022-02-15 04:25:52,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:25:52,174 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 222 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:25:52,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 100 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:25:52,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-02-15 04:25:52,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 247. [2022-02-15 04:25:52,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 243 states have (on average 1.8189300411522633) internal successors, (442), 243 states have internal predecessors, (442), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:52,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 445 transitions. [2022-02-15 04:25:52,194 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 445 transitions. Word has length 27 [2022-02-15 04:25:52,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:25:52,195 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 445 transitions. [2022-02-15 04:25:52,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:52,195 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 445 transitions. [2022-02-15 04:25:52,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-15 04:25:52,196 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:25:52,196 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:25:52,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 04:25:52,196 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:25:52,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:25:52,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1188365008, now seen corresponding path program 1 times [2022-02-15 04:25:52,197 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:25:52,197 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527701508] [2022-02-15 04:25:52,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:25:52,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:25:52,198 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:25:52,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:52,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:25:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:52,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:25:52,225 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:25:52,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527701508] [2022-02-15 04:25:52,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [527701508] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:25:52,226 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:25:52,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:25:52,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888215847] [2022-02-15 04:25:52,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:25:52,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:25:52,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:25:52,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:25:52,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:25:52,227 INFO L87 Difference]: Start difference. First operand 247 states and 445 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:52,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:25:52,337 INFO L93 Difference]: Finished difference Result 591 states and 1075 transitions. [2022-02-15 04:25:52,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:25:52,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-02-15 04:25:52,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:25:52,339 INFO L225 Difference]: With dead ends: 591 [2022-02-15 04:25:52,339 INFO L226 Difference]: Without dead ends: 353 [2022-02-15 04:25:52,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:25:52,340 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 196 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:25:52,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 131 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:25:52,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-02-15 04:25:52,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 351. [2022-02-15 04:25:52,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 347 states have (on average 1.8097982708933718) internal successors, (628), 347 states have internal predecessors, (628), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:52,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 631 transitions. [2022-02-15 04:25:52,365 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 631 transitions. Word has length 27 [2022-02-15 04:25:52,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:25:52,365 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 631 transitions. [2022-02-15 04:25:52,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:52,365 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 631 transitions. [2022-02-15 04:25:52,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 04:25:52,367 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:25:52,367 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:25:52,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 04:25:52,367 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:25:52,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:25:52,367 INFO L85 PathProgramCache]: Analyzing trace with hash 178967059, now seen corresponding path program 1 times [2022-02-15 04:25:52,367 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:25:52,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611000772] [2022-02-15 04:25:52,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:25:52,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:25:52,369 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:25:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:52,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:25:52,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:52,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:25:52,395 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:25:52,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611000772] [2022-02-15 04:25:52,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [611000772] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:25:52,395 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:25:52,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:25:52,396 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173740851] [2022-02-15 04:25:52,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:25:52,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:25:52,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:25:52,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:25:52,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:25:52,396 INFO L87 Difference]: Start difference. First operand 351 states and 631 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:52,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:25:52,490 INFO L93 Difference]: Finished difference Result 529 states and 949 transitions. [2022-02-15 04:25:52,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:25:52,490 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-15 04:25:52,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:25:52,492 INFO L225 Difference]: With dead ends: 529 [2022-02-15 04:25:52,492 INFO L226 Difference]: Without dead ends: 359 [2022-02-15 04:25:52,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:25:52,493 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 [2022-02-15 04:25:52,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 147 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:25:52,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-02-15 04:25:52,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 357. [2022-02-15 04:25:52,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 353 states have (on average 1.7903682719546743) internal successors, (632), 353 states have internal predecessors, (632), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:52,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 635 transitions. [2022-02-15 04:25:52,515 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 635 transitions. Word has length 28 [2022-02-15 04:25:52,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:25:52,516 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 635 transitions. [2022-02-15 04:25:52,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:52,516 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 635 transitions. [2022-02-15 04:25:52,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 04:25:52,517 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:25:52,517 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:25:52,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 04:25:52,517 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:25:52,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:25:52,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1815177647, now seen corresponding path program 1 times [2022-02-15 04:25:52,518 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:25:52,518 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527173543] [2022-02-15 04:25:52,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:25:52,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:25:52,519 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:25:52,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:52,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:25:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:52,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:25:52,545 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:25:52,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527173543] [2022-02-15 04:25:52,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1527173543] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:25:52,545 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:25:52,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:25:52,546 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102772975] [2022-02-15 04:25:52,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:25:52,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:25:52,546 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:25:52,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:25:52,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:25:52,546 INFO L87 Difference]: Start difference. First operand 357 states and 635 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:52,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:25:52,656 INFO L93 Difference]: Finished difference Result 669 states and 1205 transitions. [2022-02-15 04:25:52,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:25:52,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-15 04:25:52,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:25:52,659 INFO L225 Difference]: With dead ends: 669 [2022-02-15 04:25:52,659 INFO L226 Difference]: Without dead ends: 667 [2022-02-15 04:25:52,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:25:52,660 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 215 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:25:52,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 99 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:25:52,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-02-15 04:25:52,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 489. [2022-02-15 04:25:52,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 485 states have (on average 1.7649484536082474) internal successors, (856), 485 states have internal predecessors, (856), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:52,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 859 transitions. [2022-02-15 04:25:52,698 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 859 transitions. Word has length 28 [2022-02-15 04:25:52,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:25:52,699 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 859 transitions. [2022-02-15 04:25:52,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:52,699 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 859 transitions. [2022-02-15 04:25:52,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 04:25:52,700 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:25:52,700 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:25:52,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 04:25:52,700 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:25:52,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:25:52,701 INFO L85 PathProgramCache]: Analyzing trace with hash 891441747, now seen corresponding path program 1 times [2022-02-15 04:25:52,701 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:25:52,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770086031] [2022-02-15 04:25:52,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:25:52,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:25:52,702 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:25:52,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:52,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:25:52,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:52,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:25:52,726 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:25:52,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770086031] [2022-02-15 04:25:52,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1770086031] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:25:52,726 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:25:52,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:25:52,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178201360] [2022-02-15 04:25:52,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:25:52,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:25:52,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:25:52,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:25:52,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:25:52,727 INFO L87 Difference]: Start difference. First operand 489 states and 859 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:52,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:25:52,839 INFO L93 Difference]: Finished difference Result 1165 states and 2061 transitions. [2022-02-15 04:25:52,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:25:52,839 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-15 04:25:52,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:25:52,842 INFO L225 Difference]: With dead ends: 1165 [2022-02-15 04:25:52,842 INFO L226 Difference]: Without dead ends: 691 [2022-02-15 04:25:52,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:25:52,843 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 190 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:25:52,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 133 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:25:52,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-02-15 04:25:52,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 689. [2022-02-15 04:25:52,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 685 states have (on average 1.7576642335766424) internal successors, (1204), 685 states have internal predecessors, (1204), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:52,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1207 transitions. [2022-02-15 04:25:52,885 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1207 transitions. Word has length 28 [2022-02-15 04:25:52,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:25:52,886 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 1207 transitions. [2022-02-15 04:25:52,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:52,886 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1207 transitions. [2022-02-15 04:25:52,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 04:25:52,887 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:25:52,887 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:25:52,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 04:25:52,887 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:25:52,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:25:52,888 INFO L85 PathProgramCache]: Analyzing trace with hash -435719099, now seen corresponding path program 1 times [2022-02-15 04:25:52,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:25:52,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145538741] [2022-02-15 04:25:52,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:25:52,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:25:52,889 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:25:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:52,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:25:52,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:52,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:25:52,913 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:25:52,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145538741] [2022-02-15 04:25:52,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [145538741] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:25:52,913 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:25:52,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:25:52,914 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555847323] [2022-02-15 04:25:52,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:25:52,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:25:52,914 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:25:52,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:25:52,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:25:52,915 INFO L87 Difference]: Start difference. First operand 689 states and 1207 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:53,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:25:53,045 INFO L93 Difference]: Finished difference Result 1033 states and 1805 transitions. [2022-02-15 04:25:53,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:25:53,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-15 04:25:53,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:25:53,047 INFO L225 Difference]: With dead ends: 1033 [2022-02-15 04:25:53,048 INFO L226 Difference]: Without dead ends: 699 [2022-02-15 04:25:53,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:25:53,049 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 180 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:25:53,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 144 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:25:53,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-02-15 04:25:53,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 697. [2022-02-15 04:25:53,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 693 states have (on average 1.7373737373737375) internal successors, (1204), 693 states have internal predecessors, (1204), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:53,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1207 transitions. [2022-02-15 04:25:53,090 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1207 transitions. Word has length 29 [2022-02-15 04:25:53,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:25:53,090 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 1207 transitions. [2022-02-15 04:25:53,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:53,090 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1207 transitions. [2022-02-15 04:25:53,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 04:25:53,091 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:25:53,091 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, 1, 1] [2022-02-15 04:25:53,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 04:25:53,091 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:25:53,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:25:53,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1865103491, now seen corresponding path program 1 times [2022-02-15 04:25:53,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:25:53,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055422453] [2022-02-15 04:25:53,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:25:53,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:25:53,093 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:25:53,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:53,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:25:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:53,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:25:53,116 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:25:53,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055422453] [2022-02-15 04:25:53,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1055422453] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:25:53,116 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:25:53,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:25:53,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102682525] [2022-02-15 04:25:53,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:25:53,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:25:53,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:25:53,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:25:53,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:25:53,117 INFO L87 Difference]: Start difference. First operand 697 states and 1207 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:53,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:25:53,251 INFO L93 Difference]: Finished difference Result 1293 states and 2273 transitions. [2022-02-15 04:25:53,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:25:53,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-15 04:25:53,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:25:53,255 INFO L225 Difference]: With dead ends: 1293 [2022-02-15 04:25:53,256 INFO L226 Difference]: Without dead ends: 1291 [2022-02-15 04:25:53,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:25:53,256 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 208 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:25:53,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 98 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:25:53,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2022-02-15 04:25:53,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 969. [2022-02-15 04:25:53,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 965 states have (on average 1.7036269430051814) internal successors, (1644), 965 states have internal predecessors, (1644), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:53,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1647 transitions. [2022-02-15 04:25:53,340 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1647 transitions. Word has length 29 [2022-02-15 04:25:53,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:25:53,340 INFO L470 AbstractCegarLoop]: Abstraction has 969 states and 1647 transitions. [2022-02-15 04:25:53,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:53,340 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1647 transitions. [2022-02-15 04:25:53,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 04:25:53,341 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:25:53,341 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:25:53,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 04:25:53,341 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:25:53,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:25:53,342 INFO L85 PathProgramCache]: Analyzing trace with hash 276755589, now seen corresponding path program 1 times [2022-02-15 04:25:53,342 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:25:53,342 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282896162] [2022-02-15 04:25:53,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:25:53,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:25:53,343 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:25:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:53,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:25:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:53,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:25:53,363 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:25:53,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282896162] [2022-02-15 04:25:53,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1282896162] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:25:53,364 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:25:53,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:25:53,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418018684] [2022-02-15 04:25:53,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:25:53,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:25:53,364 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:25:53,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:25:53,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:25:53,365 INFO L87 Difference]: Start difference. First operand 969 states and 1647 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:53,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:25:53,516 INFO L93 Difference]: Finished difference Result 2301 states and 3937 transitions. [2022-02-15 04:25:53,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:25:53,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-15 04:25:53,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:25:53,520 INFO L225 Difference]: With dead ends: 2301 [2022-02-15 04:25:53,521 INFO L226 Difference]: Without dead ends: 1355 [2022-02-15 04:25:53,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:25:53,523 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 184 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:25:53,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 135 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:25:53,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2022-02-15 04:25:53,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1353. [2022-02-15 04:25:53,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1349 states have (on average 1.6990363232023722) internal successors, (2292), 1349 states have internal predecessors, (2292), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:53,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 2295 transitions. [2022-02-15 04:25:53,619 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 2295 transitions. Word has length 29 [2022-02-15 04:25:53,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:25:53,620 INFO L470 AbstractCegarLoop]: Abstraction has 1353 states and 2295 transitions. [2022-02-15 04:25:53,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:53,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 2295 transitions. [2022-02-15 04:25:53,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 04:25:53,621 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:25:53,621 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:25:53,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 04:25:53,621 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:25:53,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:25:53,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1983846824, now seen corresponding path program 1 times [2022-02-15 04:25:53,622 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:25:53,622 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479185617] [2022-02-15 04:25:53,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:25:53,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:25:53,623 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:25:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:53,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:25:53,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:25:53,644 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:25:53,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479185617] [2022-02-15 04:25:53,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [479185617] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:25:53,644 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:25:53,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:25:53,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442247724] [2022-02-15 04:25:53,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:25:53,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:25:53,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:25:53,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:25:53,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:25:53,645 INFO L87 Difference]: Start difference. First operand 1353 states and 2295 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:53,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:25:53,806 INFO L93 Difference]: Finished difference Result 2029 states and 3433 transitions. [2022-02-15 04:25:53,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:25:53,806 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-15 04:25:53,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:25:53,810 INFO L225 Difference]: With dead ends: 2029 [2022-02-15 04:25:53,810 INFO L226 Difference]: Without dead ends: 1371 [2022-02-15 04:25:53,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:25:53,812 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 179 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:25:53,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 141 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:25:53,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2022-02-15 04:25:53,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1369. [2022-02-15 04:25:53,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1365 states have (on average 1.6791208791208792) internal successors, (2292), 1365 states have internal predecessors, (2292), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:53,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2295 transitions. [2022-02-15 04:25:53,899 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2295 transitions. Word has length 30 [2022-02-15 04:25:53,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:25:53,899 INFO L470 AbstractCegarLoop]: Abstraction has 1369 states and 2295 transitions. [2022-02-15 04:25:53,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:53,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2295 transitions. [2022-02-15 04:25:53,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 04:25:53,900 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:25:53,900 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:25:53,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 04:25:53,900 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:25:53,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:25:53,901 INFO L85 PathProgramCache]: Analyzing trace with hash -10297882, now seen corresponding path program 1 times [2022-02-15 04:25:53,901 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:25:53,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973447530] [2022-02-15 04:25:53,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:25:53,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:25:53,902 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:25:53,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:53,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:25:53,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:53,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:25:53,922 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:25:53,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973447530] [2022-02-15 04:25:53,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [973447530] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:25:53,923 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:25:53,923 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:25:53,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797659630] [2022-02-15 04:25:53,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:25:53,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:25:53,923 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:25:53,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:25:53,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:25:53,924 INFO L87 Difference]: Start difference. First operand 1369 states and 2295 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:54,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:25:54,140 INFO L93 Difference]: Finished difference Result 2509 states and 4281 transitions. [2022-02-15 04:25:54,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:25:54,140 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-15 04:25:54,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:25:54,148 INFO L225 Difference]: With dead ends: 2509 [2022-02-15 04:25:54,148 INFO L226 Difference]: Without dead ends: 2507 [2022-02-15 04:25:54,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:25:54,150 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 201 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:25:54,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 97 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:25:54,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2022-02-15 04:25:54,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 1929. [2022-02-15 04:25:54,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1925 states have (on average 1.6394805194805195) internal successors, (3156), 1925 states have internal predecessors, (3156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:54,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 3159 transitions. [2022-02-15 04:25:54,318 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 3159 transitions. Word has length 30 [2022-02-15 04:25:54,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:25:54,319 INFO L470 AbstractCegarLoop]: Abstraction has 1929 states and 3159 transitions. [2022-02-15 04:25:54,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:54,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 3159 transitions. [2022-02-15 04:25:54,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 04:25:54,321 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:25:54,321 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:25:54,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 04:25:54,321 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:25:54,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:25:54,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1598645784, now seen corresponding path program 1 times [2022-02-15 04:25:54,321 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:25:54,321 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89683914] [2022-02-15 04:25:54,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:25:54,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:25:54,322 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:25:54,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:54,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:25:54,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:54,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:25:54,343 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:25:54,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89683914] [2022-02-15 04:25:54,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [89683914] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:25:54,343 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:25:54,343 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:25:54,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723007954] [2022-02-15 04:25:54,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:25:54,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:25:54,344 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:25:54,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:25:54,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:25:54,344 INFO L87 Difference]: Start difference. First operand 1929 states and 3159 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:54,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:25:54,632 INFO L93 Difference]: Finished difference Result 4557 states and 7513 transitions. [2022-02-15 04:25:54,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:25:54,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-15 04:25:54,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:25:54,640 INFO L225 Difference]: With dead ends: 4557 [2022-02-15 04:25:54,640 INFO L226 Difference]: Without dead ends: 2667 [2022-02-15 04:25:54,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:25:54,644 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 178 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:25:54,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 137 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:25:54,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2022-02-15 04:25:54,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 2665. [2022-02-15 04:25:54,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2665 states, 2661 states have (on average 1.636978579481398) internal successors, (4356), 2661 states have internal predecessors, (4356), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:54,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2665 states to 2665 states and 4359 transitions. [2022-02-15 04:25:54,858 INFO L78 Accepts]: Start accepts. Automaton has 2665 states and 4359 transitions. Word has length 30 [2022-02-15 04:25:54,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:25:54,858 INFO L470 AbstractCegarLoop]: Abstraction has 2665 states and 4359 transitions. [2022-02-15 04:25:54,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:54,859 INFO L276 IsEmpty]: Start isEmpty. Operand 2665 states and 4359 transitions. [2022-02-15 04:25:54,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 04:25:54,860 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:25:54,860 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:25:54,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 04:25:54,861 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:25:54,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:25:54,861 INFO L85 PathProgramCache]: Analyzing trace with hash -319020550, now seen corresponding path program 1 times [2022-02-15 04:25:54,861 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:25:54,861 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348213562] [2022-02-15 04:25:54,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:25:54,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:25:54,862 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:25:54,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:54,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:25:54,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:25:54,880 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:25:54,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348213562] [2022-02-15 04:25:54,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [348213562] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:25:54,880 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:25:54,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:25:54,881 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579859347] [2022-02-15 04:25:54,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:25:54,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:25:54,881 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:25:54,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:25:54,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:25:54,881 INFO L87 Difference]: Start difference. First operand 2665 states and 4359 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:55,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:25:55,156 INFO L93 Difference]: Finished difference Result 3997 states and 6521 transitions. [2022-02-15 04:25:55,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:25:55,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-15 04:25:55,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:25:55,164 INFO L225 Difference]: With dead ends: 3997 [2022-02-15 04:25:55,164 INFO L226 Difference]: Without dead ends: 2699 [2022-02-15 04:25:55,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:25:55,167 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 178 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:25:55,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 138 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:25:55,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2022-02-15 04:25:55,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 2697. [2022-02-15 04:25:55,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2697 states, 2693 states have (on average 1.617526921648719) internal successors, (4356), 2693 states have internal predecessors, (4356), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:55,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2697 states to 2697 states and 4359 transitions. [2022-02-15 04:25:55,386 INFO L78 Accepts]: Start accepts. Automaton has 2697 states and 4359 transitions. Word has length 31 [2022-02-15 04:25:55,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:25:55,386 INFO L470 AbstractCegarLoop]: Abstraction has 2697 states and 4359 transitions. [2022-02-15 04:25:55,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:55,386 INFO L276 IsEmpty]: Start isEmpty. Operand 2697 states and 4359 transitions. [2022-02-15 04:25:55,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 04:25:55,388 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:25:55,389 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:25:55,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 04:25:55,389 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:25:55,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:25:55,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1981802040, now seen corresponding path program 1 times [2022-02-15 04:25:55,389 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:25:55,389 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161297744] [2022-02-15 04:25:55,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:25:55,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:25:55,390 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:25:55,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:55,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:25:55,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:55,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:25:55,411 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:25:55,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161297744] [2022-02-15 04:25:55,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1161297744] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:25:55,411 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:25:55,412 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:25:55,412 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848213419] [2022-02-15 04:25:55,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:25:55,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:25:55,412 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:25:55,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:25:55,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:25:55,412 INFO L87 Difference]: Start difference. First operand 2697 states and 4359 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:55,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:25:55,837 INFO L93 Difference]: Finished difference Result 4877 states and 8041 transitions. [2022-02-15 04:25:55,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:25:55,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-15 04:25:55,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:25:55,851 INFO L225 Difference]: With dead ends: 4877 [2022-02-15 04:25:55,851 INFO L226 Difference]: Without dead ends: 4875 [2022-02-15 04:25:55,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:25:55,853 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 194 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:25:55,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 96 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:25:55,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2022-02-15 04:25:56,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 3849. [2022-02-15 04:25:56,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3849 states, 3845 states have (on average 1.5739921976592979) internal successors, (6052), 3845 states have internal predecessors, (6052), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:56,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3849 states to 3849 states and 6055 transitions. [2022-02-15 04:25:56,144 INFO L78 Accepts]: Start accepts. Automaton has 3849 states and 6055 transitions. Word has length 31 [2022-02-15 04:25:56,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:25:56,144 INFO L470 AbstractCegarLoop]: Abstraction has 3849 states and 6055 transitions. [2022-02-15 04:25:56,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:56,145 INFO L276 IsEmpty]: Start isEmpty. Operand 3849 states and 6055 transitions. [2022-02-15 04:25:56,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 04:25:56,148 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:25:56,148 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:25:56,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 04:25:56,148 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:25:56,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:25:56,148 INFO L85 PathProgramCache]: Analyzing trace with hash 393454138, now seen corresponding path program 1 times [2022-02-15 04:25:56,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:25:56,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069004359] [2022-02-15 04:25:56,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:25:56,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:25:56,149 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:25:56,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:56,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:25:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:56,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:25:56,167 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:25:56,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069004359] [2022-02-15 04:25:56,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1069004359] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:25:56,168 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:25:56,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:25:56,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21098046] [2022-02-15 04:25:56,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:25:56,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:25:56,168 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:25:56,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:25:56,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:25:56,168 INFO L87 Difference]: Start difference. First operand 3849 states and 6055 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:56,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:25:56,590 INFO L93 Difference]: Finished difference Result 9037 states and 14313 transitions. [2022-02-15 04:25:56,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:25:56,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-15 04:25:56,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:25:56,605 INFO L225 Difference]: With dead ends: 9037 [2022-02-15 04:25:56,605 INFO L226 Difference]: Without dead ends: 5259 [2022-02-15 04:25:56,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:25:56,613 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 [2022-02-15 04:25:56,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 139 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:25:56,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5259 states. [2022-02-15 04:25:57,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5259 to 5257. [2022-02-15 04:25:57,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5257 states, 5253 states have (on average 1.5724347991623835) internal successors, (8260), 5253 states have internal predecessors, (8260), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:57,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5257 states to 5257 states and 8263 transitions. [2022-02-15 04:25:57,057 INFO L78 Accepts]: Start accepts. Automaton has 5257 states and 8263 transitions. Word has length 31 [2022-02-15 04:25:57,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:25:57,057 INFO L470 AbstractCegarLoop]: Abstraction has 5257 states and 8263 transitions. [2022-02-15 04:25:57,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:57,057 INFO L276 IsEmpty]: Start isEmpty. Operand 5257 states and 8263 transitions. [2022-02-15 04:25:57,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 04:25:57,061 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:25:57,061 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:25:57,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 04:25:57,061 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:25:57,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:25:57,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1306535229, now seen corresponding path program 1 times [2022-02-15 04:25:57,062 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:25:57,062 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405571755] [2022-02-15 04:25:57,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:25:57,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:25:57,063 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:25:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:57,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:25:57,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:57,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:25:57,082 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:25:57,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405571755] [2022-02-15 04:25:57,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [405571755] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:25:57,083 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:25:57,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:25:57,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719631716] [2022-02-15 04:25:57,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:25:57,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:25:57,083 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:25:57,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:25:57,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:25:57,084 INFO L87 Difference]: Start difference. First operand 5257 states and 8263 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:57,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:25:57,635 INFO L93 Difference]: Finished difference Result 7885 states and 12361 transitions. [2022-02-15 04:25:57,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:25:57,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-15 04:25:57,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:25:57,647 INFO L225 Difference]: With dead ends: 7885 [2022-02-15 04:25:57,647 INFO L226 Difference]: Without dead ends: 5323 [2022-02-15 04:25:57,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:25:57,655 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 177 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:25:57,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 135 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:25:57,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5323 states. [2022-02-15 04:25:58,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5323 to 5321. [2022-02-15 04:25:58,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5321 states, 5317 states have (on average 1.5535076170772992) internal successors, (8260), 5317 states have internal predecessors, (8260), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:58,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5321 states to 5321 states and 8263 transitions. [2022-02-15 04:25:58,077 INFO L78 Accepts]: Start accepts. Automaton has 5321 states and 8263 transitions. Word has length 32 [2022-02-15 04:25:58,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:25:58,077 INFO L470 AbstractCegarLoop]: Abstraction has 5321 states and 8263 transitions. [2022-02-15 04:25:58,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:58,077 INFO L276 IsEmpty]: Start isEmpty. Operand 5321 states and 8263 transitions. [2022-02-15 04:25:58,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 04:25:58,081 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:25:58,081 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, 1, 1, 1] [2022-02-15 04:25:58,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 04:25:58,081 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:25:58,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:25:58,081 INFO L85 PathProgramCache]: Analyzing trace with hash -687609477, now seen corresponding path program 1 times [2022-02-15 04:25:58,081 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:25:58,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643087030] [2022-02-15 04:25:58,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:25:58,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:25:58,084 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:25:58,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:58,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:25:58,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:58,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:25:58,114 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:25:58,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643087030] [2022-02-15 04:25:58,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [643087030] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:25:58,114 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:25:58,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:25:58,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973302876] [2022-02-15 04:25:58,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:25:58,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:25:58,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:25:58,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:25:58,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:25:58,115 INFO L87 Difference]: Start difference. First operand 5321 states and 8263 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:58,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:25:58,873 INFO L93 Difference]: Finished difference Result 9485 states and 15049 transitions. [2022-02-15 04:25:58,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:25:58,873 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-15 04:25:58,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:25:58,893 INFO L225 Difference]: With dead ends: 9485 [2022-02-15 04:25:58,893 INFO L226 Difference]: Without dead ends: 9483 [2022-02-15 04:25:58,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:25:58,898 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 [2022-02-15 04:25:58,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 95 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:25:58,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9483 states. [2022-02-15 04:25:59,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9483 to 7689. [2022-02-15 04:25:59,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7689 states, 7685 states have (on average 1.5078724788549123) internal successors, (11588), 7685 states have internal predecessors, (11588), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:59,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7689 states to 7689 states and 11591 transitions. [2022-02-15 04:25:59,567 INFO L78 Accepts]: Start accepts. Automaton has 7689 states and 11591 transitions. Word has length 32 [2022-02-15 04:25:59,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:25:59,568 INFO L470 AbstractCegarLoop]: Abstraction has 7689 states and 11591 transitions. [2022-02-15 04:25:59,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:59,568 INFO L276 IsEmpty]: Start isEmpty. Operand 7689 states and 11591 transitions. [2022-02-15 04:25:59,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 04:25:59,575 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:25:59,575 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:25:59,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 04:25:59,575 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:25:59,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:25:59,576 INFO L85 PathProgramCache]: Analyzing trace with hash 2019009917, now seen corresponding path program 1 times [2022-02-15 04:25:59,581 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:25:59,581 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383726448] [2022-02-15 04:25:59,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:25:59,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:25:59,582 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:25:59,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:59,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:25:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:59,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:25:59,598 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:25:59,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383726448] [2022-02-15 04:25:59,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [383726448] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:25:59,598 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:25:59,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:25:59,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41757163] [2022-02-15 04:25:59,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:25:59,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:25:59,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:25:59,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:25:59,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:25:59,599 INFO L87 Difference]: Start difference. First operand 7689 states and 11591 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:00,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:00,588 INFO L93 Difference]: Finished difference Result 17933 states and 27209 transitions. [2022-02-15 04:26:00,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:00,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-15 04:26:00,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:00,625 INFO L225 Difference]: With dead ends: 17933 [2022-02-15 04:26:00,625 INFO L226 Difference]: Without dead ends: 10379 [2022-02-15 04:26:00,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:26:00,643 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 166 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:26:00,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 141 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:00,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10379 states. [2022-02-15 04:26:01,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10379 to 10377. [2022-02-15 04:26:01,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10377 states, 10373 states have (on average 1.5058324496288442) internal successors, (15620), 10373 states have internal predecessors, (15620), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:01,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10377 states to 10377 states and 15623 transitions. [2022-02-15 04:26:01,656 INFO L78 Accepts]: Start accepts. Automaton has 10377 states and 15623 transitions. Word has length 32 [2022-02-15 04:26:01,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:01,656 INFO L470 AbstractCegarLoop]: Abstraction has 10377 states and 15623 transitions. [2022-02-15 04:26:01,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:01,657 INFO L276 IsEmpty]: Start isEmpty. Operand 10377 states and 15623 transitions. [2022-02-15 04:26:01,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 04:26:01,668 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:01,668 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:26:01,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 04:26:01,669 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:01,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:01,669 INFO L85 PathProgramCache]: Analyzing trace with hash 159157167, now seen corresponding path program 1 times [2022-02-15 04:26:01,669 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:01,669 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749703812] [2022-02-15 04:26:01,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:01,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:01,670 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:01,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:01,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:26:01,693 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:01,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749703812] [2022-02-15 04:26:01,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1749703812] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:01,693 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:01,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:01,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69096770] [2022-02-15 04:26:01,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:01,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:01,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:01,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:01,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:01,694 INFO L87 Difference]: Start difference. First operand 10377 states and 15623 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:02,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:02,726 INFO L93 Difference]: Finished difference Result 15565 states and 23369 transitions. [2022-02-15 04:26:02,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:02,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-15 04:26:02,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:02,744 INFO L225 Difference]: With dead ends: 15565 [2022-02-15 04:26:02,744 INFO L226 Difference]: Without dead ends: 10507 [2022-02-15 04:26:02,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:26:02,756 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 176 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:26:02,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 132 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:02,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10507 states. [2022-02-15 04:26:03,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10507 to 10505. [2022-02-15 04:26:03,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10505 states, 10501 states have (on average 1.4874773831063708) internal successors, (15620), 10501 states have internal predecessors, (15620), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:03,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10505 states to 10505 states and 15623 transitions. [2022-02-15 04:26:03,804 INFO L78 Accepts]: Start accepts. Automaton has 10505 states and 15623 transitions. Word has length 33 [2022-02-15 04:26:03,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:03,804 INFO L470 AbstractCegarLoop]: Abstraction has 10505 states and 15623 transitions. [2022-02-15 04:26:03,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:03,805 INFO L276 IsEmpty]: Start isEmpty. Operand 10505 states and 15623 transitions. [2022-02-15 04:26:03,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 04:26:03,814 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:03,814 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:26:03,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 04:26:03,814 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:03,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:03,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1834987539, now seen corresponding path program 1 times [2022-02-15 04:26:03,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:03,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910808466] [2022-02-15 04:26:03,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:03,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:03,816 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:03,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:03,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:26:03,834 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:03,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910808466] [2022-02-15 04:26:03,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1910808466] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:03,834 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:03,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:03,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812589253] [2022-02-15 04:26:03,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:03,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:03,835 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:03,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:03,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:03,835 INFO L87 Difference]: Start difference. First operand 10505 states and 15623 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:05,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:05,417 INFO L93 Difference]: Finished difference Result 18445 states and 28041 transitions. [2022-02-15 04:26:05,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:05,418 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-15 04:26:05,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:05,448 INFO L225 Difference]: With dead ends: 18445 [2022-02-15 04:26:05,448 INFO L226 Difference]: Without dead ends: 18443 [2022-02-15 04:26:05,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:26:05,455 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 [2022-02-15 04:26:05,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 94 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:05,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18443 states. [2022-02-15 04:26:06,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18443 to 15369. [2022-02-15 04:26:06,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15369 states, 15365 states have (on average 1.4414578587699316) internal successors, (22148), 15365 states have internal predecessors, (22148), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:06,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15369 states to 15369 states and 22151 transitions. [2022-02-15 04:26:06,834 INFO L78 Accepts]: Start accepts. Automaton has 15369 states and 22151 transitions. Word has length 33 [2022-02-15 04:26:06,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:06,834 INFO L470 AbstractCegarLoop]: Abstraction has 15369 states and 22151 transitions. [2022-02-15 04:26:06,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:06,834 INFO L276 IsEmpty]: Start isEmpty. Operand 15369 states and 22151 transitions. [2022-02-15 04:26:06,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 04:26:06,848 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:06,848 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:26:06,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 04:26:06,848 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:06,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:06,848 INFO L85 PathProgramCache]: Analyzing trace with hash 871631855, now seen corresponding path program 1 times [2022-02-15 04:26:06,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:06,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444540095] [2022-02-15 04:26:06,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:06,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:06,850 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:06,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:06,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:06,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:26:06,865 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:06,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444540095] [2022-02-15 04:26:06,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [444540095] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:06,866 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:06,866 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:06,866 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105251548] [2022-02-15 04:26:06,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:06,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:06,866 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:06,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:06,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:06,867 INFO L87 Difference]: Start difference. First operand 15369 states and 22151 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:08,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:08,746 INFO L93 Difference]: Finished difference Result 35597 states and 51593 transitions. [2022-02-15 04:26:08,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:08,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-15 04:26:08,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:08,778 INFO L225 Difference]: With dead ends: 35597 [2022-02-15 04:26:08,778 INFO L226 Difference]: Without dead ends: 20491 [2022-02-15 04:26:08,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:26:08,807 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 160 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:26:08,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 143 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:08,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20491 states. [2022-02-15 04:26:10,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20491 to 20489. [2022-02-15 04:26:10,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20489 states, 20485 states have (on average 1.437344398340249) internal successors, (29444), 20485 states have internal predecessors, (29444), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:10,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20489 states to 20489 states and 29447 transitions. [2022-02-15 04:26:10,660 INFO L78 Accepts]: Start accepts. Automaton has 20489 states and 29447 transitions. Word has length 33 [2022-02-15 04:26:10,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:10,660 INFO L470 AbstractCegarLoop]: Abstraction has 20489 states and 29447 transitions. [2022-02-15 04:26:10,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:10,661 INFO L276 IsEmpty]: Start isEmpty. Operand 20489 states and 29447 transitions. [2022-02-15 04:26:10,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 04:26:10,678 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:10,678 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:26:10,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 04:26:10,679 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:10,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:10,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1049824046, now seen corresponding path program 1 times [2022-02-15 04:26:10,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:10,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884833493] [2022-02-15 04:26:10,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:10,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:10,681 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:10,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:10,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:10,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:26:10,719 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:10,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884833493] [2022-02-15 04:26:10,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1884833493] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:10,720 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:10,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:10,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905070224] [2022-02-15 04:26:10,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:10,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:10,720 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:10,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:10,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:10,721 INFO L87 Difference]: Start difference. First operand 20489 states and 29447 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:12,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:12,900 INFO L93 Difference]: Finished difference Result 30733 states and 44041 transitions. [2022-02-15 04:26:12,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:12,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-15 04:26:12,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:12,945 INFO L225 Difference]: With dead ends: 30733 [2022-02-15 04:26:12,946 INFO L226 Difference]: Without dead ends: 20747 [2022-02-15 04:26:12,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:26:12,968 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 175 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:26:12,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 129 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:12,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20747 states. [2022-02-15 04:26:14,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20747 to 20745. [2022-02-15 04:26:14,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20745 states, 20741 states have (on average 1.4196036835253845) internal successors, (29444), 20741 states have internal predecessors, (29444), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:14,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20745 states to 20745 states and 29447 transitions. [2022-02-15 04:26:14,789 INFO L78 Accepts]: Start accepts. Automaton has 20745 states and 29447 transitions. Word has length 34 [2022-02-15 04:26:14,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:14,790 INFO L470 AbstractCegarLoop]: Abstraction has 20745 states and 29447 transitions. [2022-02-15 04:26:14,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:14,790 INFO L276 IsEmpty]: Start isEmpty. Operand 20745 states and 29447 transitions. [2022-02-15 04:26:14,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 04:26:14,803 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:14,804 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:26:14,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 04:26:14,804 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:14,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:14,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1250998544, now seen corresponding path program 1 times [2022-02-15 04:26:14,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:14,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338175222] [2022-02-15 04:26:14,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:14,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:14,805 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:14,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:14,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:14,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:26:14,823 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:14,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338175222] [2022-02-15 04:26:14,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1338175222] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:14,823 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:14,823 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:14,823 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163286744] [2022-02-15 04:26:14,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:14,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:14,823 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:14,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:14,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:14,824 INFO L87 Difference]: Start difference. First operand 20745 states and 29447 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:19,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:19,124 INFO L93 Difference]: Finished difference Result 60685 states and 85257 transitions. [2022-02-15 04:26:19,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:19,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-15 04:26:19,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:19,192 INFO L225 Difference]: With dead ends: 60685 [2022-02-15 04:26:19,192 INFO L226 Difference]: Without dead ends: 40459 [2022-02-15 04:26:19,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:26:19,231 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 191 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:26:19,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 111 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:19,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40459 states. [2022-02-15 04:26:23,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40459 to 40457. [2022-02-15 04:26:23,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40457 states, 40453 states have (on average 1.3796751786023287) internal successors, (55812), 40453 states have internal predecessors, (55812), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:23,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40457 states to 40457 states and 55815 transitions. [2022-02-15 04:26:23,140 INFO L78 Accepts]: Start accepts. Automaton has 40457 states and 55815 transitions. Word has length 34 [2022-02-15 04:26:23,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:23,141 INFO L470 AbstractCegarLoop]: Abstraction has 40457 states and 55815 transitions. [2022-02-15 04:26:23,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:23,141 INFO L276 IsEmpty]: Start isEmpty. Operand 40457 states and 55815 transitions. [2022-02-15 04:26:23,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 04:26:23,165 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:23,165 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:26:23,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 04:26:23,165 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:23,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:23,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1455620850, now seen corresponding path program 1 times [2022-02-15 04:26:23,166 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:23,166 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621684682] [2022-02-15 04:26:23,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:23,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:23,167 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:23,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:26:23,182 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:23,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621684682] [2022-02-15 04:26:23,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [621684682] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:23,182 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:23,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:23,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799050595] [2022-02-15 04:26:23,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:23,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:23,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:23,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:23,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:23,183 INFO L87 Difference]: Start difference. First operand 40457 states and 55815 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:27,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:27,474 INFO L93 Difference]: Finished difference Result 45581 states and 65033 transitions. [2022-02-15 04:26:27,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:27,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-15 04:26:27,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:27,559 INFO L225 Difference]: With dead ends: 45581 [2022-02-15 04:26:27,560 INFO L226 Difference]: Without dead ends: 45579 [2022-02-15 04:26:27,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:26:27,578 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 118 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:26:27,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 144 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:27,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45579 states. [2022-02-15 04:26:31,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45579 to 40457. [2022-02-15 04:26:31,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40457 states, 40453 states have (on average 1.3670185153140681) internal successors, (55300), 40453 states have internal predecessors, (55300), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:31,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40457 states to 40457 states and 55303 transitions. [2022-02-15 04:26:31,646 INFO L78 Accepts]: Start accepts. Automaton has 40457 states and 55303 transitions. Word has length 34 [2022-02-15 04:26:31,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:31,647 INFO L470 AbstractCegarLoop]: Abstraction has 40457 states and 55303 transitions. [2022-02-15 04:26:31,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:31,647 INFO L276 IsEmpty]: Start isEmpty. Operand 40457 states and 55303 transitions. [2022-02-15 04:26:31,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-15 04:26:31,670 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:31,670 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:26:31,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 04:26:31,670 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:31,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:31,671 INFO L85 PathProgramCache]: Analyzing trace with hash 126464356, now seen corresponding path program 1 times [2022-02-15 04:26:31,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:31,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047555037] [2022-02-15 04:26:31,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:31,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:31,682 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:31,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:31,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:31,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:31,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:26:31,726 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:31,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047555037] [2022-02-15 04:26:31,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1047555037] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:31,726 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:31,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:31,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268945581] [2022-02-15 04:26:31,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:31,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:31,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:31,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:31,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:31,727 INFO L87 Difference]: Start difference. First operand 40457 states and 55303 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:39,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:39,469 INFO L93 Difference]: Finished difference Result 69133 states and 96265 transitions. [2022-02-15 04:26:39,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:39,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-02-15 04:26:39,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:39,618 INFO L225 Difference]: With dead ends: 69133 [2022-02-15 04:26:39,618 INFO L226 Difference]: Without dead ends: 69131 [2022-02-15 04:26:39,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:26:39,647 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 166 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:26:39,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 92 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:39,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69131 states. [2022-02-15 04:26:45,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69131 to 60937. [2022-02-15 04:26:45,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60937 states, 60933 states have (on average 1.3276877882264126) internal successors, (80900), 60933 states have internal predecessors, (80900), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:45,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60937 states to 60937 states and 80903 transitions. [2022-02-15 04:26:45,879 INFO L78 Accepts]: Start accepts. Automaton has 60937 states and 80903 transitions. Word has length 35 [2022-02-15 04:26:45,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:45,879 INFO L470 AbstractCegarLoop]: Abstraction has 60937 states and 80903 transitions. [2022-02-15 04:26:45,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:45,879 INFO L276 IsEmpty]: Start isEmpty. Operand 60937 states and 80903 transitions. [2022-02-15 04:26:45,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-15 04:26:45,927 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:45,927 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:26:45,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 04:26:45,927 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:45,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:45,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1461883546, now seen corresponding path program 1 times [2022-02-15 04:26:45,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:45,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145330615] [2022-02-15 04:26:45,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:45,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:45,929 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:45,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:45,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:45,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:26:45,946 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:45,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145330615] [2022-02-15 04:26:45,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1145330615] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:45,946 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:45,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:45,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306455571] [2022-02-15 04:26:45,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:45,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:45,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:45,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:45,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:45,947 INFO L87 Difference]: Start difference. First operand 60937 states and 80903 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:54,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:54,450 INFO L93 Difference]: Finished difference Result 139789 states and 186377 transitions. [2022-02-15 04:26:54,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:54,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-02-15 04:26:54,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:54,624 INFO L225 Difference]: With dead ends: 139789 [2022-02-15 04:26:54,624 INFO L226 Difference]: Without dead ends: 79371 [2022-02-15 04:26:54,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:26:54,882 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 [2022-02-15 04:26:54,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 147 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:54,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79371 states. [2022-02-15 04:27:02,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79371 to 79369. [2022-02-15 04:27:02,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79369 states, 79365 states have (on average 1.3160965160965161) internal successors, (104452), 79365 states have internal predecessors, (104452), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:27:03,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79369 states to 79369 states and 104455 transitions. [2022-02-15 04:27:03,091 INFO L78 Accepts]: Start accepts. Automaton has 79369 states and 104455 transitions. Word has length 35 [2022-02-15 04:27:03,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:27:03,092 INFO L470 AbstractCegarLoop]: Abstraction has 79369 states and 104455 transitions. [2022-02-15 04:27:03,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:27:03,092 INFO L276 IsEmpty]: Start isEmpty. Operand 79369 states and 104455 transitions. [2022-02-15 04:27:03,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 04:27:03,369 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:27:03,370 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:27:03,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 04:27:03,370 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:27:03,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:27:03,370 INFO L85 PathProgramCache]: Analyzing trace with hash -374356763, now seen corresponding path program 1 times [2022-02-15 04:27:03,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:27:03,371 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918276870] [2022-02-15 04:27:03,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:27:03,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:27:03,373 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:27:03,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:27:03,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:27:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:27:03,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:27:03,426 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:27:03,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918276870] [2022-02-15 04:27:03,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1918276870] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:27:03,426 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:27:03,426 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:27:03,427 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122006954] [2022-02-15 04:27:03,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:27:03,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:27:03,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:27:03,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:27:03,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:27:03,428 INFO L87 Difference]: Start difference. First operand 79369 states and 104455 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:27:13,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:27:13,295 INFO L93 Difference]: Finished difference Result 119821 states and 157705 transitions. [2022-02-15 04:27:13,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:27:13,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-15 04:27:13,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:27:13,451 INFO L225 Difference]: With dead ends: 119821 [2022-02-15 04:27:13,452 INFO L226 Difference]: Without dead ends: 80907 [2022-02-15 04:27:13,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:27:13,517 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 173 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:27:13,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 123 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:27:13,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80907 states. [2022-02-15 04:27:21,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80907 to 80905. [2022-02-15 04:27:22,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80905 states, 80901 states have (on average 1.3037663316893486) internal successors, (105476), 80901 states have internal predecessors, (105476), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:27:22,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80905 states to 80905 states and 105479 transitions. [2022-02-15 04:27:22,207 INFO L78 Accepts]: Start accepts. Automaton has 80905 states and 105479 transitions. Word has length 36 [2022-02-15 04:27:22,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:27:22,207 INFO L470 AbstractCegarLoop]: Abstraction has 80905 states and 105479 transitions. [2022-02-15 04:27:22,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:27:22,208 INFO L276 IsEmpty]: Start isEmpty. Operand 80905 states and 105479 transitions. [2022-02-15 04:27:22,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 04:27:22,427 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:27:22,427 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:27:22,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 04:27:22,428 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:27:22,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:27:22,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1926465827, now seen corresponding path program 1 times [2022-02-15 04:27:22,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:27:22,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199919550] [2022-02-15 04:27:22,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:27:22,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:27:22,430 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:27:22,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:27:22,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:27:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:27:22,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:27:22,488 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:27:22,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199919550] [2022-02-15 04:27:22,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1199919550] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:27:22,489 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:27:22,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:27:22,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879982772] [2022-02-15 04:27:22,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:27:22,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:27:22,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:27:22,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:27:22,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:27:22,490 INFO L87 Difference]: Start difference. First operand 80905 states and 105479 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:27:36,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:27:36,981 INFO L93 Difference]: Finished difference Result 135181 states and 178185 transitions. [2022-02-15 04:27:36,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:27:36,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-15 04:27:36,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:27:37,275 INFO L225 Difference]: With dead ends: 135181 [2022-02-15 04:27:37,275 INFO L226 Difference]: Without dead ends: 135179 [2022-02-15 04:27:37,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:27:37,326 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 159 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:27:37,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 91 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:27:37,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135179 states. [2022-02-15 04:27:51,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135179 to 122889. [2022-02-15 04:27:51,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122889 states, 122885 states have (on average 1.2666476787240102) internal successors, (155652), 122885 states have internal predecessors, (155652), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:27:52,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122889 states to 122889 states and 155655 transitions. [2022-02-15 04:27:52,282 INFO L78 Accepts]: Start accepts. Automaton has 122889 states and 155655 transitions. Word has length 36 [2022-02-15 04:27:52,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:27:52,283 INFO L470 AbstractCegarLoop]: Abstraction has 122889 states and 155655 transitions. [2022-02-15 04:27:52,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:27:52,283 INFO L276 IsEmpty]: Start isEmpty. Operand 122889 states and 155655 transitions. [2022-02-15 04:27:52,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 04:27:52,389 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:27:52,389 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:27:52,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 04:27:52,389 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:27:52,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:27:52,390 INFO L85 PathProgramCache]: Analyzing trace with hash 338117925, now seen corresponding path program 1 times [2022-02-15 04:27:52,390 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:27:52,390 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677374646] [2022-02-15 04:27:52,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:27:52,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:27:52,391 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:27:52,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:27:52,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:27:52,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:27:52,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:27:52,410 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:27:52,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677374646] [2022-02-15 04:27:52,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1677374646] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:27:52,411 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:27:52,411 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:27:52,411 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312493530] [2022-02-15 04:27:52,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:27:52,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:27:52,411 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:27:52,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:27:52,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:27:52,411 INFO L87 Difference]: Start difference. First operand 122889 states and 155655 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:28:11,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:28:11,032 INFO L93 Difference]: Finished difference Result 278541 states and 352265 transitions. [2022-02-15 04:28:11,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:28:11,033 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-15 04:28:11,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:28:11,411 INFO L225 Difference]: With dead ends: 278541 [2022-02-15 04:28:11,412 INFO L226 Difference]: Without dead ends: 157707 [2022-02-15 04:28:11,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:28:11,589 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:28:11,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 149 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:28:11,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157707 states.