/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_15-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 04:26:24,749 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 04:26:24,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 04:26:24,779 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 04:26:24,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 04:26:24,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 04:26:24,808 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 04:26:24,809 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 04:26:24,816 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 04:26:24,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 04:26:24,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 04:26:24,818 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 04:26:24,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 04:26:24,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 04:26:24,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 04:26:24,818 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 04:26:24,818 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 04:26:24,819 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 04:26:24,819 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 04:26:24,819 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 04:26:24,819 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 04:26:24,819 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 04:26:24,820 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 04:26:24,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 04:26:24,820 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 04:26:24,820 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 04:26:24,820 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 04:26:24,820 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-15 04:26:24,821 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 04:26:25,032 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 04:26:25,049 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 04:26:25,051 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 04:26:25,056 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 04:26:25,059 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 04:26:25,060 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_15-2.c [2022-02-15 04:26:25,125 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f0578a85/954f6c321b61408ba6bdb87fbd2453d0/FLAG0a82af18a [2022-02-15 04:26:25,496 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 04:26:25,497 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_15-2.c [2022-02-15 04:26:25,503 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f0578a85/954f6c321b61408ba6bdb87fbd2453d0/FLAG0a82af18a [2022-02-15 04:26:25,520 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f0578a85/954f6c321b61408ba6bdb87fbd2453d0 [2022-02-15 04:26:25,522 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 04:26:25,523 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 04:26:25,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 04:26:25,524 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 04:26:25,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 04:26:25,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 04:26:25" (1/1) ... [2022-02-15 04:26:25,532 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44c32b0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:26:25, skipping insertion in model container [2022-02-15 04:26:25,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 04:26:25" (1/1) ... [2022-02-15 04:26:25,538 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 04:26:25,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 04:26:25,708 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_15-2.c[5628,5641] [2022-02-15 04:26:25,727 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 04:26:25,741 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 04:26:25,761 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_15-2.c[5628,5641] [2022-02-15 04:26:25,763 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 04:26:25,773 INFO L208 MainTranslator]: Completed translation [2022-02-15 04:26:25,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:26:25 WrapperNode [2022-02-15 04:26:25,773 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 04:26:25,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 04:26:25,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 04:26:25,775 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 04:26:25,783 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:26:25" (1/1) ... [2022-02-15 04:26:25,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:26:25" (1/1) ... [2022-02-15 04:26:25,788 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:26:25" (1/1) ... [2022-02-15 04:26:25,789 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:26:25" (1/1) ... [2022-02-15 04:26:25,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:26:25" (1/1) ... [2022-02-15 04:26:25,808 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:26:25" (1/1) ... [2022-02-15 04:26:25,809 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:26:25" (1/1) ... [2022-02-15 04:26:25,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 04:26:25,818 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 04:26:25,818 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 04:26:25,818 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 04:26:25,819 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:26:25" (1/1) ... [2022-02-15 04:26:25,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 04:26:25,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 04:26:25,856 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 04:26:25,857 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 04:26:25,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 04:26:25,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 04:26:25,883 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 04:26:25,883 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 04:26:25,883 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 04:26:25,883 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 04:26:25,883 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 04:26:25,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 04:26:25,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-15 04:26:25,883 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 04:26:25,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 04:26:25,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 04:26:25,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 04:26:25,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 04:26:25,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 04:26:25,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 04:26:25,942 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 04:26:25,944 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 04:26:26,225 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 04:26:26,232 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 04:26:26,232 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-15 04:26:26,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 04:26:26 BoogieIcfgContainer [2022-02-15 04:26:26,234 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 04:26:26,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 04:26:26,235 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 04:26:26,249 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 04:26:26,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 04:26:25" (1/3) ... [2022-02-15 04:26:26,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62b3c17c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 04:26:26, skipping insertion in model container [2022-02-15 04:26:26,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:26:25" (2/3) ... [2022-02-15 04:26:26,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62b3c17c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 04:26:26, skipping insertion in model container [2022-02-15 04:26:26,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 04:26:26" (3/3) ... [2022-02-15 04:26:26,251 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_15-2.c [2022-02-15 04:26:26,255 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 04:26:26,256 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 04:26:26,297 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 04:26:26,304 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 04:26:26,304 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 04:26:26,320 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 55 states have internal predecessors, (103), 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 04:26:26,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 04:26:26,329 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:26,329 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 04:26:26,330 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:26,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:26,334 INFO L85 PathProgramCache]: Analyzing trace with hash 208658311, now seen corresponding path program 1 times [2022-02-15 04:26:26,339 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:26,339 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585718518] [2022-02-15 04:26:26,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:26,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:26,400 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:26,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:26,666 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 04:26:26,667 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:26,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585718518] [2022-02-15 04:26:26,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1585718518] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:26,669 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:26,669 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:26,670 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895908538] [2022-02-15 04:26:26,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:26,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:26,674 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:26,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:26,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:26,699 INFO L87 Difference]: Start difference. First operand has 60 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 55 states have internal predecessors, (103), 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 5.75) 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 04:26:26,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:26,962 INFO L93 Difference]: Finished difference Result 118 states and 211 transitions. [2022-02-15 04:26:26,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:26,964 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 04:26:26,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:26,975 INFO L225 Difference]: With dead ends: 118 [2022-02-15 04:26:26,975 INFO L226 Difference]: Without dead ends: 103 [2022-02-15 04:26:26,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:26:26,982 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 259 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 04:26:26,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 119 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 04:26:26,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-02-15 04:26:27,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 71. [2022-02-15 04:26:27,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.8955223880597014) internal successors, (127), 67 states have internal predecessors, (127), 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 04:26:27,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 130 transitions. [2022-02-15 04:26:27,038 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 130 transitions. Word has length 26 [2022-02-15 04:26:27,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:27,039 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 130 transitions. [2022-02-15 04:26:27,039 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 04:26:27,039 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 130 transitions. [2022-02-15 04:26:27,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 04:26:27,040 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:27,040 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] [2022-02-15 04:26:27,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 04:26:27,041 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:27,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:27,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1785486395, now seen corresponding path program 1 times [2022-02-15 04:26:27,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:27,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153954272] [2022-02-15 04:26:27,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:27,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:27,045 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:27,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:27,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:27,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:27,115 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 04:26:27,115 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:27,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153954272] [2022-02-15 04:26:27,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [153954272] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:27,116 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:27,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:27,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626036794] [2022-02-15 04:26:27,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:27,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:27,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:27,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:27,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:27,118 INFO L87 Difference]: Start difference. First operand 71 states and 130 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 04:26:27,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:27,256 INFO L93 Difference]: Finished difference Result 168 states and 313 transitions. [2022-02-15 04:26:27,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:27,257 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 04:26:27,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:27,258 INFO L225 Difference]: With dead ends: 168 [2022-02-15 04:26:27,258 INFO L226 Difference]: Without dead ends: 103 [2022-02-15 04:26:27,259 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 04:26:27,260 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 223 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:26:27,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 135 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:27,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-02-15 04:26:27,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2022-02-15 04:26:27,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 97 states have (on average 1.8865979381443299) internal successors, (183), 97 states have internal predecessors, (183), 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 04:26:27,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 186 transitions. [2022-02-15 04:26:27,277 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 186 transitions. Word has length 26 [2022-02-15 04:26:27,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:27,277 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 186 transitions. [2022-02-15 04:26:27,277 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 04:26:27,277 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 186 transitions. [2022-02-15 04:26:27,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-15 04:26:27,278 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:27,278 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 04:26:27,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 04:26:27,279 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:27,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:27,279 INFO L85 PathProgramCache]: Analyzing trace with hash -2121315188, now seen corresponding path program 1 times [2022-02-15 04:26:27,279 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:27,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115093081] [2022-02-15 04:26:27,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:27,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:27,282 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:27,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:27,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:27,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:27,366 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 04:26:27,366 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:27,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115093081] [2022-02-15 04:26:27,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2115093081] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:27,367 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:27,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:27,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590313148] [2022-02-15 04:26:27,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:27,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:27,368 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:27,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:27,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:27,368 INFO L87 Difference]: Start difference. First operand 101 states and 186 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 04:26:27,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:27,500 INFO L93 Difference]: Finished difference Result 154 states and 280 transitions. [2022-02-15 04:26:27,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:27,501 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 04:26:27,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:27,504 INFO L225 Difference]: With dead ends: 154 [2022-02-15 04:26:27,504 INFO L226 Difference]: Without dead ends: 106 [2022-02-15 04:26:27,505 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 04:26:27,511 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 196 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:26:27,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 163 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:27,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-02-15 04:26:27,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2022-02-15 04:26:27,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 100 states have (on average 1.85) internal successors, (185), 100 states have internal predecessors, (185), 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 04:26:27,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 188 transitions. [2022-02-15 04:26:27,546 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 188 transitions. Word has length 27 [2022-02-15 04:26:27,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:27,546 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 188 transitions. [2022-02-15 04:26:27,546 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 04:26:27,546 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 188 transitions. [2022-02-15 04:26:27,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-15 04:26:27,547 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:27,547 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 04:26:27,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 04:26:27,547 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:27,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:27,548 INFO L85 PathProgramCache]: Analyzing trace with hash 484708366, now seen corresponding path program 1 times [2022-02-15 04:26:27,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:27,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646011817] [2022-02-15 04:26:27,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:27,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:27,550 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:27,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:27,627 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 04:26:27,627 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:27,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646011817] [2022-02-15 04:26:27,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1646011817] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:27,628 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:27,628 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:27,628 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148972385] [2022-02-15 04:26:27,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:27,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:27,630 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:27,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:27,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:27,630 INFO L87 Difference]: Start difference. First operand 104 states and 188 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 04:26:27,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:27,760 INFO L93 Difference]: Finished difference Result 292 states and 540 transitions. [2022-02-15 04:26:27,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:27,760 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 04:26:27,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:27,763 INFO L225 Difference]: With dead ends: 292 [2022-02-15 04:26:27,763 INFO L226 Difference]: Without dead ends: 197 [2022-02-15 04:26:27,763 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 04:26:27,771 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 248 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:26:27,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 109 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:27,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-02-15 04:26:27,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 195. [2022-02-15 04:26:27,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 191 states have (on average 1.8534031413612566) internal successors, (354), 191 states have internal predecessors, (354), 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 04:26:27,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 357 transitions. [2022-02-15 04:26:27,801 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 357 transitions. Word has length 27 [2022-02-15 04:26:27,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:27,802 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 357 transitions. [2022-02-15 04:26:27,802 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 04:26:27,802 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 357 transitions. [2022-02-15 04:26:27,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-15 04:26:27,808 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:27,808 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 04:26:27,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 04:26:27,808 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:27,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:27,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1816114224, now seen corresponding path program 1 times [2022-02-15 04:26:27,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:27,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807518185] [2022-02-15 04:26:27,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:27,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:27,813 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:27,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:27,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:27,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:27,885 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 04:26:27,886 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:27,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807518185] [2022-02-15 04:26:27,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [807518185] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:27,887 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:27,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:27,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144001493] [2022-02-15 04:26:27,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:27,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:27,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:27,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:27,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:27,888 INFO L87 Difference]: Start difference. First operand 195 states and 357 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 04:26:27,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:27,995 INFO L93 Difference]: Finished difference Result 255 states and 467 transitions. [2022-02-15 04:26:27,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:27,995 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 04:26:27,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:27,997 INFO L225 Difference]: With dead ends: 255 [2022-02-15 04:26:27,997 INFO L226 Difference]: Without dead ends: 253 [2022-02-15 04:26:27,998 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 04:26:27,999 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 161 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:26:27,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 188 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:27,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-02-15 04:26:28,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 195. [2022-02-15 04:26:28,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 191 states have (on average 1.8429319371727748) internal successors, (352), 191 states have internal predecessors, (352), 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 04:26:28,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 355 transitions. [2022-02-15 04:26:28,017 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 355 transitions. Word has length 27 [2022-02-15 04:26:28,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:28,019 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 355 transitions. [2022-02-15 04:26:28,020 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 04:26:28,020 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 355 transitions. [2022-02-15 04:26:28,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 04:26:28,025 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:28,029 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 04:26:28,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 04:26:28,030 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:28,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:28,030 INFO L85 PathProgramCache]: Analyzing trace with hash 2141269562, now seen corresponding path program 1 times [2022-02-15 04:26:28,030 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:28,031 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026852400] [2022-02-15 04:26:28,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:28,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:28,032 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:28,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:28,089 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 04:26:28,090 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:28,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026852400] [2022-02-15 04:26:28,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2026852400] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:28,090 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:28,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:28,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208641136] [2022-02-15 04:26:28,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:28,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:28,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:28,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:28,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:28,092 INFO L87 Difference]: Start difference. First operand 195 states and 355 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 04:26:28,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:28,224 INFO L93 Difference]: Finished difference Result 371 states and 683 transitions. [2022-02-15 04:26:28,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:28,225 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 04:26:28,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:28,227 INFO L225 Difference]: With dead ends: 371 [2022-02-15 04:26:28,228 INFO L226 Difference]: Without dead ends: 369 [2022-02-15 04:26:28,228 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 04:26:28,229 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 239 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:26:28,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 106 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:28,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-02-15 04:26:28,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 263. [2022-02-15 04:26:28,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 259 states have (on average 1.83011583011583) internal successors, (474), 259 states have internal predecessors, (474), 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 04:26:28,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 477 transitions. [2022-02-15 04:26:28,253 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 477 transitions. Word has length 28 [2022-02-15 04:26:28,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:28,253 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 477 transitions. [2022-02-15 04:26:28,253 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 04:26:28,254 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 477 transitions. [2022-02-15 04:26:28,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 04:26:28,255 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:28,255 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 04:26:28,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 04:26:28,256 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:28,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:28,256 INFO L85 PathProgramCache]: Analyzing trace with hash 147124856, now seen corresponding path program 1 times [2022-02-15 04:26:28,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:28,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739136274] [2022-02-15 04:26:28,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:28,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:28,258 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:28,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:28,319 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 04:26:28,319 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:28,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739136274] [2022-02-15 04:26:28,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [739136274] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:28,321 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:28,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:28,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647888406] [2022-02-15 04:26:28,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:28,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:28,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:28,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:28,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:28,322 INFO L87 Difference]: Start difference. First operand 263 states and 477 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 04:26:28,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:28,456 INFO L93 Difference]: Finished difference Result 631 states and 1155 transitions. [2022-02-15 04:26:28,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:28,457 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 04:26:28,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:28,459 INFO L225 Difference]: With dead ends: 631 [2022-02-15 04:26:28,459 INFO L226 Difference]: Without dead ends: 377 [2022-02-15 04:26:28,462 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 04:26:28,463 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 211 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:26:28,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 139 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:28,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-02-15 04:26:28,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 375. [2022-02-15 04:26:28,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 371 states have (on average 1.8221024258760108) internal successors, (676), 371 states have internal predecessors, (676), 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 04:26:28,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 679 transitions. [2022-02-15 04:26:28,496 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 679 transitions. Word has length 28 [2022-02-15 04:26:28,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:28,496 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 679 transitions. [2022-02-15 04:26:28,496 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 04:26:28,497 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 679 transitions. [2022-02-15 04:26:28,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 04:26:28,497 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:28,497 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 04:26:28,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 04:26:28,498 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:28,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:28,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1955059427, now seen corresponding path program 1 times [2022-02-15 04:26:28,499 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:28,499 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939147174] [2022-02-15 04:26:28,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:28,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:28,502 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:28,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:28,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:26:28,558 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:28,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939147174] [2022-02-15 04:26:28,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [939147174] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:28,559 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:28,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:28,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163414966] [2022-02-15 04:26:28,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:28,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:28,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:28,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:28,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:28,560 INFO L87 Difference]: Start difference. First operand 375 states and 679 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 04:26:28,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:28,690 INFO L93 Difference]: Finished difference Result 565 states and 1021 transitions. [2022-02-15 04:26:28,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:28,691 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 04:26:28,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:28,695 INFO L225 Difference]: With dead ends: 565 [2022-02-15 04:26:28,695 INFO L226 Difference]: Without dead ends: 383 [2022-02-15 04:26:28,697 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 04:26:28,697 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 194 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:26:28,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 157 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:28,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-02-15 04:26:28,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 381. [2022-02-15 04:26:28,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 377 states have (on average 1.8037135278514589) internal successors, (680), 377 states have internal predecessors, (680), 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 04:26:28,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 683 transitions. [2022-02-15 04:26:28,738 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 683 transitions. Word has length 29 [2022-02-15 04:26:28,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:28,740 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 683 transitions. [2022-02-15 04:26:28,740 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 04:26:28,740 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 683 transitions. [2022-02-15 04:26:28,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 04:26:28,741 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:28,741 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 04:26:28,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 04:26:28,741 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:28,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:28,742 INFO L85 PathProgramCache]: Analyzing trace with hash 266115685, now seen corresponding path program 1 times [2022-02-15 04:26:28,742 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:28,742 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326237409] [2022-02-15 04:26:28,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:28,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:28,744 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:28,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:28,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:28,801 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 04:26:28,801 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:28,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326237409] [2022-02-15 04:26:28,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [326237409] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:28,802 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:28,802 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:28,802 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344194735] [2022-02-15 04:26:28,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:28,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:28,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:28,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:28,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:28,803 INFO L87 Difference]: Start difference. First operand 381 states and 683 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 04:26:28,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:28,938 INFO L93 Difference]: Finished difference Result 717 states and 1301 transitions. [2022-02-15 04:26:28,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:28,939 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 04:26:28,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:28,942 INFO L225 Difference]: With dead ends: 717 [2022-02-15 04:26:28,942 INFO L226 Difference]: Without dead ends: 715 [2022-02-15 04:26:28,943 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 04:26:28,945 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 232 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:26:28,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 105 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:28,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-02-15 04:26:28,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 521. [2022-02-15 04:26:28,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 517 states have (on average 1.7794970986460348) internal successors, (920), 517 states have internal predecessors, (920), 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 04:26:28,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 923 transitions. [2022-02-15 04:26:28,986 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 923 transitions. Word has length 29 [2022-02-15 04:26:28,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:28,986 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 923 transitions. [2022-02-15 04:26:28,986 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 04:26:28,986 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 923 transitions. [2022-02-15 04:26:28,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 04:26:28,988 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:28,988 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 04:26:28,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 04:26:28,988 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:28,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:28,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1728029021, now seen corresponding path program 1 times [2022-02-15 04:26:28,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:28,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811988356] [2022-02-15 04:26:28,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:28,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:28,991 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:29,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:29,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:29,031 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 04:26:29,032 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:29,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811988356] [2022-02-15 04:26:29,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1811988356] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:29,032 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:29,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:29,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163518047] [2022-02-15 04:26:29,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:29,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:29,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:29,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:29,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:29,034 INFO L87 Difference]: Start difference. First operand 521 states and 923 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 04:26:29,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:29,177 INFO L93 Difference]: Finished difference Result 1245 states and 2221 transitions. [2022-02-15 04:26:29,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:29,178 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 04:26:29,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:29,182 INFO L225 Difference]: With dead ends: 1245 [2022-02-15 04:26:29,182 INFO L226 Difference]: Without dead ends: 739 [2022-02-15 04:26:29,183 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 04:26:29,183 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 205 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:26:29,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 141 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:29,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-02-15 04:26:29,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 737. [2022-02-15 04:26:29,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 733 states have (on average 1.7735334242837653) internal successors, (1300), 733 states have internal predecessors, (1300), 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 04:26:29,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1303 transitions. [2022-02-15 04:26:29,251 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1303 transitions. Word has length 29 [2022-02-15 04:26:29,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:29,251 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 1303 transitions. [2022-02-15 04:26:29,251 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 04:26:29,252 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1303 transitions. [2022-02-15 04:26:29,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 04:26:29,253 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:29,253 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 04:26:29,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 04:26:29,253 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:29,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:29,254 INFO L85 PathProgramCache]: Analyzing trace with hash -340135571, now seen corresponding path program 1 times [2022-02-15 04:26:29,254 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:29,254 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059891121] [2022-02-15 04:26:29,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:29,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:29,256 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:29,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:29,295 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 04:26:29,295 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:29,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059891121] [2022-02-15 04:26:29,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1059891121] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:29,295 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:29,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:29,295 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174713225] [2022-02-15 04:26:29,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:29,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:29,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:29,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:29,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:29,297 INFO L87 Difference]: Start difference. First operand 737 states and 1303 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 04:26:29,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:29,439 INFO L93 Difference]: Finished difference Result 1105 states and 1949 transitions. [2022-02-15 04:26:29,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:29,439 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 04:26:29,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:29,443 INFO L225 Difference]: With dead ends: 1105 [2022-02-15 04:26:29,443 INFO L226 Difference]: Without dead ends: 747 [2022-02-15 04:26:29,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:26:29,444 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 193 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:26:29,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 154 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:29,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-02-15 04:26:29,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 745. [2022-02-15 04:26:29,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 741 states have (on average 1.7543859649122806) internal successors, (1300), 741 states have internal predecessors, (1300), 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 04:26:29,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1303 transitions. [2022-02-15 04:26:29,504 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1303 transitions. Word has length 30 [2022-02-15 04:26:29,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:29,504 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 1303 transitions. [2022-02-15 04:26:29,504 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 04:26:29,504 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1303 transitions. [2022-02-15 04:26:29,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 04:26:29,505 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:29,505 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 04:26:29,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 04:26:29,506 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:29,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:29,506 INFO L85 PathProgramCache]: Analyzing trace with hash -2029079313, now seen corresponding path program 1 times [2022-02-15 04:26:29,506 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:29,506 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352181576] [2022-02-15 04:26:29,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:29,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:29,512 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:29,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:29,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:29,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:29,543 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 04:26:29,544 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:29,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352181576] [2022-02-15 04:26:29,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1352181576] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:29,544 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:29,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:29,544 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671472679] [2022-02-15 04:26:29,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:29,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:29,544 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:29,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:29,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:29,545 INFO L87 Difference]: Start difference. First operand 745 states and 1303 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 04:26:29,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:29,753 INFO L93 Difference]: Finished difference Result 1389 states and 2465 transitions. [2022-02-15 04:26:29,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:29,753 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 04:26:29,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:29,759 INFO L225 Difference]: With dead ends: 1389 [2022-02-15 04:26:29,759 INFO L226 Difference]: Without dead ends: 1387 [2022-02-15 04:26:29,760 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 04:26:29,760 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 225 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:26:29,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 104 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:29,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2022-02-15 04:26:29,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1033. [2022-02-15 04:26:29,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1029 states have (on average 1.7220602526724975) internal successors, (1772), 1029 states have internal predecessors, (1772), 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 04:26:29,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1775 transitions. [2022-02-15 04:26:29,848 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1775 transitions. Word has length 30 [2022-02-15 04:26:29,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:29,848 INFO L470 AbstractCegarLoop]: Abstraction has 1033 states and 1775 transitions. [2022-02-15 04:26:29,848 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 04:26:29,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1775 transitions. [2022-02-15 04:26:29,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 04:26:29,850 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:29,850 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 04:26:29,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 04:26:29,850 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:29,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:29,850 INFO L85 PathProgramCache]: Analyzing trace with hash 271743277, now seen corresponding path program 1 times [2022-02-15 04:26:29,851 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:29,851 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479348041] [2022-02-15 04:26:29,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:29,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:29,852 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:29,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:29,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:29,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:26:29,882 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:29,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479348041] [2022-02-15 04:26:29,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1479348041] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:29,882 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:29,882 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:29,882 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302165875] [2022-02-15 04:26:29,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:29,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:29,882 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:29,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:29,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:29,883 INFO L87 Difference]: Start difference. First operand 1033 states and 1775 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 04:26:30,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:30,105 INFO L93 Difference]: Finished difference Result 2461 states and 4257 transitions. [2022-02-15 04:26:30,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:30,105 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 04:26:30,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:30,111 INFO L225 Difference]: With dead ends: 2461 [2022-02-15 04:26:30,111 INFO L226 Difference]: Without dead ends: 1451 [2022-02-15 04:26:30,113 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 04:26:30,114 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 199 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:26:30,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 143 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:30,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2022-02-15 04:26:30,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1449. [2022-02-15 04:26:30,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1445 states have (on average 1.719031141868512) internal successors, (2484), 1445 states have internal predecessors, (2484), 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 04:26:30,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 2487 transitions. [2022-02-15 04:26:30,240 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 2487 transitions. Word has length 30 [2022-02-15 04:26:30,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:30,241 INFO L470 AbstractCegarLoop]: Abstraction has 1449 states and 2487 transitions. [2022-02-15 04:26:30,241 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 04:26:30,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 2487 transitions. [2022-02-15 04:26:30,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 04:26:30,242 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:30,242 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 04:26:30,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 04:26:30,243 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:30,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:30,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1523263864, now seen corresponding path program 1 times [2022-02-15 04:26:30,243 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:30,243 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906651706] [2022-02-15 04:26:30,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:30,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:30,245 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:30,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:30,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:30,275 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 04:26:30,275 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:30,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906651706] [2022-02-15 04:26:30,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [906651706] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:30,275 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:30,275 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:30,275 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878485095] [2022-02-15 04:26:30,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:30,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:30,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:30,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:30,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:30,277 INFO L87 Difference]: Start difference. First operand 1449 states and 2487 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 04:26:30,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:30,500 INFO L93 Difference]: Finished difference Result 2173 states and 3721 transitions. [2022-02-15 04:26:30,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:30,500 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 04:26:30,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:30,505 INFO L225 Difference]: With dead ends: 2173 [2022-02-15 04:26:30,505 INFO L226 Difference]: Without dead ends: 1467 [2022-02-15 04:26:30,506 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 04:26:30,507 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 192 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:26:30,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 151 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:30,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2022-02-15 04:26:30,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1465. [2022-02-15 04:26:30,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1461 states have (on average 1.700205338809035) internal successors, (2484), 1461 states have internal predecessors, (2484), 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 04:26:30,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 2487 transitions. [2022-02-15 04:26:30,639 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 2487 transitions. Word has length 31 [2022-02-15 04:26:30,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:30,639 INFO L470 AbstractCegarLoop]: Abstraction has 1465 states and 2487 transitions. [2022-02-15 04:26:30,639 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 04:26:30,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 2487 transitions. [2022-02-15 04:26:30,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 04:26:30,641 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:30,641 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 04:26:30,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 04:26:30,641 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:30,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:30,641 INFO L85 PathProgramCache]: Analyzing trace with hash -165679878, now seen corresponding path program 1 times [2022-02-15 04:26:30,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:30,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148482686] [2022-02-15 04:26:30,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:30,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:30,643 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:30,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:30,685 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 04:26:30,686 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:30,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148482686] [2022-02-15 04:26:30,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [148482686] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:30,686 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:30,686 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:30,686 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133649188] [2022-02-15 04:26:30,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:30,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:30,687 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:30,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:30,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:30,687 INFO L87 Difference]: Start difference. First operand 1465 states and 2487 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 04:26:30,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:30,996 INFO L93 Difference]: Finished difference Result 2701 states and 4665 transitions. [2022-02-15 04:26:30,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:30,997 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 04:26:30,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:31,007 INFO L225 Difference]: With dead ends: 2701 [2022-02-15 04:26:31,007 INFO L226 Difference]: Without dead ends: 2699 [2022-02-15 04:26:31,008 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 04:26:31,008 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 218 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:26:31,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 103 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:31,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2022-02-15 04:26:31,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 2057. [2022-02-15 04:26:31,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2057 states, 2053 states have (on average 1.6619581100828056) internal successors, (3412), 2053 states have internal predecessors, (3412), 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 04:26:31,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 3415 transitions. [2022-02-15 04:26:31,226 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 3415 transitions. Word has length 31 [2022-02-15 04:26:31,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:31,226 INFO L470 AbstractCegarLoop]: Abstraction has 2057 states and 3415 transitions. [2022-02-15 04:26:31,227 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 04:26:31,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 3415 transitions. [2022-02-15 04:26:31,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 04:26:31,229 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:31,229 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 04:26:31,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 04:26:31,230 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:31,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:31,231 INFO L85 PathProgramCache]: Analyzing trace with hash 2135142712, now seen corresponding path program 1 times [2022-02-15 04:26:31,231 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:31,231 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161330554] [2022-02-15 04:26:31,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:31,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:31,233 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:31,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:31,274 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 04:26:31,275 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:31,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161330554] [2022-02-15 04:26:31,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [161330554] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:31,275 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:31,275 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:31,275 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377597083] [2022-02-15 04:26:31,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:31,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:31,275 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:31,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:31,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:31,276 INFO L87 Difference]: Start difference. First operand 2057 states and 3415 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 04:26:31,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:31,628 INFO L93 Difference]: Finished difference Result 4877 states and 8153 transitions. [2022-02-15 04:26:31,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:31,628 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 04:26:31,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:31,638 INFO L225 Difference]: With dead ends: 4877 [2022-02-15 04:26:31,638 INFO L226 Difference]: Without dead ends: 2859 [2022-02-15 04:26:31,642 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 04:26:31,643 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 193 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:26:31,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 145 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:31,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2022-02-15 04:26:31,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 2857. [2022-02-15 04:26:31,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2857 states, 2853 states have (on average 1.6614090431125133) internal successors, (4740), 2853 states have internal predecessors, (4740), 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 04:26:31,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2857 states to 2857 states and 4743 transitions. [2022-02-15 04:26:31,892 INFO L78 Accepts]: Start accepts. Automaton has 2857 states and 4743 transitions. Word has length 31 [2022-02-15 04:26:31,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:31,892 INFO L470 AbstractCegarLoop]: Abstraction has 2857 states and 4743 transitions. [2022-02-15 04:26:31,892 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 04:26:31,892 INFO L276 IsEmpty]: Start isEmpty. Operand 2857 states and 4743 transitions. [2022-02-15 04:26:31,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 04:26:31,899 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:31,899 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 04:26:31,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 04:26:31,899 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:31,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:31,900 INFO L85 PathProgramCache]: Analyzing trace with hash -840895454, now seen corresponding path program 1 times [2022-02-15 04:26:31,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:31,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988399329] [2022-02-15 04:26:31,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:31,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:31,903 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:31,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:31,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:31,931 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 04:26:31,931 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:31,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988399329] [2022-02-15 04:26:31,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [988399329] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:31,931 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:31,932 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:31,932 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59284481] [2022-02-15 04:26:31,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:31,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:31,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:31,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:31,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:31,933 INFO L87 Difference]: Start difference. First operand 2857 states and 4743 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 04:26:32,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:32,269 INFO L93 Difference]: Finished difference Result 4285 states and 7097 transitions. [2022-02-15 04:26:32,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:32,269 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 04:26:32,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:32,277 INFO L225 Difference]: With dead ends: 4285 [2022-02-15 04:26:32,277 INFO L226 Difference]: Without dead ends: 2891 [2022-02-15 04:26:32,280 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 04:26:32,281 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 191 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 148 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 04:26:32,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 148 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:32,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2891 states. [2022-02-15 04:26:32,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2891 to 2889. [2022-02-15 04:26:32,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2889 states, 2885 states have (on average 1.6429809358752165) internal successors, (4740), 2885 states have internal predecessors, (4740), 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 04:26:32,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2889 states to 2889 states and 4743 transitions. [2022-02-15 04:26:32,592 INFO L78 Accepts]: Start accepts. Automaton has 2889 states and 4743 transitions. Word has length 32 [2022-02-15 04:26:32,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:32,592 INFO L470 AbstractCegarLoop]: Abstraction has 2889 states and 4743 transitions. [2022-02-15 04:26:32,593 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 04:26:32,593 INFO L276 IsEmpty]: Start isEmpty. Operand 2889 states and 4743 transitions. [2022-02-15 04:26:32,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 04:26:32,596 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:32,596 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 04:26:32,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 04:26:32,596 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:32,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:32,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1765128100, now seen corresponding path program 1 times [2022-02-15 04:26:32,597 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:32,597 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513281830] [2022-02-15 04:26:32,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:32,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:32,598 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:32,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:32,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:32,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:32,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:26:32,622 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:32,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513281830] [2022-02-15 04:26:32,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [513281830] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:32,622 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:32,622 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:32,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768438051] [2022-02-15 04:26:32,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:32,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:32,623 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:32,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:32,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:32,623 INFO L87 Difference]: Start difference. First operand 2889 states and 4743 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 04:26:33,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:33,170 INFO L93 Difference]: Finished difference Result 5261 states and 8809 transitions. [2022-02-15 04:26:33,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:33,171 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 04:26:33,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:33,187 INFO L225 Difference]: With dead ends: 5261 [2022-02-15 04:26:33,187 INFO L226 Difference]: Without dead ends: 5259 [2022-02-15 04:26:33,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:26:33,189 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 211 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:26:33,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 102 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:33,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5259 states. [2022-02-15 04:26:33,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5259 to 4105. [2022-02-15 04:26:33,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4105 states, 4101 states have (on average 1.6005852231163131) internal successors, (6564), 4101 states have internal predecessors, (6564), 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 04:26:33,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4105 states to 4105 states and 6567 transitions. [2022-02-15 04:26:33,608 INFO L78 Accepts]: Start accepts. Automaton has 4105 states and 6567 transitions. Word has length 32 [2022-02-15 04:26:33,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:33,608 INFO L470 AbstractCegarLoop]: Abstraction has 4105 states and 6567 transitions. [2022-02-15 04:26:33,608 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 04:26:33,608 INFO L276 IsEmpty]: Start isEmpty. Operand 4105 states and 6567 transitions. [2022-02-15 04:26:33,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 04:26:33,613 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:33,613 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 04:26:33,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 04:26:33,614 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:33,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:33,614 INFO L85 PathProgramCache]: Analyzing trace with hash -229016606, now seen corresponding path program 1 times [2022-02-15 04:26:33,614 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:33,614 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583776410] [2022-02-15 04:26:33,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:33,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:33,616 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:33,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:33,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:33,640 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 04:26:33,640 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:33,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583776410] [2022-02-15 04:26:33,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [583776410] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:33,641 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:33,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:33,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496964188] [2022-02-15 04:26:33,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:33,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:33,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:33,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:33,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:33,642 INFO L87 Difference]: Start difference. First operand 4105 states and 6567 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 04:26:34,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:34,222 INFO L93 Difference]: Finished difference Result 9677 states and 15593 transitions. [2022-02-15 04:26:34,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:34,223 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 04:26:34,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:34,240 INFO L225 Difference]: With dead ends: 9677 [2022-02-15 04:26:34,240 INFO L226 Difference]: Without dead ends: 5643 [2022-02-15 04:26:34,249 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 04:26:34,250 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 187 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 147 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 04:26:34,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 147 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:34,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5643 states. [2022-02-15 04:26:34,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5643 to 5641. [2022-02-15 04:26:34,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5641 states, 5637 states have (on average 1.6015611140677666) internal successors, (9028), 5637 states have internal predecessors, (9028), 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 04:26:34,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5641 states to 5641 states and 9031 transitions. [2022-02-15 04:26:34,783 INFO L78 Accepts]: Start accepts. Automaton has 5641 states and 9031 transitions. Word has length 32 [2022-02-15 04:26:34,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:34,783 INFO L470 AbstractCegarLoop]: Abstraction has 5641 states and 9031 transitions. [2022-02-15 04:26:34,783 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 04:26:34,784 INFO L276 IsEmpty]: Start isEmpty. Operand 5641 states and 9031 transitions. [2022-02-15 04:26:34,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 04:26:34,789 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:34,789 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 04:26:34,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 04:26:34,790 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:34,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:34,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1115389939, now seen corresponding path program 1 times [2022-02-15 04:26:34,790 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:34,790 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393375278] [2022-02-15 04:26:34,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:34,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:34,792 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:34,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:34,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:26:34,839 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:34,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393375278] [2022-02-15 04:26:34,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1393375278] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:34,839 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:34,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:34,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041100981] [2022-02-15 04:26:34,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:34,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:34,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:34,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:34,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:34,840 INFO L87 Difference]: Start difference. First operand 5641 states and 9031 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 04:26:35,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:35,494 INFO L93 Difference]: Finished difference Result 8461 states and 13513 transitions. [2022-02-15 04:26:35,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:35,495 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 04:26:35,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:35,508 INFO L225 Difference]: With dead ends: 8461 [2022-02-15 04:26:35,508 INFO L226 Difference]: Without dead ends: 5707 [2022-02-15 04:26:35,516 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 04:26:35,516 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 190 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 145 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 04:26:35,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 145 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:35,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5707 states. [2022-02-15 04:26:35,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5707 to 5705. [2022-02-15 04:26:35,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5705 states, 5701 states have (on average 1.5835818277495177) internal successors, (9028), 5701 states have internal predecessors, (9028), 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 04:26:35,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5705 states to 5705 states and 9031 transitions. [2022-02-15 04:26:35,946 INFO L78 Accepts]: Start accepts. Automaton has 5705 states and 9031 transitions. Word has length 33 [2022-02-15 04:26:35,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:35,946 INFO L470 AbstractCegarLoop]: Abstraction has 5705 states and 9031 transitions. [2022-02-15 04:26:35,946 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 04:26:35,947 INFO L276 IsEmpty]: Start isEmpty. Operand 5705 states and 9031 transitions. [2022-02-15 04:26:35,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 04:26:35,952 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:35,952 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 04:26:35,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 04:26:35,953 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:35,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:35,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1490633615, now seen corresponding path program 1 times [2022-02-15 04:26:35,953 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:35,953 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633143264] [2022-02-15 04:26:35,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:35,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:35,955 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:35,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:35,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:35,976 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 04:26:35,976 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:35,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633143264] [2022-02-15 04:26:35,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [633143264] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:35,976 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:35,976 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:35,976 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149013931] [2022-02-15 04:26:35,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:35,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:35,977 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:35,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:35,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:35,977 INFO L87 Difference]: Start difference. First operand 5705 states and 9031 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 04:26:36,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:36,899 INFO L93 Difference]: Finished difference Result 10253 states and 16585 transitions. [2022-02-15 04:26:36,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:36,900 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 04:26:36,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:36,923 INFO L225 Difference]: With dead ends: 10253 [2022-02-15 04:26:36,923 INFO L226 Difference]: Without dead ends: 10251 [2022-02-15 04:26:36,927 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 04:26:36,928 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 204 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:26:36,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 101 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:36,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10251 states. [2022-02-15 04:26:37,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10251 to 8201. [2022-02-15 04:26:37,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8201 states, 8197 states have (on average 1.5386116872026352) internal successors, (12612), 8197 states have internal predecessors, (12612), 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 04:26:37,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8201 states to 8201 states and 12615 transitions. [2022-02-15 04:26:37,656 INFO L78 Accepts]: Start accepts. Automaton has 8201 states and 12615 transitions. Word has length 33 [2022-02-15 04:26:37,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:37,656 INFO L470 AbstractCegarLoop]: Abstraction has 8201 states and 12615 transitions. [2022-02-15 04:26:37,656 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 04:26:37,656 INFO L276 IsEmpty]: Start isEmpty. Operand 8201 states and 12615 transitions. [2022-02-15 04:26:37,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 04:26:37,667 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:37,667 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 04:26:37,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 04:26:37,667 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:37,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:37,667 INFO L85 PathProgramCache]: Analyzing trace with hash -503511091, now seen corresponding path program 1 times [2022-02-15 04:26:37,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:37,667 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668936784] [2022-02-15 04:26:37,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:37,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:37,669 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:37,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:37,690 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 04:26:37,690 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:37,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668936784] [2022-02-15 04:26:37,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [668936784] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:37,690 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:37,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:37,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510092069] [2022-02-15 04:26:37,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:37,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:37,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:37,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:37,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:37,691 INFO L87 Difference]: Start difference. First operand 8201 states and 12615 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 04:26:38,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:38,612 INFO L93 Difference]: Finished difference Result 19213 states and 29769 transitions. [2022-02-15 04:26:38,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:38,614 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 04:26:38,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:38,635 INFO L225 Difference]: With dead ends: 19213 [2022-02-15 04:26:38,635 INFO L226 Difference]: Without dead ends: 11147 [2022-02-15 04:26:38,655 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 04:26:38,656 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 181 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:26:38,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 149 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:38,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11147 states. [2022-02-15 04:26:39,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11147 to 11145. [2022-02-15 04:26:39,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11145 states, 11141 states have (on average 1.5398976752535678) internal successors, (17156), 11141 states have internal predecessors, (17156), 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 04:26:39,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11145 states to 11145 states and 17159 transitions. [2022-02-15 04:26:39,632 INFO L78 Accepts]: Start accepts. Automaton has 11145 states and 17159 transitions. Word has length 33 [2022-02-15 04:26:39,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:39,632 INFO L470 AbstractCegarLoop]: Abstraction has 11145 states and 17159 transitions. [2022-02-15 04:26:39,632 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 04:26:39,632 INFO L276 IsEmpty]: Start isEmpty. Operand 11145 states and 17159 transitions. [2022-02-15 04:26:39,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 04:26:39,642 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:39,642 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 04:26:39,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 04:26:39,642 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:39,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:39,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1034784041, now seen corresponding path program 1 times [2022-02-15 04:26:39,643 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:39,643 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639795907] [2022-02-15 04:26:39,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:39,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:39,644 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:39,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:26:39,667 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:39,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639795907] [2022-02-15 04:26:39,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1639795907] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:39,667 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:39,668 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:39,668 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255356218] [2022-02-15 04:26:39,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:39,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:39,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:39,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:39,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:39,669 INFO L87 Difference]: Start difference. First operand 11145 states and 17159 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 04:26:40,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:40,838 INFO L93 Difference]: Finished difference Result 16717 states and 25673 transitions. [2022-02-15 04:26:40,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:40,839 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 04:26:40,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:40,853 INFO L225 Difference]: With dead ends: 16717 [2022-02-15 04:26:40,854 INFO L226 Difference]: Without dead ends: 11275 [2022-02-15 04:26:40,871 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 04:26:40,872 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 189 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 142 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 04:26:40,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 142 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:40,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11275 states. [2022-02-15 04:26:41,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11275 to 11273. [2022-02-15 04:26:41,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11273 states, 11269 states have (on average 1.5224066021829799) internal successors, (17156), 11269 states have internal predecessors, (17156), 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 04:26:41,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11273 states to 11273 states and 17159 transitions. [2022-02-15 04:26:41,985 INFO L78 Accepts]: Start accepts. Automaton has 11273 states and 17159 transitions. Word has length 34 [2022-02-15 04:26:41,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:41,986 INFO L470 AbstractCegarLoop]: Abstraction has 11273 states and 17159 transitions. [2022-02-15 04:26:41,986 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 04:26:41,986 INFO L276 IsEmpty]: Start isEmpty. Operand 11273 states and 17159 transitions. [2022-02-15 04:26:41,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 04:26:41,995 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:41,995 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 04:26:41,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 04:26:41,995 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:41,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:41,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1571239513, now seen corresponding path program 1 times [2022-02-15 04:26:41,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:41,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483900177] [2022-02-15 04:26:41,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:41,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:41,997 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:42,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:42,021 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 04:26:42,021 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:42,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483900177] [2022-02-15 04:26:42,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1483900177] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:42,021 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:42,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:42,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433688857] [2022-02-15 04:26:42,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:42,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:42,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:42,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:42,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:42,024 INFO L87 Difference]: Start difference. First operand 11273 states and 17159 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 04:26:43,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:43,700 INFO L93 Difference]: Finished difference Result 19981 states and 31113 transitions. [2022-02-15 04:26:43,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:43,700 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 04:26:43,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:43,732 INFO L225 Difference]: With dead ends: 19981 [2022-02-15 04:26:43,732 INFO L226 Difference]: Without dead ends: 19979 [2022-02-15 04:26:43,738 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 04:26:43,739 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 197 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 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 04:26:43,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 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 04:26:43,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19979 states. [2022-02-15 04:26:45,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19979 to 16393. [2022-02-15 04:26:45,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16393 states, 16389 states have (on average 1.4763560925010677) internal successors, (24196), 16389 states have internal predecessors, (24196), 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 04:26:45,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16393 states to 16393 states and 24199 transitions. [2022-02-15 04:26:45,164 INFO L78 Accepts]: Start accepts. Automaton has 16393 states and 24199 transitions. Word has length 34 [2022-02-15 04:26:45,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:45,165 INFO L470 AbstractCegarLoop]: Abstraction has 16393 states and 24199 transitions. [2022-02-15 04:26:45,165 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 04:26:45,165 INFO L276 IsEmpty]: Start isEmpty. Operand 16393 states and 24199 transitions. [2022-02-15 04:26:45,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 04:26:45,183 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:45,183 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 04:26:45,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 04:26:45,183 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:45,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:45,184 INFO L85 PathProgramCache]: Analyzing trace with hash -422905193, now seen corresponding path program 1 times [2022-02-15 04:26:45,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:45,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032782449] [2022-02-15 04:26:45,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:45,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:45,185 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:45,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:45,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:45,206 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 04:26:45,206 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:45,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032782449] [2022-02-15 04:26:45,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2032782449] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:45,206 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:45,206 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:45,206 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944814658] [2022-02-15 04:26:45,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:45,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:45,207 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:45,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:45,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:45,207 INFO L87 Difference]: Start difference. First operand 16393 states and 24199 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 04:26:47,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:47,303 INFO L93 Difference]: Finished difference Result 38157 states and 56713 transitions. [2022-02-15 04:26:47,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:47,304 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 04:26:47,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:47,348 INFO L225 Difference]: With dead ends: 38157 [2022-02-15 04:26:47,348 INFO L226 Difference]: Without dead ends: 22027 [2022-02-15 04:26:47,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:26:47,382 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 175 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 04:26:47,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 151 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 04:26:47,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22027 states. [2022-02-15 04:26:49,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22027 to 22025. [2022-02-15 04:26:49,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22025 states, 22021 states have (on average 1.4765905272240134) internal successors, (32516), 22021 states have internal predecessors, (32516), 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 04:26:49,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22025 states to 22025 states and 32519 transitions. [2022-02-15 04:26:49,342 INFO L78 Accepts]: Start accepts. Automaton has 22025 states and 32519 transitions. Word has length 34 [2022-02-15 04:26:49,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:49,342 INFO L470 AbstractCegarLoop]: Abstraction has 22025 states and 32519 transitions. [2022-02-15 04:26:49,342 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 04:26:49,342 INFO L276 IsEmpty]: Start isEmpty. Operand 22025 states and 32519 transitions. [2022-02-15 04:26:49,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-15 04:26:49,354 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:49,354 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 04:26:49,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 04:26:49,354 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:49,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:49,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1463999138, now seen corresponding path program 1 times [2022-02-15 04:26:49,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:49,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801777066] [2022-02-15 04:26:49,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:49,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:49,356 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:49,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:49,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:49,379 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 04:26:49,379 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:49,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801777066] [2022-02-15 04:26:49,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1801777066] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:49,379 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:49,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:49,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611258525] [2022-02-15 04:26:49,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:49,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:49,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:49,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:49,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:49,381 INFO L87 Difference]: Start difference. First operand 22025 states and 32519 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 04:26:51,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:51,360 INFO L93 Difference]: Finished difference Result 33037 states and 48649 transitions. [2022-02-15 04:26:51,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:51,360 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 04:26:51,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:51,395 INFO L225 Difference]: With dead ends: 33037 [2022-02-15 04:26:51,395 INFO L226 Difference]: Without dead ends: 22283 [2022-02-15 04:26:51,417 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 04:26:51,418 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 188 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 139 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 04:26:51,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 139 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:51,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22283 states. [2022-02-15 04:26:53,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22283 to 22281. [2022-02-15 04:26:53,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22281 states, 22277 states have (on average 1.4596220316918795) internal successors, (32516), 22277 states have internal predecessors, (32516), 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 04:26:53,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22281 states to 22281 states and 32519 transitions. [2022-02-15 04:26:53,555 INFO L78 Accepts]: Start accepts. Automaton has 22281 states and 32519 transitions. Word has length 35 [2022-02-15 04:26:53,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:53,555 INFO L470 AbstractCegarLoop]: Abstraction has 22281 states and 32519 transitions. [2022-02-15 04:26:53,556 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 04:26:53,556 INFO L276 IsEmpty]: Start isEmpty. Operand 22281 states and 32519 transitions. [2022-02-15 04:26:53,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-15 04:26:53,568 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:53,568 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 04:26:53,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 04:26:53,568 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:53,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:53,569 INFO L85 PathProgramCache]: Analyzing trace with hash -224944604, now seen corresponding path program 1 times [2022-02-15 04:26:53,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:53,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602747064] [2022-02-15 04:26:53,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:53,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:53,570 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:53,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:53,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:53,601 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 04:26:53,601 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:53,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602747064] [2022-02-15 04:26:53,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [602747064] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:53,602 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:53,602 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:53,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144999136] [2022-02-15 04:26:53,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:53,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:53,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:53,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:53,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:53,603 INFO L87 Difference]: Start difference. First operand 22281 states and 32519 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 04:26:57,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:57,321 INFO L93 Difference]: Finished difference Result 65293 states and 94473 transitions. [2022-02-15 04:26:57,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:57,322 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 04:26:57,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:57,398 INFO L225 Difference]: With dead ends: 65293 [2022-02-15 04:26:57,399 INFO L226 Difference]: Without dead ends: 43531 [2022-02-15 04:26:57,447 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 04:26:57,447 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 208 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 117 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 04:26:57,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 117 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:57,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43531 states. [2022-02-15 04:27:01,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43531 to 43529. [2022-02-15 04:27:01,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43529 states, 43525 states have (on average 1.4234577828834003) internal successors, (61956), 43525 states have internal predecessors, (61956), 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 04:27:01,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43529 states to 43529 states and 61959 transitions. [2022-02-15 04:27:01,540 INFO L78 Accepts]: Start accepts. Automaton has 43529 states and 61959 transitions. Word has length 35 [2022-02-15 04:27:01,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:27:01,540 INFO L470 AbstractCegarLoop]: Abstraction has 43529 states and 61959 transitions. [2022-02-15 04:27:01,540 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 04:27:01,540 INFO L276 IsEmpty]: Start isEmpty. Operand 43529 states and 61959 transitions. [2022-02-15 04:27:01,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-15 04:27:01,563 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:27:01,563 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 04:27:01,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 04:27:01,564 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:27:01,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:27:01,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1769200102, now seen corresponding path program 1 times [2022-02-15 04:27:01,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:27:01,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936743734] [2022-02-15 04:27:01,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:27:01,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:27:01,565 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:27:01,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:27:01,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:27:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:27:01,586 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 04:27:01,586 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:27:01,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936743734] [2022-02-15 04:27:01,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [936743734] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:27:01,586 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:27:01,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:27:01,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812923609] [2022-02-15 04:27:01,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:27:01,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:27:01,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:27:01,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:27:01,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:27:01,587 INFO L87 Difference]: Start difference. First operand 43529 states and 61959 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 04:27:06,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:27:06,083 INFO L93 Difference]: Finished difference Result 49677 states and 73225 transitions. [2022-02-15 04:27:06,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:27:06,084 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 04:27:06,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:27:06,184 INFO L225 Difference]: With dead ends: 49677 [2022-02-15 04:27:06,184 INFO L226 Difference]: Without dead ends: 49675 [2022-02-15 04:27:06,207 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 04:27:06,208 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 129 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 156 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 04:27:06,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 156 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:27:06,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49675 states. [2022-02-15 04:27:10,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49675 to 43529. [2022-02-15 04:27:10,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43529 states, 43525 states have (on average 1.411694428489374) internal successors, (61444), 43525 states have internal predecessors, (61444), 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 04:27:10,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43529 states to 43529 states and 61447 transitions. [2022-02-15 04:27:10,384 INFO L78 Accepts]: Start accepts. Automaton has 43529 states and 61447 transitions. Word has length 35 [2022-02-15 04:27:10,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:27:10,384 INFO L470 AbstractCegarLoop]: Abstraction has 43529 states and 61447 transitions. [2022-02-15 04:27:10,384 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 04:27:10,384 INFO L276 IsEmpty]: Start isEmpty. Operand 43529 states and 61447 transitions. [2022-02-15 04:27:10,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 04:27:10,406 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:27:10,406 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 04:27:10,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 04:27:10,406 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:27:10,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:27:10,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1616866700, now seen corresponding path program 1 times [2022-02-15 04:27:10,407 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:27:10,407 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994253764] [2022-02-15 04:27:10,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:27:10,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:27:10,408 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:27:10,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:27:10,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:27:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:27:10,434 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 04:27:10,434 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:27:10,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994253764] [2022-02-15 04:27:10,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1994253764] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:27:10,435 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:27:10,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:27:10,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370911426] [2022-02-15 04:27:10,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:27:10,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:27:10,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:27:10,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:27:10,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:27:10,436 INFO L87 Difference]: Start difference. First operand 43529 states and 61447 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 04:27:17,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:27:17,530 INFO L93 Difference]: Finished difference Result 75277 states and 108553 transitions. [2022-02-15 04:27:17,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:27:17,531 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 04:27:17,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:27:17,670 INFO L225 Difference]: With dead ends: 75277 [2022-02-15 04:27:17,670 INFO L226 Difference]: Without dead ends: 75275 [2022-02-15 04:27:17,698 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 04:27:17,699 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 183 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 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 04:27:17,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 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 04:27:17,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75275 states. [2022-02-15 04:27:23,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75275 to 65033. [2022-02-15 04:27:23,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65033 states, 65029 states have (on average 1.3700349075028064) internal successors, (89092), 65029 states have internal predecessors, (89092), 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 04:27:24,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65033 states to 65033 states and 89095 transitions. [2022-02-15 04:27:24,083 INFO L78 Accepts]: Start accepts. Automaton has 65033 states and 89095 transitions. Word has length 36 [2022-02-15 04:27:24,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:27:24,083 INFO L470 AbstractCegarLoop]: Abstraction has 65033 states and 89095 transitions. [2022-02-15 04:27:24,084 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 04:27:24,084 INFO L276 IsEmpty]: Start isEmpty. Operand 65033 states and 89095 transitions. [2022-02-15 04:27:24,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 04:27:24,146 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:27:24,146 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 04:27:24,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 04:27:24,146 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:27:24,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:27:24,147 INFO L85 PathProgramCache]: Analyzing trace with hash -377278006, now seen corresponding path program 1 times [2022-02-15 04:27:24,147 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:27:24,147 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488910111] [2022-02-15 04:27:24,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:27:24,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:27:24,148 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:27:24,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:27:24,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:27:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:27:24,169 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 04:27:24,169 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:27:24,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488910111] [2022-02-15 04:27:24,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [488910111] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:27:24,169 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:27:24,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:27:24,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739181296] [2022-02-15 04:27:24,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:27:24,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:27:24,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:27:24,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:27:24,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:27:24,170 INFO L87 Difference]: Start difference. First operand 65033 states and 89095 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 04:27:32,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:27:32,383 INFO L93 Difference]: Finished difference Result 150029 states and 206857 transitions. [2022-02-15 04:27:32,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:27:32,384 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 04:27:32,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:27:32,766 INFO L225 Difference]: With dead ends: 150029 [2022-02-15 04:27:32,767 INFO L226 Difference]: Without dead ends: 85515 [2022-02-15 04:27:32,860 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 04:27:32,860 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 163 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 155 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 04:27:32,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 155 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:27:32,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85515 states. [2022-02-15 04:27:41,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85515 to 85513. [2022-02-15 04:27:41,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85513 states, 85509 states have (on average 1.3652364078634998) internal successors, (116740), 85509 states have internal predecessors, (116740), 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 04:27:41,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85513 states to 85513 states and 116743 transitions. [2022-02-15 04:27:41,555 INFO L78 Accepts]: Start accepts. Automaton has 85513 states and 116743 transitions. Word has length 36 [2022-02-15 04:27:41,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:27:41,555 INFO L470 AbstractCegarLoop]: Abstraction has 85513 states and 116743 transitions. [2022-02-15 04:27:41,555 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 04:27:41,555 INFO L276 IsEmpty]: Start isEmpty. Operand 85513 states and 116743 transitions. [2022-02-15 04:27:41,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-15 04:27:41,606 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:27:41,606 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:27:41,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 04:27:41,606 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:27:41,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:27:41,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1416524679, now seen corresponding path program 1 times [2022-02-15 04:27:41,606 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:27:41,606 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966875281] [2022-02-15 04:27:41,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:27:41,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:27:41,607 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:27:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:27:41,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:27:41,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:27:41,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:27:41,629 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:27:41,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966875281] [2022-02-15 04:27:41,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1966875281] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:27:41,629 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:27:41,629 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:27:41,629 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563027792] [2022-02-15 04:27:41,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:27:41,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:27:41,629 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:27:41,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:27:41,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:27:41,630 INFO L87 Difference]: Start difference. First operand 85513 states and 116743 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:27:50,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:27:50,168 INFO L93 Difference]: Finished difference Result 129037 states and 176137 transitions. [2022-02-15 04:27:50,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:27:50,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-02-15 04:27:50,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:27:50,339 INFO L225 Difference]: With dead ends: 129037 [2022-02-15 04:27:50,340 INFO L226 Difference]: Without dead ends: 87051 [2022-02-15 04:27:50,409 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 04:27:50,410 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 186 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 133 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 04:27:50,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 133 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:27:50,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87051 states. [2022-02-15 04:27:58,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87051 to 87049. [2022-02-15 04:27:58,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87049 states, 87045 states have (on average 1.3529094146705727) internal successors, (117764), 87045 states have internal predecessors, (117764), 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 04:27:59,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87049 states to 87049 states and 117767 transitions. [2022-02-15 04:27:59,101 INFO L78 Accepts]: Start accepts. Automaton has 87049 states and 117767 transitions. Word has length 37 [2022-02-15 04:27:59,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:27:59,102 INFO L470 AbstractCegarLoop]: Abstraction has 87049 states and 117767 transitions. [2022-02-15 04:27:59,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:27:59,102 INFO L276 IsEmpty]: Start isEmpty. Operand 87049 states and 117767 transitions. [2022-02-15 04:27:59,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-15 04:27:59,153 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:27:59,153 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:27:59,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 04:27:59,153 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:27:59,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:27:59,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1189498875, now seen corresponding path program 1 times [2022-02-15 04:27:59,154 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:27:59,154 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180918196] [2022-02-15 04:27:59,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:27:59,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:27:59,155 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:27:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:27:59,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:27:59,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:27:59,400 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 04:27:59,401 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:27:59,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180918196] [2022-02-15 04:27:59,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1180918196] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:27:59,401 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:27:59,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:27:59,401 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574813486] [2022-02-15 04:27:59,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:27:59,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:27:59,401 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:27:59,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:27:59,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:27:59,402 INFO L87 Difference]: Start difference. First operand 87049 states and 117767 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:28:14,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:28:14,194 INFO L93 Difference]: Finished difference Result 147469 states and 202761 transitions. [2022-02-15 04:28:14,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:28:14,194 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-02-15 04:28:14,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:28:14,695 INFO L225 Difference]: With dead ends: 147469 [2022-02-15 04:28:14,695 INFO L226 Difference]: Without dead ends: 147467 [2022-02-15 04:28:14,740 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 04:28:14,740 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 176 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 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 04:28:14,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 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 04:28:14,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147467 states. [2022-02-15 04:28:27,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147467 to 131081. [2022-02-15 04:28:28,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131081 states, 131077 states have (on average 1.312480450422271) internal successors, (172036), 131077 states have internal predecessors, (172036), 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 04:28:28,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131081 states to 131081 states and 172039 transitions. [2022-02-15 04:28:28,544 INFO L78 Accepts]: Start accepts. Automaton has 131081 states and 172039 transitions. Word has length 37 [2022-02-15 04:28:28,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:28:28,544 INFO L470 AbstractCegarLoop]: Abstraction has 131081 states and 172039 transitions. [2022-02-15 04:28:28,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:28:28,544 INFO L276 IsEmpty]: Start isEmpty. Operand 131081 states and 172039 transitions. [2022-02-15 04:28:28,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-15 04:28:28,652 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:28:28,653 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:28:28,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 04:28:28,653 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:28:28,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:28:28,653 INFO L85 PathProgramCache]: Analyzing trace with hash -804645831, now seen corresponding path program 1 times [2022-02-15 04:28:28,653 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:28:28,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029778551] [2022-02-15 04:28:28,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:28:28,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:28:28,655 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:28:28,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:28:28,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:28:28,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:28:28,681 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 04:28:28,681 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:28:28,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029778551] [2022-02-15 04:28:28,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1029778551] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:28:28,681 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:28:28,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:28:28,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492273894] [2022-02-15 04:28:28,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:28:28,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:28:28,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:28:28,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:28:28,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:28:28,682 INFO L87 Difference]: Start difference. First operand 131081 states and 172039 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)