/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops/eureka_05.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 01:12:16,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 01:12:16,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 01:12:16,737 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 01:12:16,763 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 01:12:16,764 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 01:12:16,764 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 01:12:16,765 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-24 01:12:16,773 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 01:12:16,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 01:12:16,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 01:12:16,774 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-24 01:12:16,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 01:12:16,775 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-24 01:12:16,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 01:12:16,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 01:12:16,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 01:12:16,776 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 01:12:16,776 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-24 01:12:16,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 01:12:16,776 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 01:12:16,776 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 01:12:16,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 01:12:16,777 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 01:12:16,777 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 01:12:16,777 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 01:12:16,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:12:16,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 01:12:16,778 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 01:12:16,778 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 01:12:16,778 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-24 01:12:16,778 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 01:12:17,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 01:12:17,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 01:12:17,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 01:12:17,035 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 01:12:17,036 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 01:12:17,037 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_05.i [2022-02-24 01:12:17,104 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4ff922ee/42551e90bbc9464e963f9692608a96de/FLAG459c06b57 [2022-02-24 01:12:17,467 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 01:12:17,468 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_05.i [2022-02-24 01:12:17,472 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4ff922ee/42551e90bbc9464e963f9692608a96de/FLAG459c06b57 [2022-02-24 01:12:17,482 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4ff922ee/42551e90bbc9464e963f9692608a96de [2022-02-24 01:12:17,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 01:12:17,485 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 01:12:17,487 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 01:12:17,487 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 01:12:17,490 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 01:12:17,490 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:12:17" (1/1) ... [2022-02-24 01:12:17,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30a0229e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:17, skipping insertion in model container [2022-02-24 01:12:17,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:12:17" (1/1) ... [2022-02-24 01:12:17,497 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 01:12:17,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 01:12:17,631 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_05.i[810,823] [2022-02-24 01:12:17,643 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:12:17,650 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 01:12:17,659 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_05.i[810,823] [2022-02-24 01:12:17,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:12:17,675 INFO L208 MainTranslator]: Completed translation [2022-02-24 01:12:17,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:17 WrapperNode [2022-02-24 01:12:17,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 01:12:17,677 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 01:12:17,677 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 01:12:17,677 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 01:12:17,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:17" (1/1) ... [2022-02-24 01:12:17,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:17" (1/1) ... [2022-02-24 01:12:17,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:17" (1/1) ... [2022-02-24 01:12:17,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:17" (1/1) ... [2022-02-24 01:12:17,712 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:17" (1/1) ... [2022-02-24 01:12:17,715 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:17" (1/1) ... [2022-02-24 01:12:17,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:17" (1/1) ... [2022-02-24 01:12:17,718 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 01:12:17,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 01:12:17,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 01:12:17,719 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 01:12:17,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:17" (1/1) ... [2022-02-24 01:12:17,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:12:17,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 01:12:17,751 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-24 01:12:17,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-24 01:12:17,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 01:12:17,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 01:12:17,789 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 01:12:17,789 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 01:12:17,790 INFO L138 BoogieDeclarations]: Found implementation of procedure SelectionSort [2022-02-24 01:12:17,790 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 01:12:17,790 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 01:12:17,791 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 01:12:17,791 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-24 01:12:17,791 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-24 01:12:17,791 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 01:12:17,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 01:12:17,792 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 01:12:17,792 INFO L130 BoogieDeclarations]: Found specification of procedure SelectionSort [2022-02-24 01:12:17,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 01:12:17,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 01:12:17,794 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 01:12:17,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-24 01:12:17,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 01:12:17,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 01:12:17,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 01:12:17,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 01:12:17,862 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 01:12:17,863 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 01:12:17,969 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 01:12:17,974 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 01:12:17,974 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-02-24 01:12:17,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:12:17 BoogieIcfgContainer [2022-02-24 01:12:17,976 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 01:12:17,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 01:12:17,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 01:12:17,981 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 01:12:17,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 01:12:17" (1/3) ... [2022-02-24 01:12:17,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ec4ce4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:12:17, skipping insertion in model container [2022-02-24 01:12:17,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:17" (2/3) ... [2022-02-24 01:12:17,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ec4ce4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:12:17, skipping insertion in model container [2022-02-24 01:12:17,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:12:17" (3/3) ... [2022-02-24 01:12:17,983 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_05.i [2022-02-24 01:12:17,987 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 01:12:17,987 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 01:12:18,044 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 01:12:18,050 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-02-24 01:12:18,050 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 01:12:18,078 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 01:12:18,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-24 01:12:18,085 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:18,085 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:18,086 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:18,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:18,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1995632546, now seen corresponding path program 1 times [2022-02-24 01:12:18,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:18,122 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606019652] [2022-02-24 01:12:18,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:18,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:18,189 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:12:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:18,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:18,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:18,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-24 01:12:18,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:18,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:18,334 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:18,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606019652] [2022-02-24 01:12:18,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [606019652] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:18,336 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:18,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:12:18,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649813363] [2022-02-24 01:12:18,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:18,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:12:18,344 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:18,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:12:18,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:12:18,368 INFO L87 Difference]: Start difference. First operand has 34 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:18,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:18,550 INFO L93 Difference]: Finished difference Result 77 states and 109 transitions. [2022-02-24 01:12:18,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 01:12:18,553 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-02-24 01:12:18,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:18,561 INFO L225 Difference]: With dead ends: 77 [2022-02-24 01:12:18,561 INFO L226 Difference]: Without dead ends: 43 [2022-02-24 01:12:18,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:12:18,567 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 67 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:18,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 30 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:18,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-24 01:12:18,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2022-02-24 01:12:18,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:18,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-02-24 01:12:18,608 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 18 [2022-02-24 01:12:18,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:18,609 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-02-24 01:12:18,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:18,609 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-02-24 01:12:18,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-24 01:12:18,610 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:18,610 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:18,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 01:12:18,611 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:18,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:18,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1221136232, now seen corresponding path program 1 times [2022-02-24 01:12:18,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:18,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420349989] [2022-02-24 01:12:18,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:18,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:18,615 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:12:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:18,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:18,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-24 01:12:18,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:18,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:18,684 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:18,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420349989] [2022-02-24 01:12:18,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [420349989] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:18,685 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:18,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 01:12:18,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648676347] [2022-02-24 01:12:18,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:18,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 01:12:18,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:18,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 01:12:18,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:12:18,687 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:18,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:18,846 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2022-02-24 01:12:18,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 01:12:18,847 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-02-24 01:12:18,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:18,849 INFO L225 Difference]: With dead ends: 59 [2022-02-24 01:12:18,849 INFO L226 Difference]: Without dead ends: 38 [2022-02-24 01:12:18,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:12:18,856 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 48 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:18,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 25 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:18,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-24 01:12:18,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2022-02-24 01:12:18,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:18,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-02-24 01:12:18,871 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2022-02-24 01:12:18,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:18,871 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-02-24 01:12:18,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:18,872 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-02-24 01:12:18,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 01:12:18,872 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:18,872 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:18,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 01:12:18,873 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:18,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:18,873 INFO L85 PathProgramCache]: Analyzing trace with hash -957735862, now seen corresponding path program 1 times [2022-02-24 01:12:18,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:18,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729389588] [2022-02-24 01:12:18,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:18,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:18,896 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:18,897 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:18,897 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:18,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:18,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:18,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:18,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 01:12:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:19,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:19,002 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:19,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729389588] [2022-02-24 01:12:19,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1729389588] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:19,002 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:19,003 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 01:12:19,003 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081382570] [2022-02-24 01:12:19,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:19,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 01:12:19,004 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:19,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 01:12:19,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-24 01:12:19,004 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:19,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:19,160 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2022-02-24 01:12:19,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 01:12:19,160 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-02-24 01:12:19,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:19,164 INFO L225 Difference]: With dead ends: 61 [2022-02-24 01:12:19,164 INFO L226 Difference]: Without dead ends: 40 [2022-02-24 01:12:19,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:12:19,172 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 50 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:19,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 25 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:19,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-24 01:12:19,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2022-02-24 01:12:19,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:19,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-02-24 01:12:19,188 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 20 [2022-02-24 01:12:19,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:19,189 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-02-24 01:12:19,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:19,189 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-02-24 01:12:19,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-24 01:12:19,190 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:19,190 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:19,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 01:12:19,190 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:19,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:19,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1090222252, now seen corresponding path program 2 times [2022-02-24 01:12:19,193 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:19,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074362442] [2022-02-24 01:12:19,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:19,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:19,202 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:19,203 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:19,203 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:19,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:19,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:19,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:19,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:12:19,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:19,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:19,318 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:19,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074362442] [2022-02-24 01:12:19,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2074362442] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:19,318 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:19,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 01:12:19,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590881811] [2022-02-24 01:12:19,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:19,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 01:12:19,320 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:19,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 01:12:19,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-24 01:12:19,321 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:19,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:19,529 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2022-02-24 01:12:19,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:12:19,529 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-02-24 01:12:19,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:19,532 INFO L225 Difference]: With dead ends: 51 [2022-02-24 01:12:19,533 INFO L226 Difference]: Without dead ends: 38 [2022-02-24 01:12:19,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:12:19,537 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 76 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:19,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 27 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:19,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-24 01:12:19,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2022-02-24 01:12:19,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:19,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-02-24 01:12:19,555 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2022-02-24 01:12:19,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:19,556 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-02-24 01:12:19,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:19,556 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-02-24 01:12:19,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 01:12:19,558 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:19,558 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:19,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 01:12:19,558 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:19,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:19,559 INFO L85 PathProgramCache]: Analyzing trace with hash -911525692, now seen corresponding path program 1 times [2022-02-24 01:12:19,559 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:19,559 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169181125] [2022-02-24 01:12:19,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:19,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:19,563 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:19,563 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:19,563 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:19,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:19,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:19,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:12:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:19,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:19,687 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:19,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169181125] [2022-02-24 01:12:19,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1169181125] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:19,688 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:19,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 01:12:19,689 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033587589] [2022-02-24 01:12:19,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:19,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:12:19,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:19,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:12:19,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:12:19,692 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:19,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:19,892 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2022-02-24 01:12:19,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 01:12:19,892 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-02-24 01:12:19,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:19,894 INFO L225 Difference]: With dead ends: 60 [2022-02-24 01:12:19,894 INFO L226 Difference]: Without dead ends: 41 [2022-02-24 01:12:19,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:12:19,898 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 91 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:19,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 27 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:19,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-02-24 01:12:19,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-02-24 01:12:19,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:19,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-02-24 01:12:19,911 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 26 [2022-02-24 01:12:19,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:19,912 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-02-24 01:12:19,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:19,912 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-02-24 01:12:19,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 01:12:19,912 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:19,913 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:19,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 01:12:19,913 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:19,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:19,913 INFO L85 PathProgramCache]: Analyzing trace with hash -588044416, now seen corresponding path program 1 times [2022-02-24 01:12:19,914 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:19,914 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798479872] [2022-02-24 01:12:19,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:19,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:19,919 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:19,919 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:19,919 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:19,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:19,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:19,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:19,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:12:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:20,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:20,007 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:20,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798479872] [2022-02-24 01:12:20,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1798479872] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:20,008 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:20,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 01:12:20,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376656688] [2022-02-24 01:12:20,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:20,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:12:20,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:20,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:12:20,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:12:20,011 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:20,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:20,193 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2022-02-24 01:12:20,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 01:12:20,193 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-02-24 01:12:20,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:20,195 INFO L225 Difference]: With dead ends: 58 [2022-02-24 01:12:20,196 INFO L226 Difference]: Without dead ends: 45 [2022-02-24 01:12:20,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:12:20,197 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 98 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:20,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 27 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:20,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-24 01:12:20,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2022-02-24 01:12:20,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:20,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-02-24 01:12:20,210 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 29 [2022-02-24 01:12:20,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:20,210 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-02-24 01:12:20,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:20,211 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-02-24 01:12:20,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 01:12:20,211 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:20,212 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:20,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 01:12:20,212 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:20,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:20,212 INFO L85 PathProgramCache]: Analyzing trace with hash 835149208, now seen corresponding path program 2 times [2022-02-24 01:12:20,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:20,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439557970] [2022-02-24 01:12:20,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:20,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:20,216 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:20,216 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:20,217 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:20,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:20,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:20,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:20,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:12:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:20,322 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:20,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439557970] [2022-02-24 01:12:20,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [439557970] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:20,322 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:20,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:12:20,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358102540] [2022-02-24 01:12:20,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:20,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 01:12:20,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:20,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 01:12:20,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:12:20,324 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:20,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:20,538 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2022-02-24 01:12:20,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:12:20,538 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-02-24 01:12:20,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:20,539 INFO L225 Difference]: With dead ends: 69 [2022-02-24 01:12:20,539 INFO L226 Difference]: Without dead ends: 50 [2022-02-24 01:12:20,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:12:20,541 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 126 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:20,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 27 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:20,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-24 01:12:20,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2022-02-24 01:12:20,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:20,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-02-24 01:12:20,556 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 33 [2022-02-24 01:12:20,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:20,557 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-02-24 01:12:20,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:20,558 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-02-24 01:12:20,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 01:12:20,563 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:20,563 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:20,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 01:12:20,568 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:20,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:20,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1075110444, now seen corresponding path program 3 times [2022-02-24 01:12:20,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:20,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907664471] [2022-02-24 01:12:20,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:20,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:20,573 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:20,573 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:20,573 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:20,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:20,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:20,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:12:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:20,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:20,677 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:20,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907664471] [2022-02-24 01:12:20,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1907664471] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:20,677 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:20,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:12:20,677 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503593122] [2022-02-24 01:12:20,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:20,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 01:12:20,678 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:20,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 01:12:20,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:12:20,679 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:20,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:20,899 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2022-02-24 01:12:20,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:12:20,900 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2022-02-24 01:12:20,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:20,901 INFO L225 Difference]: With dead ends: 69 [2022-02-24 01:12:20,901 INFO L226 Difference]: Without dead ends: 46 [2022-02-24 01:12:20,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:12:20,902 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 106 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:20,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 29 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:20,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-02-24 01:12:20,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2022-02-24 01:12:20,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:20,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-02-24 01:12:20,911 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 36 [2022-02-24 01:12:20,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:20,911 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-02-24 01:12:20,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:20,911 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-02-24 01:12:20,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-24 01:12:20,912 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:20,912 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:20,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 01:12:20,912 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:20,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:20,913 INFO L85 PathProgramCache]: Analyzing trace with hash 482252264, now seen corresponding path program 4 times [2022-02-24 01:12:20,913 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:20,913 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827522725] [2022-02-24 01:12:20,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:20,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:20,916 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:20,916 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:20,916 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:20,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:20,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:20,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:12:20,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:20,996 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:20,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827522725] [2022-02-24 01:12:20,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1827522725] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:20,996 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:20,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:12:20,996 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961109471] [2022-02-24 01:12:20,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:20,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:12:20,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:20,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:12:20,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:12:20,997 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:21,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:21,214 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2022-02-24 01:12:21,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:12:21,215 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2022-02-24 01:12:21,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:21,215 INFO L225 Difference]: With dead ends: 72 [2022-02-24 01:12:21,216 INFO L226 Difference]: Without dead ends: 49 [2022-02-24 01:12:21,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:12:21,217 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 123 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:21,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 27 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:21,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-02-24 01:12:21,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2022-02-24 01:12:21,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 39 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:21,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-02-24 01:12:21,228 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 39 [2022-02-24 01:12:21,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:21,228 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-02-24 01:12:21,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:21,228 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-02-24 01:12:21,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 01:12:21,229 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:21,229 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:21,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 01:12:21,229 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:21,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:21,230 INFO L85 PathProgramCache]: Analyzing trace with hash -450266964, now seen corresponding path program 5 times [2022-02-24 01:12:21,230 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:21,230 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008224712] [2022-02-24 01:12:21,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:21,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:21,233 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:21,233 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:21,233 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:21,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:21,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:21,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:21,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:12:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:21,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:21,325 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:21,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008224712] [2022-02-24 01:12:21,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1008224712] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:21,326 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:21,326 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:12:21,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795072251] [2022-02-24 01:12:21,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:21,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:12:21,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:21,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:12:21,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:12:21,329 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:21,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:21,588 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2022-02-24 01:12:21,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:12:21,588 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42 [2022-02-24 01:12:21,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:21,589 INFO L225 Difference]: With dead ends: 75 [2022-02-24 01:12:21,589 INFO L226 Difference]: Without dead ends: 52 [2022-02-24 01:12:21,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:12:21,590 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 137 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:21,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 31 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:21,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-24 01:12:21,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2022-02-24 01:12:21,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 42 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:21,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2022-02-24 01:12:21,599 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 42 [2022-02-24 01:12:21,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:21,600 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2022-02-24 01:12:21,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:21,600 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2022-02-24 01:12:21,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-24 01:12:21,600 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:21,600 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:21,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 01:12:21,601 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:21,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:21,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1282117784, now seen corresponding path program 6 times [2022-02-24 01:12:21,601 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:21,601 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129346995] [2022-02-24 01:12:21,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:21,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:21,604 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:21,604 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:21,604 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:21,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:21,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:21,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:12:21,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:21,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:21,685 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:21,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129346995] [2022-02-24 01:12:21,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1129346995] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:21,685 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:21,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:12:21,686 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061109035] [2022-02-24 01:12:21,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:21,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:12:21,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:21,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:12:21,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:12:21,687 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:21,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:21,947 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2022-02-24 01:12:21,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 01:12:21,948 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-02-24 01:12:21,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:21,948 INFO L225 Difference]: With dead ends: 79 [2022-02-24 01:12:21,949 INFO L226 Difference]: Without dead ends: 60 [2022-02-24 01:12:21,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:12:21,950 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 156 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:21,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 27 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:21,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-24 01:12:21,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2022-02-24 01:12:21,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:21,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2022-02-24 01:12:21,962 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 45 [2022-02-24 01:12:21,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:21,962 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2022-02-24 01:12:21,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:21,962 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2022-02-24 01:12:21,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 01:12:21,967 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:21,967 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:21,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 01:12:21,968 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:21,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:21,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1463860828, now seen corresponding path program 7 times [2022-02-24 01:12:21,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:21,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502605137] [2022-02-24 01:12:21,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:21,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:21,971 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:21,971 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:21,971 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:22,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:22,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:12:22,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:22,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:22,099 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:22,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502605137] [2022-02-24 01:12:22,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1502605137] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:22,100 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:22,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:12:22,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266190963] [2022-02-24 01:12:22,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:22,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:12:22,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:22,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:12:22,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:12:22,101 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:22,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:22,380 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2022-02-24 01:12:22,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:12:22,381 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2022-02-24 01:12:22,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:22,381 INFO L225 Difference]: With dead ends: 82 [2022-02-24 01:12:22,381 INFO L226 Difference]: Without dead ends: 63 [2022-02-24 01:12:22,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=395, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:12:22,384 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 182 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:22,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 31 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:22,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-24 01:12:22,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2022-02-24 01:12:22,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:22,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2022-02-24 01:12:22,399 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 48 [2022-02-24 01:12:22,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:22,399 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2022-02-24 01:12:22,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:22,399 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2022-02-24 01:12:22,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 01:12:22,399 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:22,400 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:22,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 01:12:22,400 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:22,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:22,400 INFO L85 PathProgramCache]: Analyzing trace with hash 670604008, now seen corresponding path program 8 times [2022-02-24 01:12:22,401 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:22,401 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789630348] [2022-02-24 01:12:22,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:22,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:22,404 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:22,404 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:22,404 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:22,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:22,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:22,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:12:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:22,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:22,505 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:22,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789630348] [2022-02-24 01:12:22,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [789630348] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:22,505 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:22,505 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:12:22,506 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001787653] [2022-02-24 01:12:22,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:22,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 01:12:22,506 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:22,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 01:12:22,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:12:22,507 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:22,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:22,694 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2022-02-24 01:12:22,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:12:22,694 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2022-02-24 01:12:22,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:22,695 INFO L225 Difference]: With dead ends: 80 [2022-02-24 01:12:22,695 INFO L226 Difference]: Without dead ends: 67 [2022-02-24 01:12:22,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:12:22,696 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 119 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:22,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 29 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:22,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-02-24 01:12:22,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2022-02-24 01:12:22,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 54 states have internal predecessors, (68), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:22,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2022-02-24 01:12:22,709 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 51 [2022-02-24 01:12:22,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:22,709 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2022-02-24 01:12:22,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:22,709 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2022-02-24 01:12:22,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 01:12:22,709 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:22,710 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:22,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 01:12:22,710 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:22,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:22,710 INFO L85 PathProgramCache]: Analyzing trace with hash -862659328, now seen corresponding path program 9 times [2022-02-24 01:12:22,710 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:22,710 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156050848] [2022-02-24 01:12:22,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:22,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:22,713 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:22,713 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:22,713 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:22,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:22,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:22,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:22,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:12:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:22,798 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:22,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156050848] [2022-02-24 01:12:22,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [156050848] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:22,798 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:22,798 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:12:22,798 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012336469] [2022-02-24 01:12:22,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:22,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:12:22,799 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:22,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:12:22,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:12:22,799 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:23,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:23,056 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2022-02-24 01:12:23,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 01:12:23,056 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-02-24 01:12:23,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:23,057 INFO L225 Difference]: With dead ends: 89 [2022-02-24 01:12:23,057 INFO L226 Difference]: Without dead ends: 70 [2022-02-24 01:12:23,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:12:23,058 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 157 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:23,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 31 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:23,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-02-24 01:12:23,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2022-02-24 01:12:23,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.2545454545454546) internal successors, (69), 55 states have internal predecessors, (69), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:23,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-02-24 01:12:23,089 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 55 [2022-02-24 01:12:23,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:23,090 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-02-24 01:12:23,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:23,090 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-02-24 01:12:23,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:12:23,090 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:23,090 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:23,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 01:12:23,091 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:23,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:23,091 INFO L85 PathProgramCache]: Analyzing trace with hash -804107836, now seen corresponding path program 10 times [2022-02-24 01:12:23,091 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:23,091 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674571844] [2022-02-24 01:12:23,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:23,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:23,094 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:23,094 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:23,094 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:23,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:23,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:23,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:12:23,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:23,184 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:23,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674571844] [2022-02-24 01:12:23,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [674571844] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:23,185 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:23,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:12:23,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460509079] [2022-02-24 01:12:23,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:23,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:12:23,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:23,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:12:23,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:12:23,186 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 11 states, 10 states have (on average 3.5) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:23,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:23,509 INFO L93 Difference]: Finished difference Result 92 states and 113 transitions. [2022-02-24 01:12:23,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:12:23,510 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-02-24 01:12:23,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:23,510 INFO L225 Difference]: With dead ends: 92 [2022-02-24 01:12:23,510 INFO L226 Difference]: Without dead ends: 73 [2022-02-24 01:12:23,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:12:23,511 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 196 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:23,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 33 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:23,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-02-24 01:12:23,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2022-02-24 01:12:23,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 58 states have internal predecessors, (73), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:23,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2022-02-24 01:12:23,525 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 58 [2022-02-24 01:12:23,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:23,525 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2022-02-24 01:12:23,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:23,525 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2022-02-24 01:12:23,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 01:12:23,526 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:23,526 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:23,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 01:12:23,526 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:23,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:23,526 INFO L85 PathProgramCache]: Analyzing trace with hash -253331840, now seen corresponding path program 11 times [2022-02-24 01:12:23,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:23,527 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812293913] [2022-02-24 01:12:23,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:23,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:23,529 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:23,529 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:23,529 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:23,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:23,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:23,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:12:23,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:23,615 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:23,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812293913] [2022-02-24 01:12:23,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [812293913] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:23,616 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:23,616 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:12:23,616 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744892407] [2022-02-24 01:12:23,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:23,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:12:23,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:23,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:12:23,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:12:23,617 INFO L87 Difference]: Start difference. First operand 66 states and 80 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:23,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:23,829 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2022-02-24 01:12:23,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:12:23,829 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-02-24 01:12:23,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:23,830 INFO L225 Difference]: With dead ends: 90 [2022-02-24 01:12:23,830 INFO L226 Difference]: Without dead ends: 77 [2022-02-24 01:12:23,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:12:23,832 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 144 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:23,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 27 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:23,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-24 01:12:23,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2022-02-24 01:12:23,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 64 states have (on average 1.265625) internal successors, (81), 64 states have internal predecessors, (81), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:23,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2022-02-24 01:12:23,848 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 61 [2022-02-24 01:12:23,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:23,849 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2022-02-24 01:12:23,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:23,849 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2022-02-24 01:12:23,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-24 01:12:23,849 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:23,849 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:23,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 01:12:23,850 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:23,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:23,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1836788888, now seen corresponding path program 12 times [2022-02-24 01:12:23,850 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:23,850 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249145328] [2022-02-24 01:12:23,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:23,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:23,853 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:23,854 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:23,854 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:23,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:23,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:23,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:23,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:12:23,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:23,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:23,950 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:23,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249145328] [2022-02-24 01:12:23,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1249145328] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:23,951 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:23,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:12:23,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30693943] [2022-02-24 01:12:23,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:23,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:12:23,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:23,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:12:23,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:12:23,952 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 11 states, 10 states have (on average 3.9) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:24,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:24,287 INFO L93 Difference]: Finished difference Result 99 states and 122 transitions. [2022-02-24 01:12:24,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:12:24,287 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.9) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 65 [2022-02-24 01:12:24,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:24,288 INFO L225 Difference]: With dead ends: 99 [2022-02-24 01:12:24,288 INFO L226 Difference]: Without dead ends: 80 [2022-02-24 01:12:24,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:12:24,289 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 192 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:24,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 31 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:24,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-24 01:12:24,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2022-02-24 01:12:24,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 65 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:24,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2022-02-24 01:12:24,308 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 65 [2022-02-24 01:12:24,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:24,309 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2022-02-24 01:12:24,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.9) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:24,309 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2022-02-24 01:12:24,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:12:24,309 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:24,310 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:24,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 01:12:24,310 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:24,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:24,310 INFO L85 PathProgramCache]: Analyzing trace with hash -509955284, now seen corresponding path program 13 times [2022-02-24 01:12:24,310 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:24,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786705056] [2022-02-24 01:12:24,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:24,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:24,313 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:24,314 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:24,314 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:24,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:24,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:12:24,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:24,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:24,437 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:24,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786705056] [2022-02-24 01:12:24,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1786705056] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:24,437 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:24,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:12:24,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148947970] [2022-02-24 01:12:24,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:24,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:12:24,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:24,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:12:24,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:12:24,438 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand has 11 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:24,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:24,680 INFO L93 Difference]: Finished difference Result 97 states and 118 transitions. [2022-02-24 01:12:24,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:12:24,680 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 68 [2022-02-24 01:12:24,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:24,681 INFO L225 Difference]: With dead ends: 97 [2022-02-24 01:12:24,681 INFO L226 Difference]: Without dead ends: 84 [2022-02-24 01:12:24,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:12:24,682 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 165 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:24,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 27 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:24,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-02-24 01:12:24,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2022-02-24 01:12:24,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 71 states have (on average 1.267605633802817) internal successors, (90), 71 states have internal predecessors, (90), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:24,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2022-02-24 01:12:24,700 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 68 [2022-02-24 01:12:24,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:24,700 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2022-02-24 01:12:24,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:24,700 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2022-02-24 01:12:24,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:12:24,701 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:24,701 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:24,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 01:12:24,701 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:24,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:24,701 INFO L85 PathProgramCache]: Analyzing trace with hash 992555844, now seen corresponding path program 14 times [2022-02-24 01:12:24,702 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:24,702 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656631] [2022-02-24 01:12:24,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:24,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:24,704 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:24,704 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:24,704 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:24,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:24,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:24,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:24,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 01:12:24,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:24,765 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:24,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656631] [2022-02-24 01:12:24,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [656631] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:24,766 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:24,766 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 01:12:24,766 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908472561] [2022-02-24 01:12:24,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:24,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 01:12:24,766 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:24,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 01:12:24,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-24 01:12:24,767 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:24,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:24,897 INFO L93 Difference]: Finished difference Result 150 states and 186 transitions. [2022-02-24 01:12:24,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:12:24,897 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-02-24 01:12:24,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:24,898 INFO L225 Difference]: With dead ends: 150 [2022-02-24 01:12:24,898 INFO L226 Difference]: Without dead ends: 82 [2022-02-24 01:12:24,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:12:24,899 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 48 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:24,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 29 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:24,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-02-24 01:12:24,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2022-02-24 01:12:24,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 73 states have (on average 1.2602739726027397) internal successors, (92), 73 states have internal predecessors, (92), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:24,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 99 transitions. [2022-02-24 01:12:24,916 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 99 transitions. Word has length 72 [2022-02-24 01:12:24,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:24,916 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 99 transitions. [2022-02-24 01:12:24,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:24,917 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 99 transitions. [2022-02-24 01:12:24,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:12:24,917 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:24,917 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:24,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 01:12:24,918 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:24,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:24,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1493400922, now seen corresponding path program 15 times [2022-02-24 01:12:24,918 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:24,918 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815078219] [2022-02-24 01:12:24,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:24,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:24,921 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:24,921 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:24,921 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:24,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:24,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:12:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:25,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:25,015 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:25,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815078219] [2022-02-24 01:12:25,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1815078219] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:25,015 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:25,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:12:25,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102217849] [2022-02-24 01:12:25,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:25,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:12:25,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:25,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:12:25,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:12:25,017 INFO L87 Difference]: Start difference. First operand 81 states and 99 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:25,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:25,162 INFO L93 Difference]: Finished difference Result 152 states and 188 transitions. [2022-02-24 01:12:25,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 01:12:25,162 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 74 [2022-02-24 01:12:25,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:25,163 INFO L225 Difference]: With dead ends: 152 [2022-02-24 01:12:25,163 INFO L226 Difference]: Without dead ends: 84 [2022-02-24 01:12:25,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:12:25,164 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 50 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:25,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 29 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:25,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-02-24 01:12:25,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-02-24 01:12:25,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 75 states have internal predecessors, (94), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:25,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2022-02-24 01:12:25,183 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 74 [2022-02-24 01:12:25,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:25,183 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2022-02-24 01:12:25,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:25,183 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2022-02-24 01:12:25,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:12:25,184 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:25,184 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:25,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 01:12:25,184 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:25,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:25,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1798930824, now seen corresponding path program 16 times [2022-02-24 01:12:25,185 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:25,185 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410882743] [2022-02-24 01:12:25,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:25,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:25,188 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:25,188 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:25,188 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:25,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:25,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:25,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-24 01:12:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:25,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:25,265 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:25,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410882743] [2022-02-24 01:12:25,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1410882743] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:25,266 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:25,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:12:25,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636569191] [2022-02-24 01:12:25,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:25,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 01:12:25,266 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:25,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 01:12:25,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:12:25,267 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:25,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:25,485 INFO L93 Difference]: Finished difference Result 169 states and 209 transitions. [2022-02-24 01:12:25,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:12:25,485 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76 [2022-02-24 01:12:25,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:25,486 INFO L225 Difference]: With dead ends: 169 [2022-02-24 01:12:25,486 INFO L226 Difference]: Without dead ends: 101 [2022-02-24 01:12:25,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:12:25,487 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 60 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:25,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 37 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:25,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-02-24 01:12:25,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 85. [2022-02-24 01:12:25,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 77 states have (on average 1.2467532467532467) internal successors, (96), 77 states have internal predecessors, (96), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:25,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2022-02-24 01:12:25,504 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 76 [2022-02-24 01:12:25,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:25,505 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2022-02-24 01:12:25,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:25,505 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2022-02-24 01:12:25,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-24 01:12:25,505 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:25,505 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:25,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 01:12:25,506 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:25,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:25,506 INFO L85 PathProgramCache]: Analyzing trace with hash 338841578, now seen corresponding path program 17 times [2022-02-24 01:12:25,506 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:25,506 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947243033] [2022-02-24 01:12:25,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:25,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:25,509 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:25,509 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:25,509 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:25,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:25,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:25,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 01:12:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:26,000 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:26,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947243033] [2022-02-24 01:12:26,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1947243033] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:26,000 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:26,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:12:26,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267514526] [2022-02-24 01:12:26,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:26,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:12:26,001 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:26,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:12:26,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:12:26,002 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:26,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:26,421 INFO L93 Difference]: Finished difference Result 149 states and 183 transitions. [2022-02-24 01:12:26,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 01:12:26,423 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 78 [2022-02-24 01:12:26,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:26,424 INFO L225 Difference]: With dead ends: 149 [2022-02-24 01:12:26,424 INFO L226 Difference]: Without dead ends: 89 [2022-02-24 01:12:26,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:12:26,425 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 75 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:26,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 23 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:12:26,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-02-24 01:12:26,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-02-24 01:12:26,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 80 states have (on average 1.2375) internal successors, (99), 80 states have internal predecessors, (99), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:26,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2022-02-24 01:12:26,450 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 78 [2022-02-24 01:12:26,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:26,451 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2022-02-24 01:12:26,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:26,451 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2022-02-24 01:12:26,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-24 01:12:26,452 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:26,452 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:26,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 01:12:26,452 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:26,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:26,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1214860584, now seen corresponding path program 1 times [2022-02-24 01:12:26,453 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:26,453 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785903066] [2022-02-24 01:12:26,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:26,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:26,456 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:26,456 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:26,456 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:26,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:26,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:26,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 01:12:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:27,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:27,322 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:27,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785903066] [2022-02-24 01:12:27,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [785903066] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:27,323 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:27,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:12:27,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459859105] [2022-02-24 01:12:27,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:27,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:12:27,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:27,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:12:27,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:12:27,324 INFO L87 Difference]: Start difference. First operand 88 states and 106 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 24 states have internal predecessors, (46), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:31,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:31,785 INFO L93 Difference]: Finished difference Result 388 states and 511 transitions. [2022-02-24 01:12:31,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-24 01:12:31,785 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 24 states have internal predecessors, (46), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 78 [2022-02-24 01:12:31,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:31,788 INFO L225 Difference]: With dead ends: 388 [2022-02-24 01:12:31,788 INFO L226 Difference]: Without dead ends: 346 [2022-02-24 01:12:31,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2662 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1501, Invalid=7429, Unknown=0, NotChecked=0, Total=8930 [2022-02-24 01:12:31,791 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 210 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:31,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 37 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:12:31,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-02-24 01:12:31,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 211. [2022-02-24 01:12:31,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 203 states have (on average 1.3842364532019704) internal successors, (281), 203 states have internal predecessors, (281), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:31,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 288 transitions. [2022-02-24 01:12:31,865 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 288 transitions. Word has length 78 [2022-02-24 01:12:31,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:31,865 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 288 transitions. [2022-02-24 01:12:31,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 24 states have internal predecessors, (46), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:31,865 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 288 transitions. [2022-02-24 01:12:31,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-24 01:12:31,866 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:31,867 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:31,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 01:12:31,867 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:31,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:31,867 INFO L85 PathProgramCache]: Analyzing trace with hash 370855082, now seen corresponding path program 2 times [2022-02-24 01:12:31,867 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:31,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763062394] [2022-02-24 01:12:31,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:31,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:31,870 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:31,870 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:31,871 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:31,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:31,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:31,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 01:12:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:32,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:32,600 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:32,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763062394] [2022-02-24 01:12:32,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1763062394] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:32,600 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:32,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:12:32,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882223823] [2022-02-24 01:12:32,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:32,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:12:32,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:32,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:12:32,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:12:32,602 INFO L87 Difference]: Start difference. First operand 211 states and 288 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 states have internal predecessors, (53), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:36,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:36,428 INFO L93 Difference]: Finished difference Result 763 states and 1072 transitions. [2022-02-24 01:12:36,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-24 01:12:36,431 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 states have internal predecessors, (53), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 78 [2022-02-24 01:12:36,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:36,433 INFO L225 Difference]: With dead ends: 763 [2022-02-24 01:12:36,433 INFO L226 Difference]: Without dead ends: 649 [2022-02-24 01:12:36,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2247 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1609, Invalid=6401, Unknown=0, NotChecked=0, Total=8010 [2022-02-24 01:12:36,437 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 361 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:36,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 43 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [343 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:12:36,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-02-24 01:12:36,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 549. [2022-02-24 01:12:36,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 541 states have (on average 1.432532347504621) internal successors, (775), 541 states have internal predecessors, (775), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:36,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 782 transitions. [2022-02-24 01:12:36,727 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 782 transitions. Word has length 78 [2022-02-24 01:12:36,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:36,727 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 782 transitions. [2022-02-24 01:12:36,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 states have internal predecessors, (53), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:36,728 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 782 transitions. [2022-02-24 01:12:36,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-24 01:12:36,729 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:36,729 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 7, 5, 5, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:36,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 01:12:36,729 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:36,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:36,730 INFO L85 PathProgramCache]: Analyzing trace with hash -138618008, now seen corresponding path program 3 times [2022-02-24 01:12:36,730 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:36,730 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992215157] [2022-02-24 01:12:36,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:36,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:36,733 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:36,733 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:36,733 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:36,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:36,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:36,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 01:12:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:37,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:37,361 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:37,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992215157] [2022-02-24 01:12:37,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [992215157] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:37,361 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:37,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:12:37,361 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206793315] [2022-02-24 01:12:37,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:37,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:12:37,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:37,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:12:37,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:12:37,362 INFO L87 Difference]: Start difference. First operand 549 states and 782 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 21 states have internal predecessors, (46), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:40,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:40,013 INFO L93 Difference]: Finished difference Result 1306 states and 1848 transitions. [2022-02-24 01:12:40,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-24 01:12:40,014 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 21 states have internal predecessors, (46), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 78 [2022-02-24 01:12:40,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:40,020 INFO L225 Difference]: With dead ends: 1306 [2022-02-24 01:12:40,020 INFO L226 Difference]: Without dead ends: 964 [2022-02-24 01:12:40,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1797 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1127, Invalid=4879, Unknown=0, NotChecked=0, Total=6006 [2022-02-24 01:12:40,023 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 247 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:40,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 31 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:12:40,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2022-02-24 01:12:40,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 761. [2022-02-24 01:12:40,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 753 states have (on average 1.4395750332005313) internal successors, (1084), 753 states have internal predecessors, (1084), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:40,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1091 transitions. [2022-02-24 01:12:40,371 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1091 transitions. Word has length 78 [2022-02-24 01:12:40,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:40,372 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 1091 transitions. [2022-02-24 01:12:40,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 21 states have internal predecessors, (46), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:40,372 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1091 transitions. [2022-02-24 01:12:40,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-24 01:12:40,373 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:40,373 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 7, 5, 5, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:40,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 01:12:40,374 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:40,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:40,374 INFO L85 PathProgramCache]: Analyzing trace with hash 794501804, now seen corresponding path program 4 times [2022-02-24 01:12:40,374 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:40,374 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800914924] [2022-02-24 01:12:40,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:40,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:40,377 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:40,377 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:40,377 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:40,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:40,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:40,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:40,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 01:12:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:41,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:41,355 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:41,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800914924] [2022-02-24 01:12:41,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [800914924] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:41,355 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:41,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:12:41,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675400874] [2022-02-24 01:12:41,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:41,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:12:41,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:41,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:12:41,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:12:41,358 INFO L87 Difference]: Start difference. First operand 761 states and 1091 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 32 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:47,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:47,204 INFO L93 Difference]: Finished difference Result 1377 states and 1929 transitions. [2022-02-24 01:12:47,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-02-24 01:12:47,205 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 32 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 78 [2022-02-24 01:12:47,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:47,211 INFO L225 Difference]: With dead ends: 1377 [2022-02-24 01:12:47,211 INFO L226 Difference]: Without dead ends: 1335 [2022-02-24 01:12:47,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4727 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1964, Invalid=13786, Unknown=0, NotChecked=0, Total=15750 [2022-02-24 01:12:47,216 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 620 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 549 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 549 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:47,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [621 Valid, 50 Invalid, 1888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [549 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:12:47,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2022-02-24 01:12:47,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 709. [2022-02-24 01:12:47,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 701 states have (on average 1.37660485021398) internal successors, (965), 701 states have internal predecessors, (965), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:47,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 972 transitions. [2022-02-24 01:12:47,608 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 972 transitions. Word has length 78 [2022-02-24 01:12:47,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:47,608 INFO L470 AbstractCegarLoop]: Abstraction has 709 states and 972 transitions. [2022-02-24 01:12:47,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 32 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:47,608 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 972 transitions. [2022-02-24 01:12:47,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-24 01:12:47,610 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:47,610 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:47,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 01:12:47,610 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:47,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:47,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1199642902, now seen corresponding path program 5 times [2022-02-24 01:12:47,610 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:47,611 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134097303] [2022-02-24 01:12:47,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:47,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:47,613 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:47,613 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:47,614 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:47,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:47,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:47,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:47,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 01:12:47,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:48,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:48,124 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:48,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134097303] [2022-02-24 01:12:48,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [134097303] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:48,124 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:48,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:12:48,124 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203719308] [2022-02-24 01:12:48,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:48,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:12:48,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:48,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:12:48,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:12:48,126 INFO L87 Difference]: Start difference. First operand 709 states and 972 transitions. Second operand has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:49,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:49,147 INFO L93 Difference]: Finished difference Result 1267 states and 1750 transitions. [2022-02-24 01:12:49,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:12:49,147 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 78 [2022-02-24 01:12:49,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:49,150 INFO L225 Difference]: With dead ends: 1267 [2022-02-24 01:12:49,150 INFO L226 Difference]: Without dead ends: 692 [2022-02-24 01:12:49,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=924, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:12:49,152 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 77 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:49,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 23 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:12:49,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2022-02-24 01:12:49,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 691. [2022-02-24 01:12:49,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 683 states have (on average 1.3806734992679355) internal successors, (943), 683 states have internal predecessors, (943), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:49,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 950 transitions. [2022-02-24 01:12:49,522 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 950 transitions. Word has length 78 [2022-02-24 01:12:49,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:49,522 INFO L470 AbstractCegarLoop]: Abstraction has 691 states and 950 transitions. [2022-02-24 01:12:49,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:49,522 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 950 transitions. [2022-02-24 01:12:49,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-24 01:12:49,524 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:49,524 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 7, 5, 5, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:49,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 01:12:49,524 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:49,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:49,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1159877924, now seen corresponding path program 6 times [2022-02-24 01:12:49,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:49,525 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038624871] [2022-02-24 01:12:49,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:49,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:49,527 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:49,527 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:49,527 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:49,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:49,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:49,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:49,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 01:12:49,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:50,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:50,418 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:50,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038624871] [2022-02-24 01:12:50,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1038624871] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:50,419 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:50,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:12:50,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618085856] [2022-02-24 01:12:50,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:50,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:12:50,419 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:50,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:12:50,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:12:50,420 INFO L87 Difference]: Start difference. First operand 691 states and 950 transitions. Second operand has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 19 states have internal predecessors, (42), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:52,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:52,452 INFO L93 Difference]: Finished difference Result 1276 states and 1767 transitions. [2022-02-24 01:12:52,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 01:12:52,452 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 19 states have internal predecessors, (42), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 78 [2022-02-24 01:12:52,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:52,455 INFO L225 Difference]: With dead ends: 1276 [2022-02-24 01:12:52,455 INFO L226 Difference]: Without dead ends: 732 [2022-02-24 01:12:52,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=296, Invalid=1596, Unknown=0, NotChecked=0, Total=1892 [2022-02-24 01:12:52,457 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 123 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:52,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 28 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:12:52,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-02-24 01:12:52,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 711. [2022-02-24 01:12:52,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 703 states have (on average 1.3812233285917497) internal successors, (971), 703 states have internal predecessors, (971), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:52,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 978 transitions. [2022-02-24 01:12:52,841 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 978 transitions. Word has length 78 [2022-02-24 01:12:52,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:52,842 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 978 transitions. [2022-02-24 01:12:52,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 19 states have internal predecessors, (42), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:52,842 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 978 transitions. [2022-02-24 01:12:52,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-24 01:12:52,843 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:52,843 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:52,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 01:12:52,844 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:52,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:52,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1583524646, now seen corresponding path program 7 times [2022-02-24 01:12:52,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:52,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66877497] [2022-02-24 01:12:52,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:52,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:52,847 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:52,847 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:52,847 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:53,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:53,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 01:12:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:53,949 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:53,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66877497] [2022-02-24 01:12:53,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [66877497] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:53,949 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:53,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:12:53,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961602606] [2022-02-24 01:12:53,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:53,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:12:53,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:53,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:12:53,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:12:53,951 INFO L87 Difference]: Start difference. First operand 711 states and 978 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 33 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:59,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:59,807 INFO L93 Difference]: Finished difference Result 1852 states and 2515 transitions. [2022-02-24 01:12:59,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-24 01:12:59,808 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 33 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 78 [2022-02-24 01:12:59,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:59,812 INFO L225 Difference]: With dead ends: 1852 [2022-02-24 01:12:59,812 INFO L226 Difference]: Without dead ends: 1763 [2022-02-24 01:12:59,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4002 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1778, Invalid=12028, Unknown=0, NotChecked=0, Total=13806 [2022-02-24 01:12:59,816 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 399 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1587 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 1587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:59,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 46 Invalid, 1936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 1587 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:12:59,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2022-02-24 01:13:00,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1244. [2022-02-24 01:13:00,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1236 states have (on average 1.3932038834951457) internal successors, (1722), 1236 states have internal predecessors, (1722), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:13:00,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1729 transitions. [2022-02-24 01:13:00,574 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1729 transitions. Word has length 78 [2022-02-24 01:13:00,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:00,574 INFO L470 AbstractCegarLoop]: Abstraction has 1244 states and 1729 transitions. [2022-02-24 01:13:00,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 33 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:00,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1729 transitions. [2022-02-24 01:13:00,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-24 01:13:00,577 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:00,577 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:00,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 01:13:00,577 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:00,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:00,577 INFO L85 PathProgramCache]: Analyzing trace with hash -576749334, now seen corresponding path program 8 times [2022-02-24 01:13:00,578 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:00,578 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461459108] [2022-02-24 01:13:00,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:00,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:00,580 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:00,580 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:00,580 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:00,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:00,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:00,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:00,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 01:13:00,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:01,206 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:01,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461459108] [2022-02-24 01:13:01,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [461459108] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:01,206 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:01,206 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:13:01,206 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272337379] [2022-02-24 01:13:01,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:01,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:13:01,207 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:01,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:13:01,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:13:01,208 INFO L87 Difference]: Start difference. First operand 1244 states and 1729 transitions. Second operand has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 21 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:03,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:03,878 INFO L93 Difference]: Finished difference Result 3454 states and 4820 transitions. [2022-02-24 01:13:03,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:13:03,878 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 21 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 78 [2022-02-24 01:13:03,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:03,882 INFO L225 Difference]: With dead ends: 3454 [2022-02-24 01:13:03,882 INFO L226 Difference]: Without dead ends: 1307 [2022-02-24 01:13:03,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=364, Invalid=2288, Unknown=0, NotChecked=0, Total=2652 [2022-02-24 01:13:03,886 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 156 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:03,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 26 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:13:03,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2022-02-24 01:13:04,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1234. [2022-02-24 01:13:04,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1226 states have (on average 1.3882544861337685) internal successors, (1702), 1226 states have internal predecessors, (1702), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:13:04,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1709 transitions. [2022-02-24 01:13:04,588 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1709 transitions. Word has length 78 [2022-02-24 01:13:04,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:04,588 INFO L470 AbstractCegarLoop]: Abstraction has 1234 states and 1709 transitions. [2022-02-24 01:13:04,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 21 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:04,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1709 transitions. [2022-02-24 01:13:04,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-24 01:13:04,591 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:04,591 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:04,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 01:13:04,591 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:04,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:04,592 INFO L85 PathProgramCache]: Analyzing trace with hash 554165348, now seen corresponding path program 9 times [2022-02-24 01:13:04,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:04,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879553847] [2022-02-24 01:13:04,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:04,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:04,596 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:04,596 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:04,596 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:04,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:04,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:04,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:04,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 01:13:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:04,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:04,883 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:04,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879553847] [2022-02-24 01:13:04,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1879553847] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:04,883 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:04,883 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 01:13:04,883 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842201560] [2022-02-24 01:13:04,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:04,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:13:04,884 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:04,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:13:04,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:13:04,884 INFO L87 Difference]: Start difference. First operand 1234 states and 1709 transitions. Second operand has 18 states, 16 states have (on average 2.3125) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:06,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:06,298 INFO L93 Difference]: Finished difference Result 1257 states and 1735 transitions. [2022-02-24 01:13:06,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 01:13:06,298 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 78 [2022-02-24 01:13:06,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:06,302 INFO L225 Difference]: With dead ends: 1257 [2022-02-24 01:13:06,302 INFO L226 Difference]: Without dead ends: 1255 [2022-02-24 01:13:06,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=298, Invalid=1184, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 01:13:06,303 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 120 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:06,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 33 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:13:06,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2022-02-24 01:13:07,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 1240. [2022-02-24 01:13:07,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1230 states have (on average 1.3869918699186992) internal successors, (1706), 1231 states have internal predecessors, (1706), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 01:13:07,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1715 transitions. [2022-02-24 01:13:07,076 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1715 transitions. Word has length 78 [2022-02-24 01:13:07,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:07,077 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 1715 transitions. [2022-02-24 01:13:07,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:07,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1715 transitions. [2022-02-24 01:13:07,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-24 01:13:07,080 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:07,080 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:07,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 01:13:07,080 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:07,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:07,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1204805976, now seen corresponding path program 1 times [2022-02-24 01:13:07,081 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:07,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794181901] [2022-02-24 01:13:07,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:07,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:07,084 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:07,084 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:07,084 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:07,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:07,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:07,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:07,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 01:13:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:08,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-24 01:13:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:08,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:08,895 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:08,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794181901] [2022-02-24 01:13:08,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [794181901] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:08,896 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:08,896 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-24 01:13:08,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539287265] [2022-02-24 01:13:08,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:08,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:13:08,896 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:08,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:13:08,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1217, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:13:08,897 INFO L87 Difference]: Start difference. First operand 1240 states and 1715 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 35 states have internal predecessors, (67), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:13:15,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:15,459 INFO L93 Difference]: Finished difference Result 2715 states and 3794 transitions. [2022-02-24 01:13:15,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-24 01:13:15,460 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 35 states have internal predecessors, (67), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 86 [2022-02-24 01:13:15,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:15,463 INFO L225 Difference]: With dead ends: 2715 [2022-02-24 01:13:15,463 INFO L226 Difference]: Without dead ends: 1409 [2022-02-24 01:13:15,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=793, Invalid=7217, Unknown=0, NotChecked=0, Total=8010 [2022-02-24 01:13:15,466 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 211 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2017 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 2193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 2017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:15,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 32 Invalid, 2193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 2017 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 01:13:15,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2022-02-24 01:13:16,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 1187. [2022-02-24 01:13:16,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1177 states have (on average 1.3857264231096007) internal successors, (1631), 1178 states have internal predecessors, (1631), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 01:13:16,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 1640 transitions. [2022-02-24 01:13:16,222 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 1640 transitions. Word has length 86 [2022-02-24 01:13:16,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:16,222 INFO L470 AbstractCegarLoop]: Abstraction has 1187 states and 1640 transitions. [2022-02-24 01:13:16,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 35 states have internal predecessors, (67), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:13:16,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 1640 transitions. [2022-02-24 01:13:16,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-24 01:13:16,225 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:16,226 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:16,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 01:13:16,226 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:16,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:16,226 INFO L85 PathProgramCache]: Analyzing trace with hash 748399576, now seen corresponding path program 2 times [2022-02-24 01:13:16,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:16,226 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073676936] [2022-02-24 01:13:16,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:16,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:16,229 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:16,229 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:16,229 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:16,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:16,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:16,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 01:13:16,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:17,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-24 01:13:17,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:17,048 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:17,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073676936] [2022-02-24 01:13:17,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2073676936] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:17,048 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:17,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:13:17,048 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206330828] [2022-02-24 01:13:17,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:17,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:13:17,049 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:17,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:13:17,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:13:17,049 INFO L87 Difference]: Start difference. First operand 1187 states and 1640 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 23 states have internal predecessors, (52), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:13:20,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:20,881 INFO L93 Difference]: Finished difference Result 3156 states and 4373 transitions. [2022-02-24 01:13:20,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-24 01:13:20,881 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 23 states have internal predecessors, (52), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 86 [2022-02-24 01:13:20,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:20,886 INFO L225 Difference]: With dead ends: 3156 [2022-02-24 01:13:20,886 INFO L226 Difference]: Without dead ends: 1666 [2022-02-24 01:13:20,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=721, Invalid=3971, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:13:20,888 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 169 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:20,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 27 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:13:20,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1666 states. [2022-02-24 01:13:21,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1666 to 1616. [2022-02-24 01:13:21,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1606 states have (on average 1.3779576587795765) internal successors, (2213), 1607 states have internal predecessors, (2213), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 01:13:21,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 2222 transitions. [2022-02-24 01:13:21,958 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 2222 transitions. Word has length 86 [2022-02-24 01:13:21,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:21,958 INFO L470 AbstractCegarLoop]: Abstraction has 1616 states and 2222 transitions. [2022-02-24 01:13:21,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 23 states have internal predecessors, (52), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:13:21,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 2222 transitions. [2022-02-24 01:13:21,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-24 01:13:21,961 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:21,961 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:21,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 01:13:21,962 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:21,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:21,962 INFO L85 PathProgramCache]: Analyzing trace with hash -148993702, now seen corresponding path program 3 times [2022-02-24 01:13:21,962 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:21,962 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071830420] [2022-02-24 01:13:21,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:21,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:21,965 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:21,965 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:21,966 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:21,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:22,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:22,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 01:13:22,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:22,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-24 01:13:22,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:22,401 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:22,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071830420] [2022-02-24 01:13:22,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2071830420] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:22,401 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:22,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:13:22,401 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133902992] [2022-02-24 01:13:22,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:22,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:13:22,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:22,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:13:22,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:13:22,402 INFO L87 Difference]: Start difference. First operand 1616 states and 2222 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:13:23,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:23,409 INFO L93 Difference]: Finished difference Result 2592 states and 3580 transitions. [2022-02-24 01:13:23,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:13:23,409 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 86 [2022-02-24 01:13:23,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:23,412 INFO L225 Difference]: With dead ends: 2592 [2022-02-24 01:13:23,412 INFO L226 Difference]: Without dead ends: 1099 [2022-02-24 01:13:23,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:13:23,415 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 60 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:23,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 23 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:23,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2022-02-24 01:13:24,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 1099. [2022-02-24 01:13:24,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 1089 states have (on average 1.386593204775023) internal successors, (1510), 1090 states have internal predecessors, (1510), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 01:13:24,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1519 transitions. [2022-02-24 01:13:24,095 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1519 transitions. Word has length 86 [2022-02-24 01:13:24,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:24,096 INFO L470 AbstractCegarLoop]: Abstraction has 1099 states and 1519 transitions. [2022-02-24 01:13:24,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:13:24,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1519 transitions. [2022-02-24 01:13:24,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-24 01:13:24,098 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:24,098 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:24,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 01:13:24,098 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:24,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:24,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1844645982, now seen corresponding path program 4 times [2022-02-24 01:13:24,099 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:24,099 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954356668] [2022-02-24 01:13:24,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:24,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:24,102 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:24,102 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:24,102 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:24,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:24,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:24,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 01:13:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:24,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-24 01:13:24,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:24,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:24,691 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:24,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954356668] [2022-02-24 01:13:24,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1954356668] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:24,691 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:24,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:13:24,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648096297] [2022-02-24 01:13:24,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:24,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:13:24,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:24,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:13:24,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:13:24,692 INFO L87 Difference]: Start difference. First operand 1099 states and 1519 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:13:28,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:28,931 INFO L93 Difference]: Finished difference Result 2536 states and 3460 transitions. [2022-02-24 01:13:28,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-24 01:13:28,931 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 86 [2022-02-24 01:13:28,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:28,935 INFO L225 Difference]: With dead ends: 2536 [2022-02-24 01:13:28,935 INFO L226 Difference]: Without dead ends: 1895 [2022-02-24 01:13:28,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1782 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1260, Invalid=5220, Unknown=0, NotChecked=0, Total=6480 [2022-02-24 01:13:28,937 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 234 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:28,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 32 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:13:28,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2022-02-24 01:13:29,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1197. [2022-02-24 01:13:29,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1187 states have (on average 1.3833192923336142) internal successors, (1642), 1188 states have internal predecessors, (1642), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 01:13:29,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1651 transitions. [2022-02-24 01:13:29,747 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1651 transitions. Word has length 86 [2022-02-24 01:13:29,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:29,747 INFO L470 AbstractCegarLoop]: Abstraction has 1197 states and 1651 transitions. [2022-02-24 01:13:29,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:13:29,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1651 transitions. [2022-02-24 01:13:29,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-24 01:13:29,749 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:29,749 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:29,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 01:13:29,750 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:29,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:29,750 INFO L85 PathProgramCache]: Analyzing trace with hash 947252704, now seen corresponding path program 5 times [2022-02-24 01:13:29,750 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:29,750 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648070590] [2022-02-24 01:13:29,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:29,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:29,753 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:29,753 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:29,754 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:30,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:30,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 01:13:30,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:31,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-24 01:13:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:31,538 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:31,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648070590] [2022-02-24 01:13:31,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [648070590] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:31,539 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:31,539 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:13:31,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902482935] [2022-02-24 01:13:31,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:31,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:13:31,539 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:31,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:13:31,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:13:31,540 INFO L87 Difference]: Start difference. First operand 1197 states and 1651 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 34 states have internal predecessors, (67), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:13:47,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:47,968 INFO L93 Difference]: Finished difference Result 2974 states and 4028 transitions. [2022-02-24 01:13:47,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-02-24 01:13:47,969 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 34 states have internal predecessors, (67), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 86 [2022-02-24 01:13:47,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:47,973 INFO L225 Difference]: With dead ends: 2974 [2022-02-24 01:13:47,973 INFO L226 Difference]: Without dead ends: 2178 [2022-02-24 01:13:47,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8652 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=3658, Invalid=22102, Unknown=0, NotChecked=0, Total=25760 [2022-02-24 01:13:47,976 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 374 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 1984 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 2341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 1984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:47,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 26 Invalid, 2341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 1984 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 01:13:47,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2178 states. [2022-02-24 01:13:49,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2178 to 1727. [2022-02-24 01:13:49,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 1717 states have (on average 1.3739079790331974) internal successors, (2359), 1718 states have internal predecessors, (2359), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 01:13:49,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 2368 transitions. [2022-02-24 01:13:49,335 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 2368 transitions. Word has length 86 [2022-02-24 01:13:49,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:49,335 INFO L470 AbstractCegarLoop]: Abstraction has 1727 states and 2368 transitions. [2022-02-24 01:13:49,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 34 states have internal predecessors, (67), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:13:49,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 2368 transitions. [2022-02-24 01:13:49,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-24 01:13:49,337 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:49,337 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:49,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 01:13:49,337 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:49,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:49,338 INFO L85 PathProgramCache]: Analyzing trace with hash 490846304, now seen corresponding path program 6 times [2022-02-24 01:13:49,338 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:49,338 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280444216] [2022-02-24 01:13:49,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:49,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:49,341 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:49,341 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:49,341 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:49,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:49,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:49,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 01:13:49,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:49,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-24 01:13:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:49,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:49,918 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:49,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280444216] [2022-02-24 01:13:49,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [280444216] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:49,919 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:49,919 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:13:49,919 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998758500] [2022-02-24 01:13:49,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:49,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:13:49,920 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:49,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:13:49,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:13:49,920 INFO L87 Difference]: Start difference. First operand 1727 states and 2368 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 16 states have internal predecessors, (42), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:13:51,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:51,696 INFO L93 Difference]: Finished difference Result 2908 states and 3995 transitions. [2022-02-24 01:13:51,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:13:51,697 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 16 states have internal predecessors, (42), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 86 [2022-02-24 01:13:51,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:51,700 INFO L225 Difference]: With dead ends: 2908 [2022-02-24 01:13:51,700 INFO L226 Difference]: Without dead ends: 1643 [2022-02-24 01:13:51,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:13:51,702 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 74 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:51,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 24 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:51,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2022-02-24 01:13:52,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1643. [2022-02-24 01:13:52,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1633 states have (on average 1.3790569503980403) internal successors, (2252), 1634 states have internal predecessors, (2252), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 01:13:52,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 2261 transitions. [2022-02-24 01:13:52,909 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 2261 transitions. Word has length 86 [2022-02-24 01:13:52,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:52,909 INFO L470 AbstractCegarLoop]: Abstraction has 1643 states and 2261 transitions. [2022-02-24 01:13:52,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 16 states have internal predecessors, (42), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:13:52,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 2261 transitions. [2022-02-24 01:13:52,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-24 01:13:52,912 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:52,912 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:52,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 01:13:52,912 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:52,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:52,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1889621536, now seen corresponding path program 7 times [2022-02-24 01:13:52,913 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:52,913 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264042319] [2022-02-24 01:13:52,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:52,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:52,916 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:52,916 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:52,916 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:52,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:53,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:53,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 01:13:53,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:53,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-24 01:13:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:53,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:53,946 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:53,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264042319] [2022-02-24 01:13:53,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [264042319] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:53,946 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:53,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:13:53,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271589542] [2022-02-24 01:13:53,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:53,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:13:53,946 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:53,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:13:53,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:13:53,947 INFO L87 Difference]: Start difference. First operand 1643 states and 2261 transitions. Second operand has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 32 states have internal predecessors, (63), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:14:00,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:00,189 INFO L93 Difference]: Finished difference Result 2375 states and 3203 transitions. [2022-02-24 01:14:00,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-24 01:14:00,190 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 32 states have internal predecessors, (63), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 86 [2022-02-24 01:14:00,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:00,194 INFO L225 Difference]: With dead ends: 2375 [2022-02-24 01:14:00,194 INFO L226 Difference]: Without dead ends: 2226 [2022-02-24 01:14:00,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3781 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1821, Invalid=11061, Unknown=0, NotChecked=0, Total=12882 [2022-02-24 01:14:00,196 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 309 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:00,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 46 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 1382 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:14:00,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2022-02-24 01:14:01,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1317. [2022-02-24 01:14:01,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 1307 states have (on average 1.3603672532517215) internal successors, (1778), 1308 states have internal predecessors, (1778), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 01:14:01,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 1787 transitions. [2022-02-24 01:14:01,269 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 1787 transitions. Word has length 86 [2022-02-24 01:14:01,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:01,269 INFO L470 AbstractCegarLoop]: Abstraction has 1317 states and 1787 transitions. [2022-02-24 01:14:01,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 32 states have internal predecessors, (63), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:14:01,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 1787 transitions. [2022-02-24 01:14:01,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-24 01:14:01,272 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:01,272 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:01,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 01:14:01,272 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:01,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:01,272 INFO L85 PathProgramCache]: Analyzing trace with hash -2024047708, now seen corresponding path program 8 times [2022-02-24 01:14:01,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:01,273 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222491252] [2022-02-24 01:14:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:01,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:01,275 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:01,275 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:01,275 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:01,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:01,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:01,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 01:14:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:02,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-24 01:14:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:02,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:02,358 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:02,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222491252] [2022-02-24 01:14:02,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1222491252] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:02,358 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:02,358 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:14:02,358 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804484862] [2022-02-24 01:14:02,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:02,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:14:02,359 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:02,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:14:02,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:14:02,359 INFO L87 Difference]: Start difference. First operand 1317 states and 1787 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 27 states have internal predecessors, (52), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:14:08,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:08,240 INFO L93 Difference]: Finished difference Result 1872 states and 2493 transitions. [2022-02-24 01:14:08,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-24 01:14:08,241 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 27 states have internal predecessors, (52), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 86 [2022-02-24 01:14:08,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:08,243 INFO L225 Difference]: With dead ends: 1872 [2022-02-24 01:14:08,243 INFO L226 Difference]: Without dead ends: 1306 [2022-02-24 01:14:08,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=939, Invalid=4611, Unknown=0, NotChecked=0, Total=5550 [2022-02-24 01:14:08,245 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 263 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:08,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 22 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:14:08,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2022-02-24 01:14:09,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 1087. [2022-02-24 01:14:09,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1077 states have (on average 1.3537604456824512) internal successors, (1458), 1078 states have internal predecessors, (1458), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 01:14:09,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1467 transitions. [2022-02-24 01:14:09,181 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1467 transitions. Word has length 86 [2022-02-24 01:14:09,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:09,181 INFO L470 AbstractCegarLoop]: Abstraction has 1087 states and 1467 transitions. [2022-02-24 01:14:09,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 27 states have internal predecessors, (52), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:14:09,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1467 transitions. [2022-02-24 01:14:09,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-24 01:14:09,183 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:09,183 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:09,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 01:14:09,184 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:09,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:09,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1051546082, now seen corresponding path program 9 times [2022-02-24 01:14:09,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:09,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639621571] [2022-02-24 01:14:09,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:09,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:09,187 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:09,187 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:09,188 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:09,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:09,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 01:14:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:09,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-24 01:14:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:09,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:09,798 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:09,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639621571] [2022-02-24 01:14:09,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1639621571] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:09,798 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:09,798 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 01:14:09,798 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407334758] [2022-02-24 01:14:09,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:09,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 01:14:09,799 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:09,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 01:14:09,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:14:09,799 INFO L87 Difference]: Start difference. First operand 1087 states and 1467 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 15 states have internal predecessors, (42), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:14:11,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:11,235 INFO L93 Difference]: Finished difference Result 1983 states and 2694 transitions. [2022-02-24 01:14:11,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:14:11,236 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 15 states have internal predecessors, (42), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 86 [2022-02-24 01:14:11,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:11,238 INFO L225 Difference]: With dead ends: 1983 [2022-02-24 01:14:11,238 INFO L226 Difference]: Without dead ends: 927 [2022-02-24 01:14:11,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:14:11,240 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 70 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:11,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 25 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:14:11,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-02-24 01:14:11,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 926. [2022-02-24 01:14:11,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 916 states have (on average 1.3635371179039302) internal successors, (1249), 917 states have internal predecessors, (1249), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 01:14:11,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1258 transitions. [2022-02-24 01:14:11,994 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1258 transitions. Word has length 86 [2022-02-24 01:14:11,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:11,994 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 1258 transitions. [2022-02-24 01:14:11,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 15 states have internal predecessors, (42), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:14:11,994 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1258 transitions. [2022-02-24 01:14:11,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-24 01:14:11,996 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:11,996 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:11,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 01:14:11,996 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:11,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:11,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1848946786, now seen corresponding path program 10 times [2022-02-24 01:14:11,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:11,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773667591] [2022-02-24 01:14:11,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:11,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:12,000 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:12,000 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:12,000 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:12,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:12,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:12,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:12,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 01:14:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:12,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-24 01:14:12,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:12,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:12,417 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:12,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773667591] [2022-02-24 01:14:12,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1773667591] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:12,417 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:12,417 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:14:12,417 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922814404] [2022-02-24 01:14:12,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:12,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:14:12,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:12,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:14:12,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:14:12,418 INFO L87 Difference]: Start difference. First operand 926 states and 1258 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 16 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:14:14,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:14,125 INFO L93 Difference]: Finished difference Result 957 states and 1294 transitions. [2022-02-24 01:14:14,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 01:14:14,126 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 16 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 86 [2022-02-24 01:14:14,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:14,128 INFO L225 Difference]: With dead ends: 957 [2022-02-24 01:14:14,128 INFO L226 Difference]: Without dead ends: 955 [2022-02-24 01:14:14,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 01:14:14,129 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 157 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:14,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 43 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:14:14,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2022-02-24 01:14:14,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 934. [2022-02-24 01:14:14,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 922 states have (on average 1.36117136659436) internal successors, (1255), 923 states have internal predecessors, (1255), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 01:14:14,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1266 transitions. [2022-02-24 01:14:14,881 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1266 transitions. Word has length 86 [2022-02-24 01:14:14,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:14,881 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 1266 transitions. [2022-02-24 01:14:14,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 16 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:14:14,881 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1266 transitions. [2022-02-24 01:14:14,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-24 01:14:14,882 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:14,883 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:14,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 01:14:14,883 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:14,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:14,883 INFO L85 PathProgramCache]: Analyzing trace with hash 2004447890, now seen corresponding path program 11 times [2022-02-24 01:14:14,883 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:14,883 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196530842] [2022-02-24 01:14:14,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:14,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:14,886 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:14,886 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:14,886 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:14,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:14,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:14,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 01:14:14,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:15,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-24 01:14:15,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:15,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-02-24 01:14:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:15,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:15,709 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:15,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196530842] [2022-02-24 01:14:15,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [196530842] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:15,709 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:15,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:14:15,710 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283126606] [2022-02-24 01:14:15,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:15,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:14:15,710 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:15,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:14:15,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:14:15,711 INFO L87 Difference]: Start difference. First operand 934 states and 1266 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 27 states have internal predecessors, (63), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:14:19,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:19,583 INFO L93 Difference]: Finished difference Result 2102 states and 2862 transitions. [2022-02-24 01:14:19,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-24 01:14:19,583 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 27 states have internal predecessors, (63), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 94 [2022-02-24 01:14:19,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:19,588 INFO L225 Difference]: With dead ends: 2102 [2022-02-24 01:14:19,588 INFO L226 Difference]: Without dead ends: 1938 [2022-02-24 01:14:19,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2054 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1062, Invalid=6078, Unknown=0, NotChecked=0, Total=7140 [2022-02-24 01:14:19,589 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 352 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:19,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 41 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:14:19,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1938 states. [2022-02-24 01:14:20,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1938 to 1154. [2022-02-24 01:14:20,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1142 states have (on average 1.3555166374781087) internal successors, (1548), 1143 states have internal predecessors, (1548), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 01:14:20,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1559 transitions. [2022-02-24 01:14:20,559 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1559 transitions. Word has length 94 [2022-02-24 01:14:20,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:20,560 INFO L470 AbstractCegarLoop]: Abstraction has 1154 states and 1559 transitions. [2022-02-24 01:14:20,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 27 states have internal predecessors, (63), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:14:20,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1559 transitions. [2022-02-24 01:14:20,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-24 01:14:20,561 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:20,561 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:20,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 01:14:20,562 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:20,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:20,562 INFO L85 PathProgramCache]: Analyzing trace with hash 377110614, now seen corresponding path program 12 times [2022-02-24 01:14:20,562 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:20,562 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089301723] [2022-02-24 01:14:20,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:20,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:20,565 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:20,565 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:20,565 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:20,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:20,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:21,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 01:14:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:21,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-24 01:14:21,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:21,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-02-24 01:14:21,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:21,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:21,085 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:21,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089301723] [2022-02-24 01:14:21,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1089301723] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:21,085 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:21,085 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:14:21,085 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747916240] [2022-02-24 01:14:21,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:21,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:14:21,086 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:21,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:14:21,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:14:21,086 INFO L87 Difference]: Start difference. First operand 1154 states and 1559 transitions. Second operand has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 19 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 01:14:22,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:22,965 INFO L93 Difference]: Finished difference Result 1166 states and 1571 transitions. [2022-02-24 01:14:22,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 01:14:22,965 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 19 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 94 [2022-02-24 01:14:22,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:22,968 INFO L225 Difference]: With dead ends: 1166 [2022-02-24 01:14:22,968 INFO L226 Difference]: Without dead ends: 1164 [2022-02-24 01:14:22,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=259, Invalid=1547, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 01:14:22,969 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 110 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:22,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 43 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:14:22,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2022-02-24 01:14:23,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1162. [2022-02-24 01:14:23,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1148 states have (on average 1.353658536585366) internal successors, (1554), 1149 states have internal predecessors, (1554), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 01:14:23,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1567 transitions. [2022-02-24 01:14:23,986 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1567 transitions. Word has length 94 [2022-02-24 01:14:23,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:23,986 INFO L470 AbstractCegarLoop]: Abstraction has 1162 states and 1567 transitions. [2022-02-24 01:14:23,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 19 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 01:14:23,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1567 transitions. [2022-02-24 01:14:23,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:14:23,989 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:23,989 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:23,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 01:14:23,989 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:23,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:23,989 INFO L85 PathProgramCache]: Analyzing trace with hash 661138250, now seen corresponding path program 13 times [2022-02-24 01:14:23,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:23,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616918889] [2022-02-24 01:14:23,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:23,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:23,992 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:23,992 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:23,992 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:24,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:24,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:24,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 01:14:24,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:24,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-24 01:14:24,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:24,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-02-24 01:14:24,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:24,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-02-24 01:14:24,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:24,891 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:24,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616918889] [2022-02-24 01:14:24,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1616918889] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:24,891 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:24,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:14:24,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125182414] [2022-02-24 01:14:24,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:24,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:14:24,891 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:24,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:14:24,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:14:24,892 INFO L87 Difference]: Start difference. First operand 1162 states and 1567 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 24 states have internal predecessors, (51), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:14:32,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:32,553 INFO L93 Difference]: Finished difference Result 3855 states and 5176 transitions. [2022-02-24 01:14:32,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-24 01:14:32,553 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 24 states have internal predecessors, (51), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 102 [2022-02-24 01:14:32,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:32,557 INFO L225 Difference]: With dead ends: 3855 [2022-02-24 01:14:32,557 INFO L226 Difference]: Without dead ends: 1991 [2022-02-24 01:14:32,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2489 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1464, Invalid=6908, Unknown=0, NotChecked=0, Total=8372 [2022-02-24 01:14:32,559 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 193 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:32,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 36 Invalid, 1358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:14:32,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1991 states. [2022-02-24 01:14:33,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1991 to 1523. [2022-02-24 01:14:33,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1509 states have (on average 1.3373094764744864) internal successors, (2018), 1510 states have internal predecessors, (2018), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 01:14:33,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 2031 transitions. [2022-02-24 01:14:33,955 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 2031 transitions. Word has length 102 [2022-02-24 01:14:33,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:33,956 INFO L470 AbstractCegarLoop]: Abstraction has 1523 states and 2031 transitions. [2022-02-24 01:14:33,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 24 states have internal predecessors, (51), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:14:33,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 2031 transitions. [2022-02-24 01:14:33,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:14:33,958 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:33,959 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 7, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:33,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 01:14:33,959 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:33,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:33,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1400698044, now seen corresponding path program 14 times [2022-02-24 01:14:33,959 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:33,959 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543074131] [2022-02-24 01:14:33,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:33,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:33,963 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:33,963 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:33,963 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:34,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:34,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 01:14:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:34,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-24 01:14:34,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:34,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-02-24 01:14:34,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:34,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-02-24 01:14:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:34,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:34,576 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:34,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543074131] [2022-02-24 01:14:34,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [543074131] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:34,576 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:34,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:14:34,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681961364] [2022-02-24 01:14:34,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:34,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:14:34,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:34,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:14:34,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:14:34,577 INFO L87 Difference]: Start difference. First operand 1523 states and 2031 transitions. Second operand has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 19 states have internal predecessors, (48), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 01:14:37,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:37,001 INFO L93 Difference]: Finished difference Result 1539 states and 2048 transitions. [2022-02-24 01:14:37,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:14:37,002 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 19 states have internal predecessors, (48), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 102 [2022-02-24 01:14:37,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:37,005 INFO L225 Difference]: With dead ends: 1539 [2022-02-24 01:14:37,005 INFO L226 Difference]: Without dead ends: 1537 [2022-02-24 01:14:37,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=219, Invalid=1341, Unknown=0, NotChecked=0, Total=1560 [2022-02-24 01:14:37,006 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 111 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:37,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 45 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:14:37,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2022-02-24 01:14:38,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1531. [2022-02-24 01:14:38,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1515 states have (on average 1.335973597359736) internal successors, (2024), 1516 states have internal predecessors, (2024), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-24 01:14:38,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 2039 transitions. [2022-02-24 01:14:38,415 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 2039 transitions. Word has length 102 [2022-02-24 01:14:38,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:38,415 INFO L470 AbstractCegarLoop]: Abstraction has 1531 states and 2039 transitions. [2022-02-24 01:14:38,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 19 states have internal predecessors, (48), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 01:14:38,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 2039 transitions. [2022-02-24 01:14:38,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-02-24 01:14:38,417 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:38,417 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:38,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 01:14:38,417 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:38,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:38,418 INFO L85 PathProgramCache]: Analyzing trace with hash 212215864, now seen corresponding path program 15 times [2022-02-24 01:14:38,418 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:38,418 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835057052] [2022-02-24 01:14:38,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:38,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:38,421 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:38,421 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:38,421 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:38,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:38,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:38,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 01:14:38,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:39,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-24 01:14:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:39,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-02-24 01:14:39,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:39,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-02-24 01:14:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:39,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-02-24 01:14:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:39,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:39,576 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:39,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835057052] [2022-02-24 01:14:39,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1835057052] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:39,576 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:39,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:14:39,577 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344946166] [2022-02-24 01:14:39,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:39,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:14:39,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:39,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:14:39,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:14:39,578 INFO L87 Difference]: Start difference. First operand 1531 states and 2039 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 26 states have internal predecessors, (52), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:14:43,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:43,909 INFO L93 Difference]: Finished difference Result 2549 states and 3408 transitions. [2022-02-24 01:14:43,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:14:43,910 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 26 states have internal predecessors, (52), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 110 [2022-02-24 01:14:43,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:43,912 INFO L225 Difference]: With dead ends: 2549 [2022-02-24 01:14:43,912 INFO L226 Difference]: Without dead ends: 1404 [2022-02-24 01:14:43,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=398, Invalid=3024, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:14:43,914 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 173 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:43,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 26 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:14:43,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2022-02-24 01:14:45,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1380. [2022-02-24 01:14:45,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1364 states have (on average 1.3299120234604105) internal successors, (1814), 1365 states have internal predecessors, (1814), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-24 01:14:45,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 1829 transitions. [2022-02-24 01:14:45,189 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 1829 transitions. Word has length 110 [2022-02-24 01:14:45,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:45,190 INFO L470 AbstractCegarLoop]: Abstraction has 1380 states and 1829 transitions. [2022-02-24 01:14:45,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 26 states have internal predecessors, (52), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:14:45,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 1829 transitions. [2022-02-24 01:14:45,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-02-24 01:14:45,192 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:45,192 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:45,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 01:14:45,193 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:45,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:45,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1003937862, now seen corresponding path program 16 times [2022-02-24 01:14:45,193 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:45,193 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926299330] [2022-02-24 01:14:45,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:45,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:45,197 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:45,197 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:45,197 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:45,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:45,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:45,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 01:14:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:45,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-24 01:14:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:45,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-02-24 01:14:45,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:45,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-02-24 01:14:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:45,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-02-24 01:14:45,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:45,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:45,904 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:45,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926299330] [2022-02-24 01:14:45,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [926299330] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:45,904 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:45,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:14:45,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065696160] [2022-02-24 01:14:45,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:45,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:14:45,905 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:45,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:14:45,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:14:45,905 INFO L87 Difference]: Start difference. First operand 1380 states and 1829 transitions. Second operand has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 01:14:48,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:48,469 INFO L93 Difference]: Finished difference Result 1392 states and 1841 transitions. [2022-02-24 01:14:48,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 01:14:48,469 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 110 [2022-02-24 01:14:48,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:48,473 INFO L225 Difference]: With dead ends: 1392 [2022-02-24 01:14:48,473 INFO L226 Difference]: Without dead ends: 1390 [2022-02-24 01:14:48,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=314, Invalid=1848, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:14:48,474 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 121 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:48,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 52 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:14:48,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2022-02-24 01:14:49,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1388. [2022-02-24 01:14:49,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1370 states have (on average 1.3284671532846715) internal successors, (1820), 1371 states have internal predecessors, (1820), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-24 01:14:49,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 1837 transitions. [2022-02-24 01:14:49,750 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 1837 transitions. Word has length 110 [2022-02-24 01:14:49,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:49,750 INFO L470 AbstractCegarLoop]: Abstraction has 1388 states and 1837 transitions. [2022-02-24 01:14:49,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 01:14:49,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 1837 transitions. [2022-02-24 01:14:49,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-02-24 01:14:49,752 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:49,752 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:49,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 01:14:49,753 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:49,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:49,753 INFO L85 PathProgramCache]: Analyzing trace with hash -830249298, now seen corresponding path program 17 times [2022-02-24 01:14:49,753 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:49,753 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392483628] [2022-02-24 01:14:49,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:49,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:49,756 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:49,756 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:49,756 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:49,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:49,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:49,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 01:14:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:49,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-24 01:14:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:49,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-02-24 01:14:49,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:49,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-02-24 01:14:49,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:49,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-02-24 01:14:49,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:49,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-02-24 01:14:49,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:49,855 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:49,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392483628] [2022-02-24 01:14:49,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [392483628] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:49,856 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:49,856 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:14:49,856 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253969732] [2022-02-24 01:14:49,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:49,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:14:49,856 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:49,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:14:49,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:14:49,857 INFO L87 Difference]: Start difference. First operand 1388 states and 1837 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 8 states have internal predecessors, (40), 7 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-02-24 01:14:51,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:51,314 INFO L93 Difference]: Finished difference Result 1391 states and 1840 transitions. [2022-02-24 01:14:51,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:14:51,314 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 8 states have internal predecessors, (40), 7 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 118 [2022-02-24 01:14:51,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:51,315 INFO L225 Difference]: With dead ends: 1391 [2022-02-24 01:14:51,315 INFO L226 Difference]: Without dead ends: 0 [2022-02-24 01:14:51,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:14:51,317 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 47 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:51,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 37 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:14:51,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-24 01:14:51,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-24 01:14:51,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-24 01:14:51,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-24 01:14:51,318 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 118 [2022-02-24 01:14:51,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:51,318 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-24 01:14:51,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 8 states have internal predecessors, (40), 7 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-02-24 01:14:51,319 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-24 01:14:51,319 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-24 01:14:51,321 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-24 01:14:51,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-24 01:14:51,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.